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用递等式计算712÷9+19×512[45-0÷(13+25)]×58(3.8-1.8÷2)×0.32÷23-23÷2(115+217)×15×17(15-15×45)×724.
题目详情
用递等式计算
| [
| ||||||||||||||
(3.8-1.8÷2)×0.3 | 2÷
| ||||||||||||||
(
| (15-15×
|
用递等式计算
| [
| ||||||||||||||
(3.8-1.8÷2)×0.3 | 2÷
| ||||||||||||||
(
| (15-15×
|
7 |
12 |
1 |
9 |
5 |
12 |
[
4 |
5 |
1 |
3 |
2 |
5 |
5 |
8 |
7 |
12 |
1 |
9 |
5 |
12 |
7 |
12 |
1 |
9 |
5 |
12 |
7 |
12 |
1 |
9 |
5 |
12 |
1 |
9 |
5 |
12 |
5 |
12 |
[
4 |
5 |
1 |
3 |
2 |
5 |
5 |
8 |
4 |
5 |
1 |
3 |
2 |
5 |
5 |
8 |
4 |
5 |
1 |
3 |
2 |
5 |
5 |
8 |
1 |
3 |
2 |
5 |
5 |
8 |
2 |
5 |
5 |
8 |
5 |
8 |
2 |
3 |
2 |
3 |
2 |
3 |
2 |
3 |
2 |
3 |
2 |
3 |
2 |
3 |
2 |
3 |
2 |
3 |
1 |
15 |
2 |
17 |
4 |
5 |
7 |
24 |
1 |
15 |
2 |
17 |
1 |
15 |
2 |
17 |
1 |
15 |
2 |
17 |
2 |
17 |
4 |
5 |
7 |
24 |
4 |
5 |
7 |
24 |
4 |
5 |
7 |
24 |
7 |
24 |
▼优质解答
答案和解析
(1)
÷9+
×
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(2)[
-0÷(
+
)]×
,
=
×
,
=
;
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
7 7 712 12 12÷9+
×
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(2)[
-0÷(
+
)]×
,
=
×
,
=
;
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
1 1 19 9 9×
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(2)[
-0÷(
+
)]×
,
=
×
,
=
;
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
5 5 512 12 12,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(2)[
-0÷(
+
)]×
,
=
×
,
=
;
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
7 7 712 12 12×
+
×
,
=(
+
)×
,
=1×
,
=
;
(2)[
-0÷(
+
)]×
,
=
×
,
=
;
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
1 1 19 9 9+
×
,
=(
+
)×
,
=1×
,
=
;
(2)[
-0÷(
+
)]×
,
=
×
,
=
;
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
1 1 19 9 9×
,
=(
+
)×
,
=1×
,
=
;
(2)[
-0÷(
+
)]×
,
=
×
,
=
;
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
5 5 512 12 12,
=(
+
)×
,
=1×
,
=
;
(2)[
-0÷(
+
)]×
,
=
×
,
=
;
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
7 7 712 12 12+
5 5 512 12 12)×
,
=1×
,
=
;
(2)[
-0÷(
+
)]×
,
=
×
,
=
;
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
1 1 19 9 9,
=1×
,
=
;
(2)[
-0÷(
+
)]×
,
=
×
,
=
;
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
1 1 19 9 9,
=
;
(2)[
-0÷(
+
)]×
,
=
×
,
=
;
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
1 1 19 9 9;
(2)[
-0÷(
+
)]×
,
=
×
,
=
;
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
4 4 45 5 5-0÷(
+
)]×
,
=
×
,
=
;
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
1 1 13 3 3+
)]×
,
=
×
,
=
;
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
2 2 25 5 5)]×
,
=
×
,
=
;
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
5 5 58 8 8,
=
×
,
=
;
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
4 4 45 5 5×
,
=
;
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
5 5 58 8 8,
=
;
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
1 1 12 2 2;
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
2 2 23 3 3-
÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
2 2 23 3 3÷2,
=3-
,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
1 1 13 3 3,
=2
;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
2 2 23 3 3;
(5)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
1 1 115 15 15+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
2 2 217 17 17)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
1 1 115 15 15×15×17+
×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
2 2 217 17 17×15×17,
=17+30,
=47;
(6)(15-15×
)×
,
=(15-12)×
,
=3×
4 4 45 5 5)×
,
=(15-12)×
,
=3×
7 7 724 24 24,
=(15-12)×
,
=3×
7 7 724 24 24,
=3×
7 |
12 |
1 |
9 |
5 |
12 |
=
7 |
12 |
1 |
9 |
1 |
9 |
5 |
12 |
=(
7 |
12 |
5 |
12 |
1 |
9 |
=1×
1 |
9 |
=
1 |
9 |
(2)[
4 |
5 |
1 |
3 |
2 |
5 |
5 |
8 |
=
4 |
5 |
5 |
8 |
=
1 |
2 |
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
7 |
12 |
1 |
9 |
5 |
12 |
=
7 |
12 |
1 |
9 |
1 |
9 |
5 |
12 |
=(
7 |
12 |
5 |
12 |
1 |
9 |
=1×
1 |
9 |
=
1 |
9 |
(2)[
4 |
5 |
1 |
3 |
2 |
5 |
5 |
8 |
=
4 |
5 |
5 |
8 |
=
1 |
2 |
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
1 |
9 |
5 |
12 |
=
7 |
12 |
1 |
9 |
1 |
9 |
5 |
12 |
=(
7 |
12 |
5 |
12 |
1 |
9 |
=1×
1 |
9 |
=
1 |
9 |
(2)[
4 |
5 |
1 |
3 |
2 |
5 |
5 |
8 |
=
4 |
5 |
5 |
8 |
=
1 |
2 |
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
5 |
12 |
=
7 |
12 |
1 |
9 |
1 |
9 |
5 |
12 |
=(
7 |
12 |
5 |
12 |
1 |
9 |
=1×
1 |
9 |
=
1 |
9 |
(2)[
4 |
5 |
1 |
3 |
2 |
5 |
5 |
8 |
=
4 |
5 |
5 |
8 |
=
1 |
2 |
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
7 |
12 |
1 |
9 |
1 |
9 |
5 |
12 |
=(
7 |
12 |
5 |
12 |
1 |
9 |
=1×
1 |
9 |
=
1 |
9 |
(2)[
4 |
5 |
1 |
3 |
2 |
5 |
5 |
8 |
=
4 |
5 |
5 |
8 |
=
1 |
2 |
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
1 |
9 |
1 |
9 |
5 |
12 |
=(
7 |
12 |
5 |
12 |
1 |
9 |
=1×
1 |
9 |
=
1 |
9 |
(2)[
4 |
5 |
1 |
3 |
2 |
5 |
5 |
8 |
=
4 |
5 |
5 |
8 |
=
1 |
2 |
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
1 |
9 |
5 |
12 |
=(
7 |
12 |
5 |
12 |
1 |
9 |
=1×
1 |
9 |
=
1 |
9 |
(2)[
4 |
5 |
1 |
3 |
2 |
5 |
5 |
8 |
=
4 |
5 |
5 |
8 |
=
1 |
2 |
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
5 |
12 |
=(
7 |
12 |
5 |
12 |
1 |
9 |
=1×
1 |
9 |
=
1 |
9 |
(2)[
4 |
5 |
1 |
3 |
2 |
5 |
5 |
8 |
=
4 |
5 |
5 |
8 |
=
1 |
2 |
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
7 |
12 |
5 |
12 |
1 |
9 |
=1×
1 |
9 |
=
1 |
9 |
(2)[
4 |
5 |
1 |
3 |
2 |
5 |
5 |
8 |
=
4 |
5 |
5 |
8 |
=
1 |
2 |
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
1 |
9 |
=1×
1 |
9 |
=
1 |
9 |
(2)[
4 |
5 |
1 |
3 |
2 |
5 |
5 |
8 |
=
4 |
5 |
5 |
8 |
=
1 |
2 |
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
1 |
9 |
=
1 |
9 |
(2)[
4 |
5 |
1 |
3 |
2 |
5 |
5 |
8 |
=
4 |
5 |
5 |
8 |
=
1 |
2 |
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
1 |
9 |
(2)[
4 |
5 |
1 |
3 |
2 |
5 |
5 |
8 |
=
4 |
5 |
5 |
8 |
=
1 |
2 |
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
4 |
5 |
1 |
3 |
2 |
5 |
5 |
8 |
=
4 |
5 |
5 |
8 |
=
1 |
2 |
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
1 |
3 |
2 |
5 |
5 |
8 |
=
4 |
5 |
5 |
8 |
=
1 |
2 |
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
2 |
5 |
5 |
8 |
=
4 |
5 |
5 |
8 |
=
1 |
2 |
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
5 |
8 |
=
4 |
5 |
5 |
8 |
=
1 |
2 |
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
4 |
5 |
5 |
8 |
=
1 |
2 |
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
5 |
8 |
=
1 |
2 |
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
1 |
2 |
(3)(3.8-1.8÷2)×0.3,
=(3.8-0.9)×0.3,
=2.9×0.3,
=0.87;
(4)2÷
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
2 |
3 |
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
2 |
3 |
=3-
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
1 |
3 |
=2
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
2 |
3 |
(5)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
1 |
15 |
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
2 |
17 |
=17+30,
=47;
(6)(15-15×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
4 |
5 |
7 |
24 |
=(15-12)×
7 |
24 |
=3×
7 |
24 |
=(15-12)×
7 |
24 |
=3×
7 |
24 |
=3×
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