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计算,能简便的要用简便方法计算.(316+124)×8+2334.7-715+65.3-8151-(16+17)×224÷(13+34-16)0.25×32×12.5

题目详情
计算,能简便的要用简便方法计算.
3
16
+
1
24
)×8+
2
3
                          34.7-
7
15
+65.3-
8
15

1-(
1
6
+
1
7
)×2                            24÷(
1
3
+
3
4
-
1
6

0.25×32×12.5                           4.2×0.36+42×6.4%
▼优质解答
答案和解析
(1)(
3
16
+
1
24
)×8+
2
3

=
3
16
×8+
1
24
×8+
2
3

=
3
2
+
1
3
+
2
3

=
3
2
+(
1
3
+
2
3

=
3
2
+1
=2
1
2


(2)34.7-
7
15
+65.3-
8
15

=(34.7+65.3)-(
7
15
+
8
15

=100-1
=99;

(3)1-(
1
6
+
1
7
)×2
=1-
13
42
×2
=1-
13
21

=
8
21


(4)24÷(
1
3
+
3
4
-
1
6

=24÷(
13
12
-
1
6

=24÷
11
12

=
288
11


(5)0.25×32×12.5
=0.25×(4×8)×12.5
=(0.25×4)×(8×12.5)
=1×100
=100;

(6)4.2×0.36+42×6.4%
=4.2×0.36+4.2×0.64
=4.2×(0.36+0.64)
=4.2×1
=4.2.