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用递等式计算.(1)201-28.4×6.5(2)(1-122)×(1-132)×(1-142)(3)2.5-(0.65+0.35÷512)(4)0.9-75÷90+16(5)3-67÷(45-0.38)(6)2.5(4+x)-2.5x
题目详情
用递等式计算. (1)201-28.4×6.5 | (2)(1-
| (3)2.5-(0.65+0.35÷
| ||||||||
(4)0.9-75÷90+
| (5)3-
| (6)2.5(4+x)-2.5x |
用递等式计算. (1)201-28.4×6.5 | (2)(1-
| (3)2.5-(0.65+0.35÷
| ||||||||
(4)0.9-75÷90+
| (5)3-
| (6)2.5(4+x)-2.5x |
(1)201-28.4×6.5
1 |
22 |
1 |
32 |
1 |
42 |
5 |
12 |
(1)201-28.4×6.5
1 |
22 |
1 |
32 |
1 |
42 |
1 |
22 |
1 |
32 |
1 |
42 |
1 |
22 |
1 |
32 |
1 |
42 |
1 |
32 |
1 |
42 |
1 |
42 |
5 |
12 |
5 |
12 |
5 |
12 |
1 |
6 |
6 |
7 |
4 |
5 |
1 |
6 |
1 |
6 |
1 |
6 |
6 |
7 |
4 |
5 |
6 |
7 |
4 |
5 |
6 |
7 |
4 |
5 |
4 |
5 |
▼优质解答
答案和解析
(1)201-28.4×6.5,
=201-184.6,
=16.4;
(2)(1-
)×(1-
)×(1-
),
=(1-
)×(1-
)×(1-
),
=
×
×
,
=
×
,
=
;
(3)2.5-(0.65+0.35÷
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
,
=0.9-
+
,
=
-(
-
),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1 1 122 22 222)×(1-
)×(1-
),
=(1-
)×(1-
)×(1-
),
=
×
×
,
=
×
,
=
;
(3)2.5-(0.65+0.35÷
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
,
=0.9-
+
,
=
-(
-
),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1 1 132 32 322)×(1-
),
=(1-
)×(1-
)×(1-
),
=
×
×
,
=
×
,
=
;
(3)2.5-(0.65+0.35÷
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
,
=0.9-
+
,
=
-(
-
),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1 1 142 42 422),
=(1-
)×(1-
)×(1-
),
=
×
×
,
=
×
,
=
;
(3)2.5-(0.65+0.35÷
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
,
=0.9-
+
,
=
-(
-
),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1 1 14 4 4)×(1-
)×(1-
),
=
×
×
,
=
×
,
=
;
(3)2.5-(0.65+0.35÷
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
,
=0.9-
+
,
=
-(
-
),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1 1 19 9 9)×(1-
),
=
×
×
,
=
×
,
=
;
(3)2.5-(0.65+0.35÷
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
,
=0.9-
+
,
=
-(
-
),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1 1 116 16 16),
=
×
×
,
=
×
,
=
;
(3)2.5-(0.65+0.35÷
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
,
=0.9-
+
,
=
-(
-
),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
3 3 34 4 4×
×
,
=
×
,
=
;
(3)2.5-(0.65+0.35÷
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
,
=0.9-
+
,
=
-(
-
),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
8 8 89 9 9×
,
=
×
,
=
;
(3)2.5-(0.65+0.35÷
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
,
=0.9-
+
,
=
-(
-
),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
15 15 1516 16 16,
=
×
,
=
;
(3)2.5-(0.65+0.35÷
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
,
=0.9-
+
,
=
-(
-
),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
2 2 23 3 3×
,
=
;
(3)2.5-(0.65+0.35÷
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
,
=0.9-
+
,
=
-(
-
),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
15 15 1516 16 16,
=
;
(3)2.5-(0.65+0.35÷
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
,
=0.9-
+
,
=
-(
-
),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
5 5 58 8 8;
(3)2.5-(0.65+0.35÷
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
,
=0.9-
+
,
=
-(
-
),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
5 5 512 12 12),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
,
=0.9-
+
,
=
-(
-
),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1 1 16 6 6,
=0.9-
+
,
=
-(
-
),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
5 5 56 6 6+
,
=
-(
-
),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1 1 16 6 6,
=
-(
-
),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
9 9 910 10 10-(
-
),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
5 5 56 6 6-
),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1 1 16 6 6),
=
-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
9 9 910 10 10-
,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
2 2 23 3 3,
=
;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
7 7 730 30 30;
(5)3-
÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
6 6 67 7 7÷(
-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
4 4 45 5 5-0.38),
=3-
÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
6 6 67 7 7÷
,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
21 21 2150 50 50,
=3-
,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
100 100 10049 49 49,
=
;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
47 47 4749 49 49;
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
=201-184.6,
=16.4;
(2)(1-
1 |
22 |
1 |
32 |
1 |
42 |
=(1-
1 |
4 |
1 |
9 |
1 |
16 |
=
3 |
4 |
8 |
9 |
15 |
16 |
=
2 |
3 |
15 |
16 |
=
5 |
8 |
(3)2.5-(0.65+0.35÷
5 |
12 |
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
1 |
6 |
=0.9-
5 |
6 |
1 |
6 |
=
9 |
10 |
5 |
6 |
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1 |
22 |
1 |
32 |
1 |
42 |
=(1-
1 |
4 |
1 |
9 |
1 |
16 |
=
3 |
4 |
8 |
9 |
15 |
16 |
=
2 |
3 |
15 |
16 |
=
5 |
8 |
(3)2.5-(0.65+0.35÷
5 |
12 |
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
1 |
6 |
=0.9-
5 |
6 |
1 |
6 |
=
9 |
10 |
5 |
6 |
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1 |
32 |
1 |
42 |
=(1-
1 |
4 |
1 |
9 |
1 |
16 |
=
3 |
4 |
8 |
9 |
15 |
16 |
=
2 |
3 |
15 |
16 |
=
5 |
8 |
(3)2.5-(0.65+0.35÷
5 |
12 |
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
1 |
6 |
=0.9-
5 |
6 |
1 |
6 |
=
9 |
10 |
5 |
6 |
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1 |
42 |
=(1-
1 |
4 |
1 |
9 |
1 |
16 |
=
3 |
4 |
8 |
9 |
15 |
16 |
=
2 |
3 |
15 |
16 |
=
5 |
8 |
(3)2.5-(0.65+0.35÷
5 |
12 |
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
1 |
6 |
=0.9-
5 |
6 |
1 |
6 |
=
9 |
10 |
5 |
6 |
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1 |
4 |
1 |
9 |
1 |
16 |
=
3 |
4 |
8 |
9 |
15 |
16 |
=
2 |
3 |
15 |
16 |
=
5 |
8 |
(3)2.5-(0.65+0.35÷
5 |
12 |
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
1 |
6 |
=0.9-
5 |
6 |
1 |
6 |
=
9 |
10 |
5 |
6 |
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1 |
9 |
1 |
16 |
=
3 |
4 |
8 |
9 |
15 |
16 |
=
2 |
3 |
15 |
16 |
=
5 |
8 |
(3)2.5-(0.65+0.35÷
5 |
12 |
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
1 |
6 |
=0.9-
5 |
6 |
1 |
6 |
=
9 |
10 |
5 |
6 |
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1 |
16 |
=
3 |
4 |
8 |
9 |
15 |
16 |
=
2 |
3 |
15 |
16 |
=
5 |
8 |
(3)2.5-(0.65+0.35÷
5 |
12 |
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
1 |
6 |
=0.9-
5 |
6 |
1 |
6 |
=
9 |
10 |
5 |
6 |
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
3 |
4 |
8 |
9 |
15 |
16 |
=
2 |
3 |
15 |
16 |
=
5 |
8 |
(3)2.5-(0.65+0.35÷
5 |
12 |
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
1 |
6 |
=0.9-
5 |
6 |
1 |
6 |
=
9 |
10 |
5 |
6 |
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
8 |
9 |
15 |
16 |
=
2 |
3 |
15 |
16 |
=
5 |
8 |
(3)2.5-(0.65+0.35÷
5 |
12 |
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
1 |
6 |
=0.9-
5 |
6 |
1 |
6 |
=
9 |
10 |
5 |
6 |
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
15 |
16 |
=
2 |
3 |
15 |
16 |
=
5 |
8 |
(3)2.5-(0.65+0.35÷
5 |
12 |
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
1 |
6 |
=0.9-
5 |
6 |
1 |
6 |
=
9 |
10 |
5 |
6 |
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
2 |
3 |
15 |
16 |
=
5 |
8 |
(3)2.5-(0.65+0.35÷
5 |
12 |
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
1 |
6 |
=0.9-
5 |
6 |
1 |
6 |
=
9 |
10 |
5 |
6 |
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
15 |
16 |
=
5 |
8 |
(3)2.5-(0.65+0.35÷
5 |
12 |
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
1 |
6 |
=0.9-
5 |
6 |
1 |
6 |
=
9 |
10 |
5 |
6 |
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
5 |
8 |
(3)2.5-(0.65+0.35÷
5 |
12 |
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
1 |
6 |
=0.9-
5 |
6 |
1 |
6 |
=
9 |
10 |
5 |
6 |
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
5 |
12 |
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;
(4)0.9-75÷90+
1 |
6 |
=0.9-
5 |
6 |
1 |
6 |
=
9 |
10 |
5 |
6 |
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1 |
6 |
=0.9-
5 |
6 |
1 |
6 |
=
9 |
10 |
5 |
6 |
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
5 |
6 |
1 |
6 |
=
9 |
10 |
5 |
6 |
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1 |
6 |
=
9 |
10 |
5 |
6 |
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
9 |
10 |
5 |
6 |
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
5 |
6 |
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1 |
6 |
=
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
9 |
10 |
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
2 |
3 |
=
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
7 |
30 |
(5)3-
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
6 |
7 |
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
4 |
5 |
=3-
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
6 |
7 |
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
21 |
50 |
=3-
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
100 |
49 |
=
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
47 |
49 |
(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
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