题目内容
下面各题能简便计算的要简便计算.
|
0.25×3.2×12.5 | 22×(
| ||||||||||||||||||||||
|
999
|
|
(1)
7 |
25 |
3 |
4 |
2 |
5 |
2 |
5 |
=
7 |
25 |
7 |
20 |
2 |
5 |
=
7 |
25 |
7 |
50 |
=2;
2)0.25×3.2×12.5,
=0.25×(4×0.8)×12.5,
=(0.25×4)×(0.8×12.5),
=1×1,
=1;
(3)22×(
2 |
11 |
3 |
16 |
=22×
2 |
11 |
3 |
16 |
=32+33,
=65;
(4)
9 |
35 |
8 |
11 |
3 |
35 |
9 |
11 |
=
8 |
35 |
9 |
11 |
3 |
35 |
9 |
11 |
=(
8 |
35 |
3 |
35 |
9 |
11 |
=
11 |
35 |
9 |
11 |
=
9 |
35 |
(5)999
8 |
9 |
8 |
9 |
8 |
9 |
=999
8 |
9 |
8 |
9 |
8 |
9 |
1 |
9 |
1 |
9 |
1 |
9 |
1 |
3 |
=(999
8 |
9 |
1 |
9 |
8 |
9 |
1 |
9 |
8 |
9 |
1 |
9 |
1 |
3 |
=1000+100+10-
1 |
3 |
=1110-
1 |
3 |
=1109
2 |
3 |
(6)
1 |
10 |
1 |
40 |
1 |
88 |
1 |
154 |
=
1 |
2×5 |
1 |
5×8 |
1 |
8×11 |
1 |
11×14 |
=
1 |
3 |
1 |
2 |
1 |
5 |
1 |
5 |
1 |
8 |
1 |
8 |
1 |
11 |
1 |
11 |
1 |
14 |
=
1 |
3 |
1 |
2 |
1 |
5 |
1 |
5 |
1 |
8 |
1 |
8 |
1 |
11 |
1 |
11 |
1 |
14 |
=
1 |
3 |
1 |
2 |
1 |
14 |
=
1 |
3 |
3 |
7 |
=
1 |
7 |
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相关题目
下面各题能简便计算的要简便计算.
÷[(-)×] | 0.25×3.2×12.5 | 22×(+)×8 |
×+× | 999+99+9 | +++. |