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×( | |
| 999 |