题目内容
简便计算.
|
4×0.8×2.5×1.25 | 117×12+83×12. |
(1)
+
+
+
+8,
=(
+
)+(
+
)+8,
=1+1+8,
=10;
(2)4×0.8×2.5×1.25,
=(4×2.5)×(0.8×1.25),
=10×1,
=10;
(3)117×12+83×12,
=(117+83)×12,
=200×12,
=2400.
| 5 |
| 8 |
| 1 |
| 3 |
| 3 |
| 8 |
| 2 |
| 3 |
=(
| 5 |
| 8 |
| 3 |
| 8 |
| 1 |
| 3 |
| 2 |
| 3 |
=1+1+8,
=10;
(2)4×0.8×2.5×1.25,
=(4×2.5)×(0.8×1.25),
=10×1,
=10;
(3)117×12+83×12,
=(117+83)×12,
=200×12,
=2400.
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