题目内容
| 递等式计算.(能简算的要简算,并写出主要的简算过程) ①1.8+3.84÷(15-12.6) | ②8×(
| ||||||
③
| ④0.4×80×2.5×0.125. |
①1.8+3.84÷(15-12.6),
=1.8+3.84÷2.4,
=1.8+1.6,
=3.4;
②8×(
| 1 |
| 18 |
| 5 |
| 8 |
=8×
| 1 |
| 18 |
| 5 |
| 8 |
=
| 4 |
| 9 |
=5
| 4 |
| 9 |
③
| 5 |
| 8 |
| 5 |
| 6 |
| 3 |
| 4 |
=
| 5 |
| 8 |
| 1 |
| 12 |
=
| 5 |
| 8 |
| 5 |
| 12 |
=
| 3 |
| 2 |
④0.4×80×2.5×0.125,
=(0.4×2.5)×(80×0.125),
=1×10,
=10.
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