题目内容
用你喜欢的方法计算
| 12.5×32×0.8 |
|
2.5×[(3.2+1.8)÷0.25] | 6.4×0.09+0.01×6.4. |
①12.5×32×0.8,
=(12.5×8)×(4×0.8),
=100×3.2,
=320;
②
-
+
,
=
-
+
,
=
;
③2.5×[(3.2+1.8)÷0.25],
=2.5×[5÷0.25],
=2.5×20,
=50;
④6.4×0.09+0.01×6.4
=6.4×(0.09+0.01),
=6.4×0.1,
=0.64.
=(12.5×8)×(4×0.8),
=100×3.2,
=320;
②
| 4 |
| 9 |
| 3 |
| 10 |
| 1 |
| 3 |
=
| 40 |
| 90 |
| 27 |
| 90 |
| 30 |
| 90 |
=
| 43 |
| 90 |
③2.5×[(3.2+1.8)÷0.25],
=2.5×[5÷0.25],
=2.5×20,
=50;
④6.4×0.09+0.01×6.4
=6.4×(0.09+0.01),
=6.4×0.1,
=0.64.
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