题目内容
计算下面各题,能简算的要简算.
| 0.25×1.25×32 | 3.6-2.8+7.4-7.2 | 41×101. |
①
÷23+
×
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
②0.25×1.25×32,
=0.25×1.25×8×4,
=(0.25×4)×(1.25×8),
=1×10,
=10;
③3.6-2.8+7.4-7.2,
=3.6+7.4-(2.8+7.2),
=11-10,
=1;
④41×101,
=41×(100+1),
=41×100+41×1,
=4100+41,
=4141.
| 8 |
| 17 |
| 1 |
| 23 |
| 9 |
| 17 |
=
| 8 |
| 17 |
| 1 |
| 23 |
| 1 |
| 23 |
| 9 |
| 17 |
=(
| 8 |
| 17 |
| 9 |
| 17 |
| 1 |
| 23 |
=1×
| 1 |
| 23 |
=
| 1 |
| 23 |
②0.25×1.25×32,
=0.25×1.25×8×4,
=(0.25×4)×(1.25×8),
=1×10,
=10;
③3.6-2.8+7.4-7.2,
=3.6+7.4-(2.8+7.2),
=11-10,
=1;
④41×101,
=41×(100+1),
=41×100+41×1,
=4100+41,
=4141.
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