题目内容
| 计算,能简算的要简算. ①36×101 | ②239×7.2+956×8.2 | ||||||
③24×(
| ④3.7×0.58+6.3×0.58. |
①36×101,
=36×(100+1),
=36×100+36×1,
=3600+36,
=3636;
②239×7.2+956×8.2,
=239×7.2+239×32.8,
=239+(7.2+32.8),
=239×40,
=9560;
③24×(
+
+
),
=24×
+24×
+24×
,
=6+4+2,
=12;
④3.7×0.58+6.3×0.58.
=(3.7+6.3)×0.58,
=10×0.58,
=5.8.
=36×(100+1),
=36×100+36×1,
=3600+36,
=3636;
②239×7.2+956×8.2,
=239×7.2+239×32.8,
=239+(7.2+32.8),
=239×40,
=9560;
③24×(
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 12 |
=24×
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 12 |
=6+4+2,
=12;
④3.7×0.58+6.3×0.58.
=(3.7+6.3)×0.58,
=10×0.58,
=5.8.
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