题目内容
计算下列各题、能简便的要简便计算
(1)3.2×1.25+4.8×1
| (2)(15-14×
| ||||||||
| (3)28.2×44.54+4.454×718 | (4)
|
(1)3.2×1.25+4.8×1
| 1 |
| 4 |
=3.2×1.25+4.8×1.25,
=(3.2+4.8)×1.25,
=8×1.25,
=10;
(2)(15-14×
| 4 |
| 7 |
| 8 |
| 21 |
=(15-8)×
| 8 |
| 21 |
=7×
| 8 |
| 21 |
=
| 8 |
| 3 |
(3)28.2×44.54+4.454×718,
=28.2×44.54+44.54×71.8,
=(28.2+71.8)×44.54,
=100×44.54,
=4454;
(4)
| 8 |
| 15 |
| 5 |
| 16 |
| 5 |
| 27 |
| 10 |
| 9 |
=
| 1 |
| 6 |
| 1 |
| 6 |
=
| 1 |
| 3 |
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