题目内容
| 选择合适的方法计算. 1.25×25×4×8 |
44×1.6-0.16×40 | ||||||||||||
| 8.5-(5.6+4.8)÷1.3 |
| ||||||||||||
165×
|
(
|
(1)1.25×25×4×8,
=(1.25×8)×(25×4),
=10×100,
=1000;
(2)44×1.6-0.16×40,
=44×1.6-1.6×4,
=(44-4)×1.6,
=40×1.6,
=64;
(3)8.5-(5.6+4.8)÷1.3,
=8.5-10.4÷1.3,
=8.5-8,
=0.5;
(4)
| 3 |
| 7 |
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| 2 |
| 3 |
| 2 |
| 15 |
=
| 3 |
| 7 |
| 2 |
| 15 |
| 2 |
| 15 |
=
| 3 |
| 7 |
| 2 |
| 15 |
| 2 |
| 15 |
=
| 3 |
| 7 |
=
| 3 |
| 7 |
(5)165×
| 4 |
| 7 |
| 3 |
| 7 |
=165×(
| 4 |
| 7 |
| 3 |
| 7 |
=165×1,
=165;
(6)(
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| 1 |
| 4 |
| 7 |
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| 7 |
| 10 |
=
| 21 |
| 20 |
| 7 |
| 3 |
| 7 |
| 10 |
=
| 9 |
| 20 |
| 7 |
| 10 |
=
| 23 |
| 20 |
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