题目内容
用你喜欢的方法计算
| (1)6.54×101 | (2)0.25×0.97×40 |
| (3)45.3×101-45.3 | (4)0.89×4.8+0.89×5.2. |
(1)6.54×101,
=6.54×(100+1),
=6.54×100+6.54×1,
=654+6.54
=660.54;
(2)0.25×0.97×40,
=(0.25×40)×0.97,
=10×0.97,
=9.7;
(3)45.3×101-45.3,
=45.3×(101-1),
=45.3×100,
=4530;
(4)0.89×4.8+0.89×5.2,
=0.89×(4.8+5.2),
=0.89×10,
=8.9.
=6.54×(100+1),
=6.54×100+6.54×1,
=654+6.54
=660.54;
(2)0.25×0.97×40,
=(0.25×40)×0.97,
=10×0.97,
=9.7;
(3)45.3×101-45.3,
=45.3×(101-1),
=45.3×100,
=4530;
(4)0.89×4.8+0.89×5.2,
=0.89×(4.8+5.2),
=0.89×10,
=8.9.
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