题目内容
【题目】简便方法计算我很快.
(1)101×0.36
(2)5.8×7.3+4.2×7.3
(3)25×0.77×0.4
(4)4.75×99+4.75
【答案】(1)36.36 (2)73 (3)7.7 (4)475
【解析】
(1)101×0.36
=(100+1)×0.36
=100×0.36+1×0.36
=36+0.36
=36.36
(2)5.8×7.3+4.2×7.3
=(5.8+4.2)×7.3
=10×7.3
=73
(3)25×0.77×0.4
=25×0.4×0.77
=10×0.77
=7.7
(4)4.75×99+4.75
=4.75×(99+1)
=4.75×100
=475
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