题目内容
【题目】下面各题,怎样算简便就怎样算。
(1)7.8×11-7.8
(2)1.25×3.2×0.25
(3)9.05-24.12÷3.6
(4)4.3×1.02
【答案】(1)78 (2)1 (3)2.35 (4)4.386
【解析】
(1)7.8×11-7.8
=7.8×(11-1)
=78
(2)1.25×3.2×0.25
=(1.25×8)×(0.4×0.25)
=10×0.1
=1
(3)9.05-24.12÷3.6
=9.05-6.7
=2.35
(4)4.3×1.02
=4.3×(1+0.02)
=4.3×1+4.3×0.02
=4.3+0.086
=4.386
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