5.4×9.9 1.2×5.4-5.4的简便计算
3个回答
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5.4×9.9 +1.2×5.4-5.4
=5.4x(9.9+1.2-1)
=5.4x(1+0.1)
=5.4+0.54
=5.94
=5.4x(9.9+1.2-1)
=5.4x(1+0.1)
=5.4+0.54
=5.94
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展开全部
5.4*9.9
=5.4*10-5.4*0.1
=54-0.54
=53.46
1.2*5.4-5.4
=5.4*(1.2-1)
=5.4*0.2
=1.08
=5.4*10-5.4*0.1
=54-0.54
=53.46
1.2*5.4-5.4
=5.4*(1.2-1)
=5.4*0.2
=1.08
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