五年级上册数学 （四升五）小数乘除法
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简介
9.16×2.5-0.5×9.16 =9.16×(2.5-0.5) =9.16×2 =18.32 1.78×99+1.782 =1.78×(99+1) =1.78×100 =178 6.3×3.6+3.6×3.7 =3.6×(3.7+6.3) =3.6×10 =36 6.8×9.9 =6.8×(10-0.1) =6.8×10-6.8×0.1 =68-0.68 =67.32
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