8.02+9.8×6.25-6.25÷2.5简便算法
问题描述:
8.02+9.8×6.25-6.25÷2.5简便算法
答
8.02+9.8×6.25-6.25÷2.5
=8.02+9.8*6.25-6.25*0.4
=8.02+6.25*(9.8-0.4)
=8.02+6.25*9.4
=8.02+6.25*(10-0.6)
=8.25+62.5-3.75
=(8+62-3)+(0.25+0.5-0.75)
=67
答
8.02+9.8×6.25-6.25÷2.5
=8.02+6.25*(9.8-0.4)
=8.02+6.25*(10-0.6)
=8.02+62.5-3.75
=70.52-3.75
=66.77
答
=8.02+9.8*6.25-6.25*0.4
=8.02+6.25*(9.8-0.4)
=8.02+6.25*9.4
=8.02+58.75
=66.77