65.25/75+2.98*99的简便算法

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65.25/75+2.98*99的简便算法
65.25/75+2.98*99的简便算法

65.25/75+2.98*99的简便算法
65.25/75+2.98*99
=65.25÷5÷15+2.98*(100-1)
=13.05÷5÷3+2.98*100-2.98
=2.61÷3+298-2.98
=0.87-2.98+298
=298-2.11
=295.89

可以这样算,65.25=75-9.75
9.75=9+0.75=7.5+1.5+0.75
所以65.25÷75=(75-7,5-1.5-0.75)÷75=0.87
2.98=3-0.02所以2.98×99=(3-0.02)×100-2.98=300-2-2.98=295.02
两者相加:0.87+295.02=295.89
以上就是简便算法,希望对你的学习有所帮助

65.25/75+2.98*99
=0.87+(100-1)*2.98
=0.87+298-2.98
=298-2.11
=295.89

1/75=4/300
原式=0.6525*4*/3+2.98*(100-1)
=2.61/3+298-2.98
=0.87+295.02
=295.89