用简便方法计算3点82乘9点9加0点382怎么做
用简便方法计算3点82乘9点9加0点382怎么做
=3.82x9.9+3.82x0.1
=3.82x(9.9+0.1)
=3.82x10
=38.2
2点74乘9点5加5乘0点274用简便方法计算
2.74*9.5+5*0.274
=2.74*9.5+2.74*0.5
=2.74*(9.5+0.5)
=2.74*10
=27.4
9点9乘5点5++用简便方法怎么计算
答案 9.9*5.5=10*5.5-0.1*5.5=55-0.55=54.45
用简便方法计算:32乘10分之9加10分之9加67乘0点9
32乘10分之9加10分之9加67乘0点9
=10分之9x(32+67+1)
=10分之9x100
=90
用简便方法计算57点9×0点9+5点799
原式
=57.9x0.9+5.799
=57.9x0.9+5.79+0.009
=57.9x0.9+57.9x0.1+0.009
=57.9x(0.9+0.1)+0.009
=57.9x1+0.009
=57.9+0.009
=57.909
供参考。
用简便方法计算57点9×0点9+5点79
解:
57.9*0.9+5.79
=57.9*0.9+5.79*1
=5.79*9+5.79*1
=5.79*(9+1)
=5.79*10
=57.9
82乘33+加9乘66用简便方法计算
82x33+9x66
=82x33+9x2x33
=33x(82+18)
=33x100
=3300
简便方法计算9.9×9点9+0点99
原式
=9.9x9.9+0.99
=9.9x9.9+9.9x0.1
=9.9x(9.9+0.1)
=9.9x10
=99
供参考。
3点4成99加99成0点6 用简便方法计算怎么做
3.4×99+99×0.6
=99×(3.4+0.6)
=99×4
=(100-1)×4
=400-4
=396