求0.96×101 3.69×9+3.69 2.14×1.25×0.8 2.5×3.2的简便计算结合脱式运算

问题描述:

求0.96×101 3.69×9+3.69 2.14×1.25×0.8 2.5×3.2的简便计算结合脱式运算

  0.96×101
  =0.96×(100+1)
  =0.96×100+0.96×1
  =96.96
  3.69×9+3.69
  =3.69×(9+1)
  =3.69×10
  =36.9
  2.14×1.25×0.8
  =2.14×(1.25×0.8)
  =2.14×1
  =2.14
  2.5×3.2
  =2.5×4×0.8
  =10×0.8
  =8