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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

来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/07/16 18:11:11
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