作业帮求这几道简便计算题的做法!
来源：学生作业帮 编辑：作业帮 分类：数学作业 时间：2024/05/25 10:41:53
求这几道简便计算题的做法!
5.555×5.2
2.22×3.33
7.658×85
36.02×0.3
56.78×8
5.555×5.2
2.22×3.33
7.658×85
36.02×0.3
56.78×8
5.555×5.2=1.111×5×5.2=1.111×26=28.886
2.22×3.33 =1.11×2×3.33=(1+0.1+0.01)×6.66=6.66+0.666+0.0666=7.3926
7.658×85=7.658×(100-10-5)=765.8-76.58-38.29=650.93
36.02×0.3=(30+6+0.02)×0.3=9+1.8+0.006=10.806
56.78×8=56.78×(10-2)=567.8-113.56=454.24
2.22×3.33 =1.11×2×3.33=(1+0.1+0.01)×6.66=6.66+0.666+0.0666=7.3926
7.658×85=7.658×(100-10-5)=765.8-76.58-38.29=650.93
36.02×0.3=(30+6+0.02)×0.3=9+1.8+0.006=10.806
56.78×8=56.78×(10-2)=567.8-113.56=454.24