分数超难的简算
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/06/23 12:56:41
分数超难的简算
=(7/9-2/9)+(3/10+17/10)
=5/9+2
=2又5/9
=1/4+2/4×3/5+3/5
=1/4+(2/4+1)×3/5
=1/4+3/2×3/5
=1/4+9/10
=23/20
=5/9+2
=2又5/9
=1/4+2/4×3/5+3/5
=1/4+(2/4+1)×3/5
=1/4+3/2×3/5
=1/4+9/10
=23/20