1.83/8×7/11+7/8×5/112.1×2×3+7×14×21/1×3×5+7×21×35

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/25 13:08:54
1.83/8×7/11+7/8×5/112.1×2×3+7×14×21/1×3×5+7×21×351.83/8×7/11+7/8×5/112.1×2×3+7×14×21/1×3×5+7×21×351.

1.83/8×7/11+7/8×5/112.1×2×3+7×14×21/1×3×5+7×21×35
1.83/8×7/11+7/8×5/11
2.1×2×3+7×14×21/1×3×5+7×21×35

1.83/8×7/11+7/8×5/112.1×2×3+7×14×21/1×3×5+7×21×35
1.83/8×7/11+7/8×5/11
=83/11×7/8+7/8×5/11
=7/8×(83/11+5/11)
=7/8×8
=7
2.1×2×3+7×14×21/1×3×5+7×21×35
=1×2×3+7×(1×2×3)/1×3×5+7×(1×3×5)
=1×2×3×(1+7)/1×3×5×(1+7)
=1×2×3/1×3×5
=2/5