计算：14/15×(5/14+5/21)+2/3

来源：学生作业帮助网编辑：作业帮时间：2024/05/10 16:23:00

计算：14/15×(5/14+5/21)+2/3
计算：14/15×(5/14+5/21)+2/3

计算：14/15×(5/14+5/21)+2/3
14/15×(5/14+5/21)+2/3
=14/15×5/14+14/15×5/21+2/3
=1/3+2/9+2/3
=1又2/9

=14/15×5/14+14/15×5/21+2/3
=1/3+2/3+2/9
=1又2/9

14/15×(5/14+5/21)+2/3
=14/15×5/14+14/15×5/21+2/3
=1/3+2/3+2/9
=1又2/9

14/15×(5/14+5/21)+2/3
=
14/15×5/14+14/15×5/21+2/3
=1/3+2/3+2/9
=1又2/9

等于77/3

11/9

原式=14/15×(15/42+10/42)+2/3=14/15×25/42+2/3=(14×25)/(15×42)+2/3
=(2×5)/(3×6)+2/3=5/9+6/9=11/9

=14/15X5/14+14/15X5/21+2/3=11/9