4⼀9×4⼀15+括号2⼀3-2⼀5括号乘以5⼀9等于多少

4/9×4/15+括号2/3-2/5括号乘以5/9等于多少
2024-12-04 20:41:21
推荐回答(1个)
回答1:

4/9×4/15+(2/3-2/5)x5/9
=4/9x4/15+4/15x5/9
=(4/9+5/9)x4/15
=1x4/15
=4/15