7⼀8+1⼀8×4⼀5简便计算

2025-05-13 12:25:42
推荐回答(4个)
回答(1):

你好,先提取1/8再做,1/8(7+4/5)=1/8*39/5=39/40

回答(2):

7/8+1/8×4/5

=7/8+1/8×(1-1/5)
=7/8+1/8×1-1/8×1/5

=1-1/40
=39/40

回答(3):

7/8+1/8×4/5
=1/8(7+4/5)
=1/8x39/5
39/40

回答(4):

7/8+4/40
35/40+4/40
39/40