4⼀9×7⼀8×1又2⼀7简便计算

4/9×7/8×1又2/7简便计算
2025-04-03 15:45:19
推荐回答(3个)
回答1:

回答2:

4/9x7/8x1又2/7
=4/9x7/8x9/7
=4/9x9/8
=4/8
=1/2

回答3:

=4/9×7/8×9/7
=1/2