1-8⼀9*2⼀7+5⼀7*3⼀7 = 一减九分之八乘以七分之二加七分之五乘以七分之三等于多少

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2025-04-03 16:03:31
推荐回答(3个)
回答1:

464/441

回答2:

454/441

回答3:

1-8/9*2/7+5/7*3/7

=1- 16/63 + 15/49
=1- (7/63 +9/63) +15/49
=1- 1/9 - 1/7 + 15/49
=8/9 + 8/49
=8*(1/9+1/49)
=8* 58/441
=464/441
=1又23/441