等于几,帮你个忙吧!

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等于几,帮你个忙吧!
等于几,帮你个忙吧!
 

等于几,帮你个忙吧!
第二个是7分之15

⑴-200÷(-8)
=25
⑵1又7/8÷(-7/8)
=﹣15/8×8/7
=-15/7
⑶(-24)÷(-2)÷(-1又1/5)
=12×(-5/6)
=-10
⑷ (1/6-2/7+2/3)÷(-5/42)
=(7/42-12/42+28/42)×(-42/5)
=-7/5+12/5-8/5
=-3/...

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⑴-200÷(-8)
=25
⑵1又7/8÷(-7/8)
=﹣15/8×8/7
=-15/7
⑶(-24)÷(-2)÷(-1又1/5)
=12×(-5/6)
=-10
⑷ (1/6-2/7+2/3)÷(-5/42)
=(7/42-12/42+28/42)×(-42/5)
=-7/5+12/5-8/5
=-3/5

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