Упростите: а)(1/5+1/5+1/5)×1/3 б) (2/7+2/7+2/7+2/7)×21/8

Question

Упростите: а)(1/5+1/5+1/5)×1/3 б) (2/7+2/7+2/7+2/7)×21/8

Answer 1

(1/5+1/5+1/5)*1/3=3/5*1/3=1/5
(2/7+2/7+2/7+2/7)* 21/8= 8/7*21/8=3

Answer 2

А)3/5×1/3=1/5
б)8/7×21/8=3

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Comments

ошиблась в 1 ом примере на фото..3/5×1/3=1/5... извиняюсь. .

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ниче