5/7-4/8 = 1/2+ (3/7-0,45)=. Created by Carleksa. matematika-ru

7-0,45)=...

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5/7-4/8 =
1/2+ (3/7-0,45)=

Answers & Comments

Агмелова 5/7-4/8 = 40/56-28/56 = 12/56=6/28=3/14
1/2+ (3/7-0,45)= 1/2 + (3/7-45/100) = 1/2+(300/700-315/700)=1/2+(-15/700)=1/2+(-3/140)=1/2-3/140=70/140-3/140=-67/140

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