Дроби (3/8+5/24) + 7/60; (5/42+4/35) + (1/2+4/15) ; 23/75 + (4/25+8/15) + 8/91

Question

Математика

Витаха

13 июля, 04:15

Дроби (3/8+5/24) + 7/60; (5/42+4/35) + (1/2+4/15) ; 23/75 + (4/25+8/15) + 8/91

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Ефрем · Answer 1

(3/8+5/24) + 7/60 = (9+5) / 24+7/60=

=14/24+7/60=7/12+7/60 = (35+7) / 60=

=42/60=7/10

(5/42+4/35) + (1/2+4/15) = (25+24) / 210 + (15+8) / 30=

=49/210+23/30 = (49+161) / / 210=210/210=1

23/75 + (4/25+8/15) + 8/91=23/75 + (12+40) 75+8/91=23/75+52/75+8/91 = (23+52) / 75+8/91=

=75/75+8/91=1+8/91=1 8/91