Решите 3 задание Заранее спасибо!. Created by Cat1234595. matematika-ru

Решите 3 задание Заранее спасибо!...

Yanchyk5 2/3   × m = 4/7 × 4,2
m = 4/7 × 21/5 ÷ 2/3 = 4/7 × 21/5 × 3/2 = (2×3×3)/(1×5×1) = 18/5
m = 3 3/5
m = 3,6
проверим:
2/3   × 3,6 = 4/7   × 4,2
2/3   × 18/5 = 4/7   × 21/5
(2×6)/(1×5) = (4×3)/(1×5)
12/5 = 12/5
2,4=2,4

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zhenyaM2002

Verified answer

4/7×4.2=4/7×4 2/10=4/7×4
1/5=4/7×21/5=12/5
2/3м=12/5
м=12/5÷2/3=12/5×3/2=36/10=3.6
м=3.6

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