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24.01.2020 01:07 •  Математика

б) 1 1/5 x 3 + 4/5 x 3 =
в) 2 4/5 x 3 – 4/5 x 3 =
г) 2 4/5 x 5/9 + 6 1/5 x 5/9 =
д) 2 4/5 x 5/8 - 1 1/5 x 5/8 =
е) 3 1/5 x 8/11 + 3 1/5 x 3/11 =
ж) 4 2/3 x 7 1/12 - 6 1/12 x 4 2/3 =