Question

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Answer 1

РЕШЕНИЕ:

1) 25×39/35×13 = 5×3/7×1 = 15/7 = 2 1/7

2) 7×12/30×21 = 1×2/5×3 = 2/15

3) 14×7 - 14×5/21×7 - 21×5 = 98 - 60/147 - 105 = 38/42 = 19/21

4) 24×2 + 24×6/60×6 - 60×2 = 48 + 144/360 - 120 = 192/240 = 96/120 = 48/60 = 24/30 = 12/15 = 4/5 = 0,8

ОТВЕТ:

1) 2 1/7

2) 2/15

3) 19/21

4) 0,8 или 4/5