найдите сумму удобным для вас способом и сократите полученную дробь
а) 3/30 + 3/30 +7/30 +2/30 б) 5/42 + 5 /42 + 6/42 + 1 /42 +4/42
а) 3/30 + 3/30 +7/30 +2/30 б) 5/42 + 5 /42 + 6/42 + 1 /42 +4/42
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а) 3/30 + 3/30 +7/30 +2/30 = (3+7+3+2) / 30 = 15/30 = 1/2б) 5/42 + 5 /42 + 6/42 + 1 /42 +4/42 = (5+5+6+4+1) / 42 = 21/42 = 1/2
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