Реши Какое свойство сложения поможет тебе быстро решить примеры ?
а) 2+ 7 = 7 + 2 =
г) 1 + 8 = 8 + 1 =
ж) 3 + 6 = 6+ 3 =
б) 2 + 8 = 8 + 2 =
д) 2 + 6 = 6+ 2 =
е) 1 + 7 = 7 + 1 =
в) 1 + 9 = 9 + 1 =
e) 4 + 6 = 6+ 4 =
и) 3 + 5 = 5 + 3 =​
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