найдите сумму 1) -7+(-8) 2)-0,38+(-0,74) 3) -1,8+(-0,34)
выполнить сложение
1)-10+7
2)-4,6+6,3
3)13,8+(-5,2)
4)7,14+(-12,4)
5)-4,8+4,8
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