Question

9. Сложите по группам:

34+17+6=(34+6)+17

2+23+8

42+27+18

8+25+12+9​

Answer 1

Ответ:

34 + 17 + 6 = (34 + 6) + 17 = 40 + 17 = 57

2 + 23 + 8 = (2 + 8) + 23 = 10 + 23 = 33

42 + 27 + 18 = (42 + 18) + 27 = 60 + 27 = 87

8 + 25 + 12 + 9​ = (8 + 12) + 25 + (5 + 4) = (8 + 12) + (25 + 5) + 4 =

= 20 + 30 + 4 = 54