9. Запиши решение каждого примера подробно по образцу. 1) 35 + 26 = 61 55 35 + 20 + 6 = 61 2) 35 – 26 = 9 15 35 – 20 – 6 = 9

29 + 14 = 29 + (1 + 13) = (29 + 1) + 13 = 30 + 13 = 43

18 + 25 = 18 + (2 + 23) = (18 + 2) + 23 = 20 + 23 = 43

36 + 16 = 36 + (4 + 12) = (36 + 4) + 12 = 40 + 12 = 52

45 + 29 = 45 + (5 + 24) = (45 + 5) + 24 = 50 + 24 = 74

57 + 37 = 57 + (3 + 34) = (57 + 3) + 34 = 60 + 34 = 94

69 + 24 = 69 + (1 + 23) = (69 + 1) + 23 = 70 + 23 = 93

38 + 45 = 38 + (2 + 43) = (38 + 2) + 43 = 40 + 43 = 83

74 + 17 = 74 + (6 + 11) = (74 + 6) + 11 = 80 + 11 = 91

29 + 39 = 29 + (1 + 38) = (29 + 1) + 38 = 30 + 38 = 68

31 – 15 = 31 – (1 + 14) = (31 – 1) – 14 = 30 – 14 = 16

41 – 16 = 41 – (1 + 15) = (41 – 1) – 15 = 40 – 15 = 25

53 – 24 = 53 – (3 + 21) = (53 – 3) – 21 = 50 – 21 = 29

61 – 35 = 61 – (1 + 34) = (61 – 1) – 34 = 60 – 34 = 26

74 – 27 = 74 – (4 + 23) = (74 – 4) – 23 = 70 – 23 = 47

82 – 44 = 82 – (2 + 42) = (82 – 2) – 42 = 80 – 42 = 38

95 – 56 = 95 – (5 + 51) = (95 – 5) – 51 = 90 – 51 = 39

41 – 37 = 41 – (1 + 36) = (41 – 1) – 36 = 40 – 36 = 4

74 – 68 = 74 – (4 + 64) = (74 – 4) – 64 = 70 – 64 = 6