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Математика 2 класс М.И.Моро, М.А,Бантова, Г.В.Бельтюкова, С.И.Волкова, С.В.Степанова

ГДЗ учебник по математике 2 класс М.И.Моро, М.А,Бантова, Г.В.Бельтюкова, С.И.Волкова, С.В.Степанова

авторы: , , , , , .
издательство: "Просвещение" 2014

Раздел:

Номер №16

42 + 18
24 + 36
59 + 18
32 + 49
9961
6655
6344
9817
17 + 71
23 + 32
43 + 38
74 + 26
9873
8937
5342
8883

Решение

42 + 18 = (40 + 10) + (2 + 8) = 50 + 10 = 60
+ 42 18 60

 
24 + 36 = (20 + 30) + (4 + 6) = 50 + 10 = 60
+ 24 36 60

 
59 + 18 = (50 + 10) + (9 + 8) = 60 + (9 + 1 + 7) = 60 + (10 + 7) = 60 + 10 + 7 = 70 + 7 = 77
+ 59 18 77

 
32 + 49 = (30 + 40) + (2 + 9) = 70 + (1 + 1 + 9) = 70 + (1 + 10) = 70 + 10 + 1 = 80 + 1 = 81
+ 32 49 81

 
9961 = (90 + 9) − (60 + 1) = (9060) + (91) = 30 + 8 = 38
- 99 61 38

 
6655 = (60 + 6) − (50 + 5) = (6050) + (65) = 10 + 1 = 11
- 66 55 11

 
6344 = (50 + 13) − (40 + 4) = (5040) + (134) = 10 + 9 = 19
- 63 44 19

 
9817 = (90 + 8) − (10 + 7) = (9010) + (87) = 80 + 1 = 81
- 98 17 81

 
17 + 71 = (10 + 70) + (7 + 1) = 80 + 8 = 88
+ 17 71 88

 
23 + 32 = (20 + 30) + (3 + 2) = 50 + 5 = 55
+ 23 32 55

 
43 + 38 = (40 + 30) + (3 + 8) = 70 + 11 = 70 + 10 + 1 = 80 + 1 = 81
+ 43 38 81

 
74 + 26 = (70 + 20) + (4 + 6) = 90 + 10 = 100
+ 74 26 100

 
9873 = (90 + 8) − (70 + 3) = (9070) + (83) = 20 + 5 = 25
- 98 73 25

 
8937 = (80 + 9) − (30 + 7) = (8030) + (97) = 50 + 2 = 52
- 89 37 52

 
5342 = (50 + 3) − (40 + 2) = (5040) + (32) = 10 + 1 = 11
- 53 42 11

 
8883 = (80 + 8) − (80 + 3) = (8080) + (83) = 0 + 5 = 5
- 88 83 5