Сторінка 136 гдз 2 клас математика Заїка 2019

Розв'язання:

Сторінка 136
Додавання і віднімання чисел

 

✔1.
0 + 71 = 71
33 + 0 = 33
42 – 0 = 42
89 – 89 = 0
10 + 90 = 100
100 – 90 = 10


✔2.
30 + 5 = 35
35 – 5 = 30
35 – 30 = 5
43 + 1 = 44
18 + 1 = 19
19 + 1 = 20
23 + 5 = 28
57 + 2 = 59
61 + 6 = 67
42 + 20 = 62
39 + 10 = 49
63 + 20 = 83
28 – 4 = 24
44 – 3 = 41
87 – 5 = 82
45 – 20 = 25
75 – 30 = 45
99 – 80 = 19

✔3.
19 – 1 = 18
20 – 1 = 19
30 – 8 = 22
50 – 6 = 44
40 – 24 = 16
60 – 18 = 42
37 + 21 = 58
81 + 16 = 97
37 – 21 = 16
88 – 16 = 72
            13
40 – (5 + 8) = 27
            75
90 – 15 + 13 = 88


✔4.
17 – 8 + 9 = 9 + 9 = 18
14 – 7 – 6 = 7 – 6 = 1
7 + 6 – 5 = 13 – 5 = 8
16 – (8 + 2) = 16 – 10 = 6
(7 + 2) + 5 = 9 + 5 = 14


✔5.
16 – 8 – 8 = 8 – 8 = 0
12 – 9 – 3 = 3 – 3 = 0
16 – 7 – 9 = 9 – 9 = 0
8 + 8 – 16 = 16 – 16 = 0
9 + 9 – 18 = 18 – 18 = 0


✔6.
6 + 6 – 3 = 12 – 3 = 9
4 + 8 – 4 = 4 – 4 + 8 = 0 + 8 = 8
16 – 7 + 6 = 9 + 6 = 15
3 + 9 – 4 = 12 – 4 = 8
6 + 8 – 7 = 14 – 7 = 7


✔7.
(18 – 9) + 6 = 9 + 6 = 15
(8 + 7) – 6 = 15 – 6 = 9
(3 + 8) + 7 = 11 + 7 = 18
(12 – 5) – 5 = 7 – 5 = 2
3 + (12 – 4) = 3 + 8 = 11
16 – (4 + 5) = 16 – 9 = 7
9 + (8 + 1) = 9 + 9 = 18
18 – (11 – 2) = 18 – 9 = 9


✔8.
34 + 9 = 34 + 10 – 1 = 44 – 1 = 43
46 + 5 = 40 + (6 + 5) = 40 + 11 = 51
34 + 19 = 34 + 20 – 1 = 54 – 1 = 53
46 + 15 = (40 + 10) + (6 + 5) = 50 + 11 = 61
43 – 9 = 43 – 10 + 1 = 33 + 1 = 34
62 – 5 = 62 – 2 – 3 = 60 – 3 = 57
43 – 19 = 43 – 20 + 1 = 23 + 1 = 24
62 – 15 = 62 – 12 – 3 = 50 – 3 = 47
85 – (9 + 8) = 85 – 17 = 85 – 20 + 3 = 65 + 3 = 68
46 + (15 – 8) = 46 + 7 = 46 + 4 + 3 = 50 + 3 = 53


✔9.
18 – (7 + 2) = 18 – 9 = 18 – 8 – 1 = 10 – 1 = 9
38 – (5 + 4) = 38 – 9 = 38 – 8 – 1 = 30 – 1 = 29
100 – (90 – 9) = 100 – 90 + 9 = 10 + 9 = 19
100 – (70 – 7) = 100 – 70 + 7 = 30 + 7 = 37
90 – 73 + 8 = 90 + 8 – 73 = 98 – 73 = 25
84 – 58 – 7 = 84 – 54 – 4 – 7 = 30 – 4 – 7 = 19
93 – (46 + 9) = 93 – 55 = 93 – 60 + 5 = 33 + 5 = 38
54 – (42 – 7) = 54 – 35 = 54 – 34 – 1 = 20 – 1 = 19

✔10.
65 + 17 + 5 + 3 = (65 + 5) + (17 + 3) = 70 + 20 = 90
28 + 55 + 5 + 2 = (28 + 2) + (55 + 5) = 30 + 60 = 90
43 + 19 + 7 + 21 = (43 + 7) + (19 + 21) = 50 + 40 = 90
97 – (38 + 17) – 42 = 97 – 55 – 42 = 42 – 42 = 0
(52 + 13) – (13 + 52) = 65 – 65 = 0
32 + (41 – 8) + 32 = 32 + 33 + 32 = 65 + 32 = 97
27 + 12 + 28 + 13 = (27 + 13) + (12 + 28) = 40 + 40 = 80
75 + 25 – 6 – 4 = 100 – (6 + 4) = 100 – 10 = 90
47 + 13 – 20 – 40 = (47 + 13) – 20 – 40 = 60 – 20 – 40 = 40 – 40 = 0


✔11.
0 + 94 = 94
94 – 94 = 0
73 + 0 = 73
73 – 0 = 73
0 + 0 = 0
0 – 0 = 0
13 + 31 = 44
44 – 31 = 13
45 + 54 = 99
99 – 54 = 45
61 + 16 = 77
77 – 16 = 61
73 – 44 = 73 – 43 – 1 = 30 – 1 = 29
29 + 44 = 30 + 44 – 1 = 74 – 1 = 73
67 – 59 = 67 – 60 + 1 = 7 + 1 = 8
8 + 59 = 8 + 60 – 1 = 68 – 1 = 67
81 – 69 = 81 – 70 + 1 = 11 + 1 = 12
12 + 69 = 12 + 70 – 1 = 82 – 1 = 81
99 – 29 = 70
70 + 29 = 99
87 – 67 = 20
20 + 67 = 87
44 – 14 = 30
30 + 14 = 44