The image contains a page with math problems, likely for elementary school students. The tasks involve basic arithmetic operations (addition and subtraction) with two-digit numbers. Some problems have circles next to them, suggesting they are meant to be solved and the answer marked or selected. There are also some lines of text in Russian related to language learning, discussing root words, vowels, and stress. The page is numbered '53' at the bottom. Identify the math problems presented in the image. List each problem and its corresponding number if available.

Math Problems:

• 45 - 26
• 65 - 26
• 98 - 34
• 88 - 59
• 53 + 36
• 38 + 42
• 81 - 38
• 82 - 16
• 37 - 17
• 32 + 26
• 56 + 37
• 72 - 40
• 28 + 54
• 54 - 17
• 100 - 78
• 24 + 33
• 30 + 70
• 73 - 55
• 86 - 68
• 65 - 34
• 58 - 12
• 47 - 39
• 45 + 29
• 88 - 48
• 57 - 12
• 54 + 39
• 45 - 34
• 71 - 44
• 56 + 10
• 17 + 21
• 36 + 53
• 54 + 36
• 76 - 39
• 93 - 45
• 24 + 11
• 97 - 53
• 66 + 12
• 87 - 50
• 65 + 28
• 14 + 19
• 72 - 49
• 54 + 13
• 40 + 60
• 73 - 49
• 49 - 24
• 16 + 19
• 23 + 11
• 64 - 57
• 49 + 32
• 66 - 26
• 78 - 41
• 25 + 69
• 90 - 24
• 88 + 12
• 67 - 29
• 65 - 16
• 52 - 43
• 50 - 14
• 64 + 25
• 40 + 30
• 42 - 26
• 97 - 28
• 89 - 26
• 61 - 39
• 76 - 37
• 69 - 24
• 54 + 45
• 70 + 18
• 91 - 45
• 49 - 20
• 60 - 45
• 89 - 27
• 52 + 36
• 67 + 30
• 72 - 38
• 81 - 26
• 95 - 36
• 40 - 14
• 17 + 30
• 12 + 88
• 45 - 17
• 74 - 34
• 73 - 69
• 20 + 19
• 25 + 64
• 10 + 50
• 43 - 24
• 81 - 13
• 78 - 53
• 80 - 51
• 39 + 14
• 19 + 45
• 43 + 46
• 30 + 58
• 82 - 65
• 89 - 60
• 67 - 30
• 45 + 19
• 34 + 54
• 50 + 17
• 87 - 54
• 91 - 36
• 36 + 25
• 18 + 11