Adding Doubles+1, 10 to 80 (Horizontal Questions - Half Page x 2)

This basic Adding Doubles plus one worksheet is designed to help kids practice adding doubles+1, for numbers 10 through 80 with addition questions that change each time you visit. This math worksheet is printable and displays two half page math sheets with Horizontal Addition questions.

With this math sheet generator, you can easily create Adding Doubles+1 worksheets that are never the same and always different, providing you with an unlimited supply of math sheets to use in the classroom or at home.

Each math sheet also has an optional answer key checkbox that you can select, if you wish to print an answer key to go along with your math worksheet. And there are six different question styles to choose from, as listed below.

Possible Questions:

The possible addition questions on this math worksheet are:

  • 10+11, 11+12, 12+13, 13+14, 14+15, 15+16, ... 79+80
  • 11+10, 12+11, 13+12, 14+13, 15+14, 16+15, ... 80+79
ANSWER KEY
19 + 20 =
 39
44 + 45 =
 89
53 + 52 =
 105
79 + 78 =
 157
78 + 79 =
 157
60 + 61 =
 121
21 + 20 =
 41
55 + 56 =
 111
15 + 14 =
 29
28 + 27 =
 55
48 + 49 =
 97
21 + 22 =
 43
21 + 22 =
 43
55 + 56 =
 111
68 + 67 =
 135
34 + 33 =
 67
46 + 45 =
 91
27 + 26 =
 53
32 + 33 =
 65
49 + 48 =
 97
67 + 66 =
 133
48 + 47 =
 95
56 + 57 =
 113
71 + 72 =
 143
56 + 57 =
 113
50 + 51 =
 101
65 + 64 =
 129
80 + 79 =
 159
75 + 76 =
 151
23 + 24 =
 47
14 + 13 =
 27
51 + 52 =
 103
51 + 52 =
 103
57 + 58 =
 115
65 + 64 =
 129
50 + 51 =
 101
45 + 44 =
 89
20 + 19 =
 39
13 + 14 =
 27
60 + 59 =
 119
65 + 64 =
 129
25 + 24 =
 49
39 + 40 =
 79
10 + 11 =
 21
69 + 70 =
 139
48 + 49 =
 97
16 + 15 =
 31
54 + 53 =
 107
32 + 31 =
 63
31 + 30 =
 61
57 + 58 =
 115
73 + 74 =
 147
42 + 43 =
 85
32 + 33 =
 65
52 + 51 =
 103
18 + 17 =
 35

 Check this box to display the answer key

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