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An answer key is also provided to assist in self-assessment, making it an excellent tool for classroom instruction or independent home practice. 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| 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n\n1) 7 + 5 =   13) 9 – 7 =   2) 4 + 10 =   14) 11 – 3 =   3) 2 + 7 =   15) 19 – 1 =   4) 3 + 8 =   16) 14 – 4 =   5) 15 + 2 =   17) 12 – 6 =   6) 10 + 9 =   18) 17 – 2 =   7) 4 + 6 =   19) 10 – 7 =   8) 7 + 9 =   20) 13 – 4 =   9) 6 + 6 =   21) 20 – 1 =   10) 12 + 3 =   22) 18 – 4 =   11) 5 + 8 =   23) 11 – 8 =    \n12) 11 + 4 =   24) 15 – 7 =    \nCHALLENGE  \n\n| 11 | 4 | 13 | 7 | 8 |\n| --- | --- | --- | --- | --- |\n\nChoose any 3 of the numbers above to complete each of the equations.  \n\n|  | + |  | = |  |  |  | ̶ |  | = |  |  |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n|  |  |  |  |  |  |  |  |  |  |  |  |\n\nADD AND SUBTRACT WITHIN 20 SHEET 1 ANSWERS  \n\n| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n\n1) 7 + 5 =  12  13) 9 – 7 =  2   \n2) 4 + 10 =  14  14) 11 – 3 =  8   \n3) 2 + 7 =  9  15) 19 – 1 =  18   \n4) 3 + 8 =  11  16) 14 – 4 =  10   \n5) 15 + 2 =  17  17) 12 – 6 =  6   \n6) 10 + 9 =  19  18) 17 – 2 =  15   \n7) 4 + 6 =  10  19) 10 – 7 =  3   \n8) 7 + 9 =  16  20) 13 – 4 =  9   \n9) 6 + 6 =  12  21) 20 – 1 =  19   \n10) 12 + 3 =  15  22) 18 – 4 =  14   \n11) 5 + 8 =  13  23) 11 – 8 =  3   \n12) 11 + 4 =  15  24) 15 – 7 =  8   \nCHALLENGE  \n\n| 11 | 4 | 13 | 7 | 8 |\n| --- | --- | --- | --- | --- |\n\nChoose any 3 of the numbers above to complete each of the equations.  \n\n| There are two different solutions for each equation: | 7 + 4 = 11 | 11 – 4 = 7 |\n| --- | --- | --- |\n|  | 4 + 7 = 11 | 11 – 7 = 4 |","cbCaiq4elO7HtCyz","https://ap.wps.com/l/cbCaiq4elO7HtCyz","pdf",186337,"English","# Addition and Subtraction Worksheet\n## Practice Problems\n## Challenge Section\n# Answer Key\n## Answer Key for Practice Problems\n## Challenge Solutions","[{\"question\":\"What is the target age group or grade level for this math sheet?\",\"answer\":\"This document is designed for second-grade students to practice math skills within 20.\"},{\"question\":\"How many practice problems are included in the worksheet?\",\"answer\":\"The worksheet contains 24 problems, divided into 12 addition and 12 subtraction questions.\"},{\"question\":\"What is the purpose of the 'Challenge' section?\",\"answer\":\"The challenge section encourages students to select three numbers from a provided set to form correct addition and subtraction equations, helping them explore number relationships.\"}]","Add and Subtract Within 20 - Sheet 1 | PDF",1792671324]