15 questions
1st - 1st Grade
Mathematics
Addition within 20 is a Grade 1 mathematics worksheet that gives students 15 multiple-choice addition problems. The equations use addends from 1 to 15 and require students to find sums from 11 through 20, including facts such as 9 + 7, 13 + 7, 9 + 9, and 9 + 8. Each item includes four answer choices, allowing students to practise calculating accurately and identifying the correct sum. This free printable worksheet is useful for introducing, reinforcing, or checking early addition fluency within 20. Students can solve each equation using counting-on, known facts, or other strategies before selecting an answer. Teachers receive a complete answer key for efficient review and feedback, making the worksheet suitable for independent practice, small-group instruction, homework, or a quick formative assessment.
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This Grade 1 worksheet develops fluency with addition equations whose sums are within 20 through 15 multiple-choice items. Students calculate facts such as 9 + 7, 13 + 7, and 9 + 9, then distinguish the correct sum from three distractors, building accuracy and confidence with early addition.
Model a counting-on strategy with one of the worksheet’s equations, such as starting at 13 and counting forward 7 for 13 + 7. Then have students solve the remaining multiple-choice items by explaining how they found each sum, rather than guessing from the options. Use the answer choices to discuss why a tempting number is not the result of the two addends.
Watch for students choosing one of the addends instead of the sum, miscounting when solving facts such as 9 + 7 or 9 + 8, or selecting a nearby distractor for equations such as 12 + 6 and 11 + 3. Students may also confuse related facts, so ask them to recount or represent both addends when their selected option does not match the equation.
You can assign this worksheet as a printable PDF or as a digital quiz on Wayground. It includes a complete answer key, and printable submissions can be graded by scanning student work with the Wayground for Teachers app. The printable format also gives schools an option for reducing screen time during addition practice.
In the worksheet’s Advanced Settings, adjust font spacing or choose a larger font size so the 15 equations and their answer choices are easier to scan. You can also apply a dyslexia-friendly font or translate the worksheet into another language while students practise solving the addition facts within 20.
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