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Math Drills

Addition and Subtraction up to 20 Review

C-1

Word Problems

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What this worksheet covers

Using the idea of ten and some more, this unit covers addition and subtraction up to 20 with no carrying and no borrowing, such as 13 + 4 and 17 - 5. The group of ten stays as it is and only the ones digits are worked on, and Fill in the Blank and Word Problems confirm the same idea.

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Writing 13 + 4 as 7 is the telling error: only the ones are added and the group of ten is dropped. A single-digit answer points to this pattern. Answering 7 for 17 - 5, by subtracting from the 1 in the tens place as well, follows close behind.

The reasoning itself does not change; only the range of numbers grows beyond Addition up to 10 and Subtraction up to 10. Extending the range while leaving the underlying way of seeing numbers untouched is the same path taken again in Adding and Subtracting Tens.

  • Sums up to 20 · Word Problems3 questions
  • Subtraction up to 20 · Word Problems3 questions
Questions & answers

Problems and answers on this worksheet

These are the problems in “Addition and Subtraction up to 20”, shown with their answers.

  1. (1)In the field, Hannah picked up 12 apples. If she picks up 5 more, how many will there be in all? Answer □

    Answer: 17apples

  2. (2)In the woods, Noah picked up 11 leaves. If Grace picks up 6, how many will there be altogether? Answer □

    Answer: 17leaves

  3. (3)At home, Mason made 12 donuts. If Maeve makes 3, how many will there be altogether? Answer □

    Answer: 15donuts

  4. (4)In the flower garden, 11 red flowers are blooming. If you give away 1, how many are left? Answer □

    Answer: 10flowers

  5. (5)At the greengrocer, 20 oranges are lined up. If you eat 5, how many are left? Answer □

    Answer: 15oranges

  6. (6)At Hannah's house, there are 15 apples. If you eat 3, how many are left? Answer □

    Answer: 12apples

What to do next

Sums up to 20Sums up to 20 Calculation
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Sums up to 20Sums up to 20 Fill in the BlankSums up to 20Sums up to 20 Word ProblemsSubtraction up to 20Subtraction up to 20 CalculationSubtraction up to 20Subtraction up to 20 Fill in the BlankSubtraction up to 20Subtraction up to 20 Word ProblemsAddition and Subtraction up to 20 ReviewAddition and Subtraction up to 20 Review CalculationAddition and Subtraction up to 20 ReviewAddition and Subtraction up to 20 Review Fill in the Blank
Next unit: Adding and Subtracting Tens
Other versions of this worksheet

Other versions of this worksheet