What does the missing-number format practise?

Writing a problem as a + □ = c or □ − b = c asks a child to work backwards rather than just compute left to right. That is the first step towards algebra, and it is why the blank moves position from problem to problem.

Which number limit should I choose?

Within 10 and within 20 suit grade 1, within 100 suits grade 2, and within 1000 suits grade 3. If a child is counting on fingers rather than recalling, drop back one limit rather than adding more problems.

It hides exactly one problem per column whose answer is 67, turning the sheet into a small treasure hunt. It is a way to keep a child scanning their own answers, which is a form of checking.

Add & Subtract Worksheets

Addition & subtraction drills · Grades 1–3

Randomized addition and subtraction problems within 10, 20, 100 or 1000, with the blank placed at a random position (a + □ = c, □ − b = c, a − b = □). Choose inline or stacked layout and 2 to 4 columns; the “67 mode” hides exactly one problem per column whose answer is 67 for a small treasure hunt.

Skills: addition, subtraction, missing addend, mental arithmetic. Format: printable, randomized on every load.

Settings

Operation: addition, subtraction or both
Limit: within 10, 20, 100 or 1000
Layout: inline or stacked (vertical)
Columns: 2, 3 or 4 (20–40 problems)
67 mode: one hidden answer of 67 per column

Example problems

8 + 5 = □
□ + 6 = 14
17 − 9 = □
□ − 4 = 12

How to use this worksheet

Open https://superawesomemath.com/worksheets/add-subtract.
Adjust the settings above; they are saved in your browser.
Press Regenerate for a new random set, then Print.

Frequently asked questions

What does the missing-number format practise?: Writing a problem as a + □ = c or □ − b = c asks a child to work backwards rather than just compute left to right. That is the first step towards algebra, and it is why the blank moves position from problem to problem.
Which number limit should I choose?: Within 10 and within 20 suit grade 1, within 100 suits grade 2, and within 1000 suits grade 3. If a child is counting on fingers rather than recalling, drop back one limit rather than adding more problems.
What is 67 mode?: It hides exactly one problem per column whose answer is 67, turning the sheet into a small treasure hunt. It is a way to keep a child scanning their own answers, which is a form of checking.

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