Free adding single digit numbers worksheet with 12 addition problems. Each shows an addition equation with four numbers with one missing. Students fill in the missing number to complete each equation. Sums are all 20 or less.

1st Grade

Adding Within 20Addition

Free Adding 3 Single Digit Numbers Worksheet

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Boost first grade addition skills and number sense with this free adding 3 single digit numbers worksheet! Students are given 12 addition problems, each with four numbers—one of them missing. All problems add up to 20 or less, making this worksheet perfect for early learners practicing basic addition and problem-solving. Great for math centers, independent work, or review!

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