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Subtraction Within 20 — Missing Numbers Worksheet

Missing minuend, subtrahend and difference within 20 — the full equation-family practice.

1.7−22.−93.−54.9−85.7−66.−37.7−8.−49.6−10.−811.5−12.4−113.9−114.8−515.1−116.10−417.8−18.9−519.7−120.8−721.7−22.9−23.−224.8−1
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1.7−252.10−913.6−514.9−815.7−616.9−367.7−438.9−459.6−4210.8−8011.5−4112.4−1313.9−1814.8−5315.1−1016.10−4617.8−3518.9−5419.7−1620.8−7121.7−3422.9−9023.9−2724.8−17
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Teaching notes

A hidden first number (▢ − 6 = 9) is the hardest slot in first grade. Treat two or three solved boxes as success; the sheet is diagnostic, not a speed drill.

Common Core: 1.OA.D.8

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