Subtracting From Twenty Worksheet
This Subtracting From Twenty Worksheet gives 1st Grade students three number-line jumps and six missing-number problems, all taken from 20. An answer key is included, so it is quick to check.
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About this resource
Description
Twenty is the number first graders are asked to subtract from more than any other, because taking a number away from twenty is the bridge between counting back and knowing a fact by heart. This Subtracting From Twenty Worksheet keeps the minuend fixed at 20 and changes everything else, so a student can feel the pattern instead of restarting from scratch on every problem.
The page works in two steps. Part A gives three number lines marked from 0 to 20, each with the jump already drawn from twenty back to the answer. A child starts on twenty, follows the arrow, reads the tick it lands on, and writes that number in the box beside the equation. Part B takes the model away and turns the question around: the difference is printed and the number that was subtracted is missing, so the student has to work backward from the answer. That reversal is what separates a child who has memorized a list from one who understands what subtraction does, and it is why a short page of nine problems still asks for real thinking.
What’s Included
- Three coded 0 to 20 number lines with the count-back jump drawn
- Six missing-number problems with the difference given
- Nine different subtrahends, none repeated anywhere on the page
- A full answer key on the second page
- A print-ready PDF sized for standard letter paper
Three Reasons This Helps Kids
- The number line shows subtraction as movement, which is the model children come back to whenever a fact will not surface.
- Fixing the minuend at twenty lets a student notice that a bigger jump always lands lower, instead of treating every problem as unrelated.
- The missing-number half checks understanding rather than recall, so a child cannot finish the page by pattern-matching.
Teacher and Parent Ideas
Use the first half as a guided warm-up, tracing the jump with a finger while counting out loud, then let students try the second half on their own. Ask a child to explain how they found a missing number, since “I counted up from the answer” and “I took the answer away from twenty” are both correct and hearing both is useful. A blank number line on the board turns this first grade subtraction worksheet into a whole-class routine, and the page also works as a quick check before moving on to subtraction with two-digit numbers. This Subtracting From Twenty Worksheet fits a math center, a homework folder, or a small intervention group.
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