Find the missing number to complete each subtraction equation within 20.
Missing Number Subtraction within 20
Your Missing Number round
Ten questions with immediate feedback, alternating the blank between minuend and subtrahend.
Missing Number Subtraction within 20Question 1 / 10
0 / 10
Find the missing number and enter it directly in the equation.
−3=6
Enter the missing number.
Round complete.
Correct first time: 0 / 10
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Keep the subtraction fact in order
Read the complete equation before answering. If the minuend is missing, find the starting number that produces the shown difference. If the subtrahend is missing, find the amount taken away.
The blank alternates between the left and right operand. Every value stays within 20, zero is not used, and an incorrect attempt never reveals the answer.
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