Subtraction Within 20: Missing Numbers and Equation Balance
Find missing numbers inside expressions, then make both sides of equations equal. To find the missing number being subtracted, subtract the known difference from the starting number.
30 problems · A4 · 1 page
What’s in this worksheet?
These 30 problems use numbers within 20. Find missing numbers inside expressions, then make both sides of equations equal. To find the missing number being subtracted, subtract the known difference from the starting number. Try 15 − 7 = □ − 6.
Subtraction Within 20: Missing Numbers and Equation Balance
Name: ___________Date: ___________Time: ___________
1−=0
9−=4
−3=1
−9=6
−12=3
7−=4
17−=16
−10=0
3−=2
−10=8
10−=9
19−=8
2−=0
9−=5
18−=3
13−=15−7
18−4=−5
15−=18−9
−4=20−7
14−2=15−
13−=18−8
18−=16−1
7−3=15−
20−2=−1
8−4=−7
19−=16−7
20−=19−1
16−10=−2
−5=16−1
−10=12−12