Missing-Number Addition and Subtraction Within 20
Fill each box with the missing number and use addition and subtraction to check your answers.
60 problems · A4 · 1 page
What’s in this worksheet?
These 60 problems mix addition and subtraction within 20. The result is already shown, and the box replaces the first or second number. Use 12 − 5 to solve □ + 5 = 12, or 7 + 5 to solve □ − 5 = 7. Put your answer back in the box to check that both sides are equal.
Missing-Number Addition and Subtraction Within 20
Name: ___________Date: ___________Time: ___________
−2=15
−13=1
−6=12
11−=7
+4=20
10−=5
1−=0
8−=7
10+=20
+5=19
+6=8
4+=10
18−=17
18−=10
16+=20
+3=20
4−=0
+8=11
7−=1
+1=20
−14=6
18−=9
+2=19
−8=2
−12=0
+6=9
2−=1
−9=4
14+=15
16−=8
3+=20
+2=20
10+=19
1+=18
14−=9
11+=13
10+=18
8−=5
19−=7
+5=18
13−=6
+3=17
+1=8
6+=20
7−=2
−6=5
10−=8
7−=0
−1=17
11−=8
17−=5
18−=11
14−=4
14+=20
2−=0
−3=0
+1=18
+1=17
−1=3
14−=12