Name: ________ Date:_________
Finding the unknown value (A21)
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1
5
+
5
=
7
8
2
4
+
1
=
5
9
3
5
+
x
=
1
19
5
30
4
x
+
1
=
1
6
5
4
+
x
=
1
11
5
4
20
6
x
+
1
=
1
2
5
3
15