Name: ________ Date:_________
Finding the unknown value (A9)
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1
5
+
3
=
8
7
2
7
+
1
=
9
7
3
1
+
x
=
9
2
10
4
x
+
3
=
27
5
20
5
3
+
x
=
14
5
3
15
6
x
+
2
=
16
3
5
15