Name: ________ Date:_________
Finding the unknown value (A12)
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1
2
+
1
1
=
5
4
2
1
+
1
7
=
2
9
3
1
+
x
=
1
6
3
4
x
+
1
=
11
3
15
5
1
+
x
=
9
4
5
20
6
x
+
1
=
5
4
6
12