Name: ________ Date:_________
Finding the unknown value (A17)
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1
1
2
+
2
=
3
5
2
5
+
1
1
=
8
7
3
1
+
x
=
7
3
12
4
x
+
3
=
1
13
5
30
5
1
+
x
=
11
5
6
30
6
x
+
1
=
11
5
2
10