Name: ________ Date:_________
Finding the unknown value (A13)
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1
1
+
1
=
5
9
2
3
+
2
=
4
6
3
5
+
x
=
37
6
30
4
x
+
2
=
23
5
20
5
2
+
x
=
13
5
4
20
6
x
+
1
=
19
4
5
20