Name: ________ Date:_________
Finding the unknown value (A18)
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1
1
4
+
1
=
6
8
2
3
+
5
=
5
6
3
4
+
x
=
31
5
20
4
x
+
1
=
17
3
15
5
3
+
1
x
=
2
1
4
4
4
6
x
+
1
=
3
2
4
4