Name: ________ Date:_________
Finding the unknown value (A15)
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1
3
+
1
1
=
4
6
2
1
1
+
1
1
=
3
8
3
2
+
x
=
13
5
20
4
x
+
1
=
11
4
12
5
5
+
x
=
1
6
4
6
x
+
1
=
29
5
6
30