Name: ________ Date:_________
Finding the unknown value (S12)
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1
2
–
1
=
3
2
2
3
–
1
=
5
2
3
1
–
x
=
1
3
12
4
x
–
1
=
1
2
10
5
3
–
x
=
11
4
5
20
6
x
–
1
=
1
3
6
2