Name: ________ Date:_________
Finding the unknown value (S31)
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1
1
3
–
5
=
7
6
2
2
–
3
=
3
5
3
3
–
x
=
1
4
4
4
x
–
1
=
5
3
12
5
2
–
x
=
7
3
5
15
6
x
–
1
=
13
5
6
30