Name: ________ Date:_________
Finding the unknown value (S17)
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1
5
–
3
=
6
4
2
1
1
–
5
=
5
6
3
3
–
x
=
11
4
20
4
x
–
1
=
1
3
15
5
3
–
x
=
1
4
2
4
6
x
–
1
=
1
3
2
6