Name: ________ Date:_________
Finding the unknown value (S20)
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1
2
3
–
1
1
=
5
3
2
1
3
–
1
1
=
5
3
3
3
–
x
=
1
4
4
4
x
–
1
=
3
5
10
5
2
–
x
=
1
5
3
15
6
x
–
2
=
1
4
3
12