Name: ________ Date:_________
Finding the unknown value (S39)
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1
1
4
–
1
4
=
5
6
2
5
–
1
=
6
5
3
5
–
x
=
1
6
6
4
x
–
1
=
3
4
20
5
3
–
x
=
3
4
5
20
6
x
–
1
=
7
6
4
12