Name: ________ Date:_________

Finding the unknown value (A31)

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1

5	+	3	=
9		8

2

1	+	1	=
9		10

3

	3	+	x	=	1	3
	4					20

4

x	+	2	=	1	5
		3			12

5

	1	+	x	=	5
	4		6		12

6

	x	+	1	=	3
	2		4		4