Name: ________ Date:_________

Finding the unknown value (A1)

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1

1	2	+	1	3	=
	3			4

2

1	2	+	1	3	=
	3			5

3

	1	+	x	=	2
	3				3

4

x	+	2	=	3
		3		4

5

	1	+	x	=	2
	3		4		3

6

	x	+	3	=	1	2
	3		4			3