Grade+Four+AF+1.1

1.1 Use letters, boxes, or other symbols to stand for any number in simple expressions or equations (e.g., demonstrate an understanding and the use of the concept of a variable).
 * __Grade Four AF 1.1__**

(submitted by S.Wayment 5/12/09) Which number is represented by _ _ _? What is the value of the expression below if _ _ _ = _ _ _? Which expression could _ _ _ use to find the total number of _ _ _? Which expression below represents _ _ _? Which number should be in the box to make this equation true? What number goes in the box to make this number sentence true? If _ _ _, which statement is true? If _ _ _, what is the value of _ _ _?

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