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  • Robin Bergen

    April 5, 2021 at 5:02 pm

    Bob has 10 cookies

    Bill comes over and eats some of his cookies.

    How many cookies did Bill eat if Bob now has only 2 cookies left?

    10 – x = 2

    The student could draw a number line and go to 10 and then count the jumps back to 2 and would know the answer is 8. Or the student could consider a scale. If you put 10 apples on one side and 2 on the other, how many would you have to remove from the left side to balance the scale?