Two Tier Sums Exercise 1
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Type in your answers directly into the box below the tiered-numbers. If you cannot use backspace, use the arrow keys
to move your position. When you are done, click Score Me to see how well you did. If you didn't get a 100%,
return to the questions marked "X" and correct your answers. Then click on Score Me again.
Repeat until you get all your answers correct.
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