WEBVTT
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Choose the two numbers that make the equation true.
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What take away what equals one.
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Choose from the numbers 18, seven, 14, 13, and three.
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So we’re looking for two numbers that have a difference of one, because the answer to the subtraction calculation is one.
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Here are all of our numbers on a number line, three, seven, 13, 14, 18.
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This helps us to see that 14 is one more than 13.
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And these two numbers have a difference of one.
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So 14 take away 13 equals one.
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The two missing numbers are 14 and 13.