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What subtraction expression does the number line model show? HHHHHHHH - 10 -8 -6 -4 -2 0 2 4 0-0 O 3 + 6 O -3 - 6 -3 + (-6)

User Bas Jansen
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1 Answer

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Each number on the number line is obtained by subtraction a number equivalent to the length of the given arrows.

In the red arrow points to -3, then you have from the starting point 0:

0 - 3 = -3

The blue arrow points to the position -9 from position -3, then the length of the arrow is 6. Subtract 6 to the previous number -3:

-3 - 6 = -9

Hence, the subtraction expression is - 3 - 6

User Jimmy Knoot
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