To solve the subtraction problem 16-20.5, we start at 16 on the number line and then move 20.5 units to the left. However, since 20.5 is greater than 16, we will have to go into negative numbers.
On the number line diagram, we would represent 16 as a point on the line. Then, we would count and move 20.5 units to the left. This would take us past 0, into the negative numbers, and closer to -4.5.
So, the solution to 16-20.5 is approximately -4.5.
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Consider 16-20.5. What is the solution? Represent the subtraction on a horizontal number line diagram.
1 answer
1 answer