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natka813 [3]
2 years ago
8

Write an addition equation or a subtraction equation (your choice!) to describe the diagram

Mathematics
1 answer:
Fed [463]2 years ago
8 0

Answer:  -3 + 4 = 1

==================================================

Explanation:

We start at the bottom layer.

That arrow on the bottom layer goes from 0 to -3. In short, it represents the number -3.

The upper arrow moves from -3 to +1 or simply 1. This is a distance of 4 spaces. So we add on 4.

Overall, this diagram represents -3+4 = 1

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So, what is the total lenght of the pieces that wer cut off?

we multiply the lenght by the number:

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30\frac{3}{4}-21\frac{2}{3}

we need to bring the two fractions to the same denominator (by multiplying the fraction art in the first by 3 and 4 the second):

30\frac{9}{12}-21\frac{8}{12}=9 \frac{1}{12}

so the correct answer is D!




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