Video: Verifying Whether Two Addition Expressions Are Equal

Check if the equal sign has been used correctly in 5 + 3 + 6 = 8 + 9. Are the two sums equal?

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Video Transcript

Check if the equal sign has been used correctly in five plus three plus six equals eight plus nine. Are the two sums equal?

We’re checking two different sums. We’re given the statement five plus three plus six is equal to eight plus nine. To verify that, we’ll need to find the solution of both sides. We can start by adding five plus three plus six. I know that five plus three equals eight and eight plus six equals 14. The sum of the left side is 14. On the right side, we only have two values: eight plus nine. We know that eight plus nine equals 17.

And now we recognize that this statement says 14 equals 17. 14 does not equal 17. Five plus three plus six does not equal eight plus nine.

To answer our question are the two sums equal? We can say no. These two sums are not equal.

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