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32 votes
32 votes
If one addend is 7 and the sum is 21, what is the other addend?​

User Donavan White
by
2.9k points

2 Answers

14 votes
14 votes

Answer:

14

Explanation:

First, we'll mark our unknown addend as a variable.

How about x?

So, now our equation is 7+x=21

Now we have to figure out what x is.

You could have done this in a number of ways.

Option 1: The Sub-Add

21-7=x

Option 2: Basic Addition (First Grade Edition)

21+x=7

Option 3: The really hard thing that could be avoided by doing one and two and is also really long to say so just don't do it

x+7=21

so x will equal the addend

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21

Now count up all of the numbers past seven.

There are fourteen.

So x equals 14.

Told ya it was hard.

I hope this helped! Contact me for more!

User Inzimam Tariq IT
by
2.8k points
21 votes
21 votes

Answer:

14

Explanation:

So we need to do 21-7. This is 14. So the other addend is 14.

User Lutz Lehmann
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3.0k points