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## Arithmetic (all content)

### Unit 6: Lesson 9

Adding and subtracting decimals word problems# Adding decimals word problem

CCSS.Math:

Here's a simple word problem asking us to put our adding decimals skill to work. Created by Sal Khan.

## Want to join the conversation?

- im back from the dead(5 votes)
- I need a new password for my school compter(3 votes)
- how are you in it now?(1 vote)

- So- that's all I wish they explained it better... Anyone have ANY help for me?:)(3 votes)
- What kind of help?(1 vote)

- When you line the decimals up, does it matter which is on top?(2 votes)
- No, when adding or multiplying, the order of terms (numbers) doesn't matter.(3 votes)

- That is smart to put the decimal first(3 votes)
- hello, math is very frustrating for me and I usually end up depressed afterwards. Does anybody have tips to help me stay happy about math?(2 votes)
- Hey if you feel like giving up you should probably take a break, walk around, grab a snack, and that's supposed to clear your mind. Then you're ready to go! (i really hope this has helped you though you are probably reading this 6 years later, and i am sure that you have by THEN found a solution)(2 votes)

- why does it say Williams parents when William was not born and why does it say Williams parents gave birth when it should be the mother not both the man does not help!(3 votes)
- Nadia weighed 7.27 pounds and was 21.5 inches tall, and vanessa weighed 8.34 pounds(3 votes)
- Allen bought 3 pieces of candy at the store and later bought 2 more. The total cost was $3.75. How much did the shop charge per piece of candy?(2 votes)
- they were $0.75 a piece. Divide $3.75 by 5 (the total number of pieces of candy) to get the answer.(2 votes)

## Video transcript

On Saturday, William's
parents gave birth to twins and named them
Nadia and Vanessa. When they were first born,
Nadia weighed 7.27 pounds and was 21.5 inches tall, and
Vanessa weighed 8.34 pounds. How much did the
babies weigh in total? So they tell us Nadia weighed
7.27 and Vanessa weighed 8.34. We have to add those up. And really, they
just gave us this. The length of Nadia at birth
really is a distraction, just so that we just
don't mindlessly add any numbers we see. So this is really
unnecessary information just to distract us. So we need to add Nadia's
birth weight plus Vanessa's. So it's 7.27. So 7.27 plus 8.34. And it's always important
that we line up the decimal. And I'd like to do
the decimal first. So it's 8.34. And we'll just add these two up. So 7 plus 4, and this is
really 7/100 plus 4/100 is 11/100, which is the same
thing as 1/100 and 1/10. 1/10 plus 2/10
plus 3/10 is 6/10. We've got our decimal
sign right over there. And then 7 plus 8 is
15, or you could even say it's five 1's and one 10. And we're done. They weighed 15.61
pounds in total.