Question Video: Adding One-Digit Numbers to Three-Digit Numbers to Solve a Word Problem Mathematics

Noah has 343 stamps. His friend Hannah gives him 5 more stamps. How many stamps does Noah have now?

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Video Transcript

Noah has 343 stamps. His friend Hannah gives him five more stamps. How many stamps does Noah have now?

This is an addition problem. Noah has 343 stamps, and Hannah gives him five more. So, to find out how many stamps Noah has all together, we need to add 343 and five. The number 343 is a three-digit number. It has three 100s, four 10s, and three ones. And we have to add five ones. We just need to add the ones because the number five has no hundreds and no tens.

What is three ones plus five ones? We know that three plus five is eight, so 343 plus five equals 348. There was nothing to add to our hundreds digit and nothing to add to our tens digit. We just had to add five more ones to the three ones in our number. We know that five more than three is eight. The only digit which changed was the ones digit. 343 plus five equals 348.

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