1. Subtracting Decimals 5.NBT.B.7

2. – 52.0 Here is 0.79 – 0.54.First, let’s copy the decimals below.Then let’s align the decimals carefully …… so that the decimal points are lined up …… and the ones places are lined up.Now, we are ready to subtract.Let’s begin in the hundredths place. What is 9 – 4?5What is 7 tenths – 5 tenths?2 tenthsHere is the decimal point.Let’s mark it below.What is 0 minus 0?0So, the difference is 0.25. 0.790.540.79–0.54 Subtracting Decimals

3. – 70.3 Here is 8.39 – 5.32.First, let’s copy the decimals below.Then let’s align the decimals carefully …… so that the decimal points are lined up …… and the ones places are lined up.Now, we are ready to subtract.Let’s begin in the hundredths place. What is 9 – 2?7What is 3 tenths – 3 tenths?0 tenthsHere is the decimal point.Let’s mark it below.What is 8 – 5?3So, the difference is 3.07. 8.39 –5.32 Subtracting Decimals.

4. – 71.3 Here is 68.49 – 5.32.First, let’s copy the decimals below.Then let’s align the decimals carefully …… so that the decimal points are lined up …… and the ones places are lined up.Now, we are ready to subtract.Let’s begin in the hundredths place. What is 9 – 2?7What is 4 tenths – 3 tenths?1 tenthHere is the decimal point.Let’s mark it below.What is 8 – 5?3The difference is 63.17. 6 And here are 6 tens, minus nothing …… so we can mark 6 in the tens place. 5.32 68.49 – Subtracting Decimals

5. 9 38.579 – 71.6 Here is 38.579 – 2.4.Let’s write the first decimal below.Now, let’s write the second decimal …… so that the decimal points are lined up …… and the ones places are lined up.Now, we are ready to subtract.Let’s begin in the thousandths place. We see 9 minus nothing.So, we mark down 9.In the hundredths place, we see 7 minus nothing.We mark down 7.Here is the decimal point.Let’s mark it below.What is 8 – 2?6The difference is 36.179. – 3 Here are 3 tens, minus nothing...… so we write 3 in the tens place. 2.4 38.579 2.4 In the tenths place, what is 5 – 4?1 Subtracting Decimals

6. 86.52 – 25.0 Here is 86.52 – 46.Let’s write the first number below.Notice that 46 is not a decimal, so there are no decimal points to line up.Instead, we will write the number here …… so that the ones places are lined up.Now, we are ready to subtract.2 minus nothing …… is 2.Here is the decimal point.Let’s mark it below.What is 6 – 6?0So, the difference is 40.52. – 4 What is 8 – 4?4 46 86.52 46 5 minus nothing …… is 5. Subtracting Decimals

7. 82.31 – 68.5 Here is 82.31 – 46.45.Let’s write the decimals below …… so that the decimal points are lined up …… and the ones places are lined up.Now, we are ready to subtract.We cannot subtract 5 from 1 …6 – 3 46.45 82.31 46.45 217 1 11 … so we will need to regroup.Let’s cross off the 3 in the tenths place …… leave 2 tenths …… and regroup 1 of the tenths to the hundredths place.Now, we can subtract hundredths. What is 11 – 5?In the tenths place, we cannot subtract 4 from 2 …8… so we will need to regroup.Let’s cross off the 2 in the ones place …… leave 1 ones …… and regroup 1 of the ones to the tenths place.Now, we can subtract tenths. What is 12 – 4?In the ones place, we cannot subtract 6 from 1 …5… so we will need to regroup.Let’s cross off the 8 in the tens place …… leave 7 tens …… and regroup 1 of the tens to the ones place.Now, we can subtract. What is 11 – 6?Here is the decimal point.Let’s mark it below.So, the difference is 35.86.What is 7 minus 4?3 Subtracting Decimals

8. 29 – 4.5 Here is 29 – 3.6.Let’s write the numbers below.Since there are no decimal points to line up …… we’ll be sure to line up the ones places.Now, we are ready to subtract.We cannot subtract 6 from nothing … – 2 3.6 8 1 … so we will need to regroup. It will help if we have a 0 in this place so that we can regroup.We still cannot subtract 6 from 0 …4… so we will need to regroup.Let’s cross off the 9 in the ones place …… leave 8 ones …… and regroup 1 of the ones to the tenths place.Now, we can subtract tenths. What is 10 – 6?5What is 8 – 3?Here is the decimal point.Let’s mark it below.So, the difference is 25.4.What is 2 minus nothing?2 29.0 Let’s mark a 0 in the tenths place. That doesn’t change the value of the number. Subtracting Decimals

9. Closing Question Subtracting Decimals

10. 56 – 3.1 Here is 56 – 24.7.Let’s write the numbers below.Since there are no decimal points to line up …… we’ll be sure to line up the ones places.Now, we are ready to subtract.We cannot subtract 7 from nothing … – 3 24.7 5 1 … so we will need to regroup. It will help if we have a 0 in this place so that we can regroup.We still cannot subtract 7 from 0 …3… so we will need to regroup.Let’s cross off the 6 in the ones place …… leave 5 ones …… and regroup 1 of the ones to the tenths place.Now, we can subtract tenths. What is 10 – 7?1What is 5 – 4?Here is the decimal point.Let’s mark it below.So, the difference is 31.3.What is 5 – 2?3 56.0 Let’s mark a 0 in the tenths place. That doesn’t change the value of the number. Subtracting Decimals