Use the standard algorithm: 19.1 + 2.6. Show your regrouping or division steps.
21.7
Align decimal points; 19.1 + 2.6 = 21.7.
Day 003Adding Decimals
Standards 6.NS.B.3
LEARNING TARGET
I can add decimals by aligning equal place values.
01 · LEARN
Build the idea
Line up decimal points so tenths are under tenths and hundredths under hundredths. Add zeros if helpful. Add from right to left, regroup, and bring the decimal point straight down.
Use the standard algorithm: 6.2 + 0.4. Show your regrouping or division steps.
6.6
Align decimal points; 6.2 + 0.4 = 6.6.
02 · PRACTICE
Your turn
Work in order. Start with the foundations, then build toward explanation and application.
Use the standard algorithm: 76.1 + 4.8. Show your regrouping or division steps.
Use the standard algorithm: 63.1 + 4.4. Show your regrouping or division steps.
Use the standard algorithm: 82.5 + 7.1. Show your regrouping or division steps.
Use the standard algorithm: 3 + 4.3. Show your regrouping or division steps.
Use the standard algorithm: 5.86 + 3.7. Show your regrouping or division steps.
Use the standard algorithm: 7.01 + 8.8. Show your regrouping or division steps.
Use the standard algorithm: 8.94 + 0.69. Show your regrouping or division steps.
Use the standard algorithm: 6.68 + 0.52. Show your regrouping or division steps.
A runner walks 8.36 km in the morning and 0.82 km later. What is the total distance?
A runner walks 5.45 km in the morning and 0.61 km later. What is the total distance?
03 · CHECK
Answers and reasoning
Reveal the teacher answer key
- 80.9
Align decimal points; 76.1 + 4.8 = 80.9.
- 67.5
Align decimal points; 63.1 + 4.4 = 67.5.
- 89.6
Align decimal points; 82.5 + 7.1 = 89.6.
- 7.3
Align decimal points; 3 + 4.3 = 7.3.
- 9.56
Align decimal points; 5.86 + 3.7 = 9.56.
- 15.81
Align decimal points; 7.01 + 8.8 = 15.81.
- 9.63
Align decimal points; 8.94 + 0.69 = 9.63.
- 7.2
Align decimal points; 6.68 + 0.52 = 7.2.
- 9.18 km
Align decimal points; 8.36 + 0.82 = 9.18.
- 6.06 km
Align decimal points; 5.45 + 0.61 = 6.06.