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Grade 5 Math · World 4: Thousandths Dock · Level 39
Add Decimals
Add to the hundredths with grids, place value, and money.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 39
- Adding decimals is place value adding. Tenths go with tenths, and hundredths go with hundredths. Let's add 2.4 and 1.35.
- Line up the points, and write 2.4 as 2.40. The zero doesn't change it, and it fills the empty place.
- Add each place. 0 and 5 hundredths is 5 hundredths. 4 and 3 tenths is 7 tenths. 2 and 1 is 3.
- Regrouping works just as before. 10 hundredths make a tenth, and 10 tenths make a one. Money is great practice: think dollars, dimes, and pennies.
Georgia's K-12 Mathematics Standards:
- 5.NR.4.4 — Solve problems involving addition and subtraction of decimal numbers to the hundredths place using a variety of strategies.