What this lesson shows
6/10 = 60/100 on a 10 × 10 grid: each column holds ten hundredths.
The worked example
The lesson works this one step by step: 6/10 = ?/100. Then your kid tries one like it on paper.
The steps
- A column is 1 tenth
- A small square is 1 hundredth
- Count by tens
- Multiply the top and the bottom by 10
Helping at home
Draw a 10 × 10 grid and shade the tenths as whole columns. Each column is 10 small squares, so count the shaded squares by tens. Wholes stay as they are.
If your kid gets stuck
Each tenth is 10 hundredths.
Watch it with Lux
With Lux, this lesson is a narrated video and a printed page your kid works on. Then Lux helps with the same math on their own worksheet, one question at a time.
Standards
- Common Core 4.NF.C.5
Express a fraction with denominator 10 as an equivalent fraction with denominator 100, and use this technique to add two fractions with respective denominators 10 and 100. For example, express 3/10 as 30/100, and add 3/10 + 4/100 = 34/100.
Matches standards in 43 statesSee each state's code
- Alabama MA19.4.17a
- Alaska 4.NF.5
- Arizona 4.NF.C.5
- Arkansas 4.NPV.9
- California 4.NF.C.5
- Colorado 4.NF.C.5
- Connecticut 4.NF.C.5
- Delaware 4.NF.C.5
- District of Columbia 4.NF.C.5
- Florida MA.4.FR.1.1, MA.4.FR.2.3
- Georgia 4.NR.5.1
- Hawaii 4.NF.C.5
- Idaho 4.NF.C.5
- Illinois 4.NF.C.5
- Iowa 4.NF.C.5
- Kansas 4.NF.5
- Kentucky KY.4.NF.5.a, KY.4.NF.5.b
- Louisiana 4.NF.C.5
- Maine 4.NF.C.5
- Maryland 4.NOS.F.14
- Massachusetts 4.NF.C.5
- Michigan 4.NF.C.5
- Mississippi 4.NF.5
- Montana MT.4.NF.5, 4.D3.6, 4.D4.3
- Nevada 4.NF.C.5
- New Hampshire 4.NF.C.5
- New Jersey 4.NF.C.5
- New Mexico 4.NF.C.5
- New York NY-4.NF.5
- North Carolina NC.4.NF.6.a, NC.4.NF.6.b
- North Dakota 4.NO.NF.1
- Ohio 4.NF.5
- Oregon 4.NF.C.5
- Pennsylvania CC.2.1.4.C.3
- Rhode Island 4.NF.C.5
- South Carolina 4.PAFR.2.2
- South Dakota 4.NF.C.5
- Tennessee 4.NF.C.5
- Utah 4.NF.5
- Vermont 4.NF.C.5
- Washington 4.NF.C.5
- West Virginia M.4.16
- Wisconsin M.4.NF.C.5