What this lesson shows
Fixes a mistake
2/4 and 2/6 are not equal: the pieces differ in size.
The worked example
The lesson works this one step by step: 2/4 ○ 2/6. Then your kid tries one like it on paper.
The steps
- Matching tops are not enough
- Shade same-size bars
- Same amount means equal
Helping at home
Draw both fractions on bars the same size and shade each. Equal fractions shade exactly the same amount; matching tops or bottoms alone prove nothing.
If your kid gets stuck
Shade both on bars the same size.
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 3.NF.A.3b
Recognize and generate simple equivalent fractions, e.g., 1/2 = 2/4, 4/6 = 2/3. Explain why the fractions are equivalent, e.g., by using a visual fraction model.
Matches standards in 49 statesSee each state's code
- Alabama MA19.3.15a
- Alaska 3.NF.3.b
- Arizona 3.NF.A.3.a, 3.NF.A.3.b
- Arkansas 3.NPV.11
- California 3.NF.A.3
- Colorado 3.NF.A.3.b
- Connecticut 3.NF.A.3
- Delaware 3.NF.A.3
- District of Columbia 3.NF.A.3
- Florida MA.3.FR.2.2
- Georgia 3.NR.4.4
- Hawaii 3.NF.A.3
- Idaho 3.NF.A.3.b
- Illinois 3.NF.A.3
- Indiana 3.NS.4
- Iowa 3.NF.A.3.b
- Kansas 3.NF.3.b
- Kentucky KY.3.NF.3.b
- Louisiana 3.NF.A.3.b
- Maine 3.NF.A.3b
- Maryland 3.NOS.F.13.b
- Massachusetts 3.NF.A.3.b
- Michigan 3.NF.A.3
- Mississippi 3.NF.3.a, 3.NF.3.b
- Missouri 3.NF.A.5
- Montana MT.3.NF.3.a, MT.3.NF.3.b
- Nebraska 3.N.2.d
- Nevada 3.NF.A.3
- New Hampshire 3.NF.A.3
- New Jersey 3.NF.A.3b
- New Mexico 3.NF.A.3
- New York NY-3.NF.3.b
- North Carolina NC.3.NF.3.a
- North Dakota 3.NO.NF.3
- Ohio 3.NF.3.b
- Oregon 3.NF.A.3
- Pennsylvania CC.2.1.3.C.1
- Rhode Island 3.NF.A.3.b
- South Carolina 3.NR.2.3, 3.NR.2.5
- South Dakota 3.NF.A.3.b
- Tennessee 3.NF.A.3.b
- Texas 111.5.b.3.F
- Utah 3.NF.3.b
- Vermont 3.NF.A.3
- Virginia 3.NS.3h
- Washington 3.NF.A.3
- West Virginia M.3.17
- Wisconsin M.3.NF.A.3
- Wyoming 3.NF.3b, 3.NFP.3.B