What this lesson shows
Fixes a mistake
"Gives away 1/3 of the rope" is 1/3 × 3/4. "Gives away 1/3 yard" is 3/4 − 1/3.
The worked example
The lesson works this one step by step: 1/3 × 3/4. Then your kid tries one like it on paper.
The steps
- Of the rope: multiply, then subtract
- Of a yard: just subtract
- Ask: of what?
Helping at home
Ask "a fraction of what?" A fraction of the rope is a part of it: multiply first, then subtract to find what is left. A fraction of a yard is a length: just subtract. Draw both on a yard bar to see the difference.
If your kid gets stuck
Ask: a fraction of what? Then multiply or just subtract.
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 5.NF.B.6
Solve real world problems involving multiplication of fractions and mixed numbers, e.g., by using visual fraction models or equations to represent the problem.
Matches standards in 46 statesSee each state's code
- Alabama MA19.5.14
- Alaska 5.NF.6
- Arizona 5.NF.B.6 *
- Arkansas 5.CAR.9
- California 5.NF.B.6
- Colorado 5.NF.B.6
- Connecticut 5.NF.B.6
- Delaware 5.NF.B.6
- District of Columbia 5.NF.B.6
- Florida MA.5.AR.1.2
- Hawaii 5.NF.B.6
- Idaho 5.NF.B.6
- Illinois 5.NF.B.6
- Indiana 5.CA.7
- Iowa 5.NF.A.2, 5.NF.B.6
- Kansas 5.NF.6
- Kentucky KY.5.NF.6
- Louisiana 5.NF.B.6
- Maine 5.NF.B.6
- Maryland 5.NOS.D.13.a, 5.NOS.D.13.b, 5.NOS.D.15
- Massachusetts 5.NF.B.6
- Michigan 5.NF.B.6
- Mississippi 5.NF.2, 5.NF.6
- Missouri 5.RA.C.5
- Montana MT.5.NF.6, 5.D2.3
- Nebraska 5.N.3.d
- Nevada 5.NF.B.6
- New Hampshire 5.NF.B.6
- New Jersey 5.NF.A.2, 5.NF.B.6
- New Mexico 5.NF.B.6
- New York NY-5.NF.2, NY-5.NF.6
- North Carolina NC.5.NF.4.c
- North Dakota 5.NO.NF.4
- Ohio 5.NF.6
- Oregon 5.NF.B.6
- Pennsylvania CC.2.1.5.C.2
- Rhode Island 5.NF.B.6
- South Carolina 5.PAFR.2.2
- South Dakota 5.NF.B.6
- Tennessee 5.NF.A.2, 5.NF.B.6
- Utah 5.NF.6
- Vermont 5.NF.B.6
- Washington 5.NF.B.6
- West Virginia M.5.16
- Wisconsin M.5.NF.B.6, M.5.NF.A.2
- Wyoming 5.NF.2, 5.NF.6
More in this unit
- Adding fractions with unlike denominators
- Renaming both fractions
- Mixed numbers, unlike denominators
- Adding tops and bottoms
- Same-size wholes
- Fraction stories, add and subtract
- A fraction of a fraction
- Mixed number times a fraction
- Bigger or smaller, without computing
- Times a fraction can shrink
- Area with fraction sides
- Area with decimal sides
- Greatest common factor and least common multiple
- Percents are parts of 100