What this lesson shows
1/4 of 12 as 12 split into 4 equal parts.
The worked example
The lesson works this one step by step: 3/4 of 12. Then your kid tries one like it on paper.
The steps
- Split into equal groups
- One group is one part
- Take as many groups as the top
Helping at home
Draw the number as dots and split them into as many equal groups as the bottom number. One group is one part; take as many groups as the top number.
If your kid gets stuck
Split into equal groups first.
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.B.4b
Understand a multiple of a/b as a multiple of 1/b, and use this understanding to multiply a fraction by a whole number. For example, use a visual fraction model to express 3 × (2/5) as 6 × (1/5), recognizing this product as 6/5. (In general, n × (a/b) = (n × a)/b.)
Matches standards in 47 statesSee each state's code
- Alabama MA19.4.16b
- Alaska 4.NF.4.b
- Arizona 4.NF.B.4.b
- Arkansas 4.CAR.6
- California 4.NF.B.4
- Colorado 4.NF.B.4.a, 4.NF.B.4.b
- Connecticut 4.NF.B.4
- Delaware 4.NF.B.4
- District of Columbia 4.NF.B.4
- Florida MA.4.FR.2.4
- Georgia 5.NR.3.4
- Hawaii 4.NF.B.4
- Idaho 4.NF.B.4.b
- Illinois 4.NF.B.4
- Iowa 4.NF.B.4.b
- Kansas 4.NF.4.b
- Kentucky KY.4.NF.4.a, KY.4.NF.4.b
- Louisiana 4.NF.B.4.b
- Maine 4.NF.B.4b
- Maryland 4.NOS.E.13.c
- Massachusetts 4.NF.B.4.b
- Michigan 4.NF.B.4
- Mississippi 4.NF.4.a, 4.NF.4.b
- Missouri 4.NF.B.7
- Montana MT.4.NF.4.a, MT.4.NF.4.b, 4.D1.9, 4.D2.10, 4.D3.4
- Nebraska 4.N.3.c
- Nevada 4.NF.B.4
- New Hampshire 4.NF.B.4
- New Jersey 4.NF.B.4b
- New Mexico 4.NF.B.4
- New York NY-4.NF.4.a, NY-4.NF.4.b
- North Carolina NC.4.NF.4.a
- North Dakota 4.NO.NF.7
- Ohio 4.NF.4.b
- Oregon 4.NF.B.4
- Pennsylvania CC.2.1.4.C.2
- Rhode Island 4.NF.B.4.b
- South Carolina 4.PAFR.2.3
- South Dakota 4.NF.B.4.b
- Tennessee 4.NF.B.4.b
- Texas 111.7.b.3.I
- Utah 4.NF.4.b
- Vermont 4.NF.B.4
- Virginia 4.CE.3c
- Washington 4.NF.B.4
- West Virginia M.4.15
- Wisconsin M.4.NF.B.4
More in this unit
- Equivalent fractions
- Change both parts, not one
- Comparing with 1/2
- Comparing with a common denominator
- Bigger numbers, not a bigger fraction
- Fractions greater than one
- Breaking a fraction into parts
- Adding and subtracting like fractions
- Why the denominator stays
- Adding mixed numbers
- Subtracting mixed numbers
- Fraction stories, same whole
- A whole number times a fraction
- Multiply only the top
- Fraction times stories
- Simplest form