What this lesson shows
"3 times as many" with a bar model: one bar, then three of it.
The worked example
The lesson works this one step by step: 3 × 6. Then your kid tries one like it on paper.
The steps
- Draw one bar
- Draw that many parts
- Multiply, then check by adding
Helping at home
Draw a bar for the smaller amount, then a bar with that many equal parts. Multiply, then check by adding the parts.
If your kid gets stuck
Draw the bars 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.OA.A.2
Multiply or divide to solve word problems involving multiplicative comparison, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem, distinguishing multiplicative comparison from additive comparison. - Common Core 4.OA.A.1
Interpret a multiplication equation as a comparison, e.g., interpret 35 = 5 × 7 as a statement that 35 is 5 times as many as 7 and 7 times as many as 5. Represent verbal statements of multiplicative comparisons as multiplication equations.
Matches standards in 50 statesSee each state's code
- Alabama MA19.4.2, MA19.4.1
- Alaska 4.OA.2, 4.OA.1
- Arizona 4.OA.A.2 *, 4.OA.A.3 *, 4.OA.A.1
- Arkansas 4.CAR.7, 4.CAR.8
- California 4.OA.A.2, 4.OA.A.1
- Colorado 4.OA.A.2, 4.OA.A.1
- Connecticut 4.OA.A.2, 4.OA.A.1
- Delaware 4.OA.A.2, 4.OA.A.1
- District of Columbia 4.OA.A.2, 4.OA.A.1
- Florida MA.4.AR.1.1
- Georgia 4.NR.2.2
- Hawaii 4.OA.A.2, 4.OA.A.1
- Idaho 4.OA.A.2, 4.OA.A.1
- Illinois 4.OA.A.2, 4.OA.A.1
- Indiana 4.CA.5
- Iowa 4.OA.A.2, 4.OA.A.3, 4.OA.A.1
- Kansas 4.OA.2, 4.OA.1
- Kentucky KY.4.OA.2, KY.4.OA.1
- Louisiana 4.OA.A.2, 4.OA.A.1
- Maine 4.OA.A.2, 4.OA.A.1
- Maryland 4.AT.A.2, 4.AT.A.3, 4.AT.A.4.b, 4.AT.A.1
- Massachusetts 4.OA.A.2, 4.OA.A.1
- Michigan 4.OA.A.2, 4.OA.A.1
- Minnesota 4.1.1.5, 4.2.2.1
- Mississippi 4.OA.2, 4.OA.1
- Missouri 4.RA.A.1, 4.RA.A.3
- Montana MT.4.OA.2, 4.D1.22, 4.D2.8, 4.D3.3, MT.4.OA.1
- Nebraska 4.A.1.f
- Nevada 4.OA.A.2, 4.OA.A.1
- New Hampshire 4.OA.A.2, 4.OA.A.1
- New Jersey 4.OA.A.2, 4.OA.A.1
- New Mexico 4.OA.A.2, 4.OA.A.1
- New York NY-4.OA.2, NY-4.OA.1
- North Carolina NC.4.OA.1
- North Dakota 4.AR.OA.3, 4.AR.OA.5
- Ohio 4.OA.2, 4.OA.1
- Oklahoma 4.N.2.4
- Oregon 4.OA.A.2, 4.OA.A.3, 4.OA.A.1
- Pennsylvania CC.2.2.4.A.1
- Rhode Island 4.OA.A.2, 4.OA.A.1
- South Carolina 4.PAFR.3.3
- South Dakota 4.OA.A.2, 4.OA.A.1.a
- Tennessee 4.OA.A.2, 4.OA.A.3, 4.OA.A.1
- Texas 111.5.b.5.C, 111.6.b.4.H
- Utah 4.OA.2, 4.OA.1
- Vermont 4.OA.A.2, 4.OA.A.1
- Virginia 4.CE.2h, 4.CE.2j, 4.CE.2k
- Washington 4.OA.A.2, 4.OA.A.1
- West Virginia M.4.2, M.4.1
- Wisconsin M.4.OA.A.2, M.4.OA.A.1