One array, four facts: 3rd grade math lesson

What this lesson shows

3 rows of 4: 3 × 4, 4 × 3, 12 ÷ 3, 12 ÷ 4.

The worked example

The lesson works this one step by step: 3 × 4. Then your kid tries one like it on paper.

The steps

Rows times columns
Columns times rows
Share into rows
Share into columns

Helping at home

Draw the rows of dots first. Count the rows and the dots in a row for the two multiplications. Then share all the dots into the rows, and into the columns, for the two divisions. The same three numbers appear in every fact.

If your kid gets stuck

Draw the rows of dots 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.

See how Lux works

Standards

Common Core 3.OA.C.7
Fluently multiply and divide within 100, using strategies such as the relationship between multiplication and division (e.g., knowing that 8 × 5 = 40, one knows 40 ÷ 5 = 8) or properties of operations. By the end of Grade 3, know from memory all products of two one-digit numbers.

Matches a standard in all 50 states and DCSee each state's code

Alabama MA19.3.7a, MA19.3.7b
Alaska 3.OA.7
Arizona 3.OA.C.7 *
Arkansas 3.CAR.2
California 3.OA.C.7
Colorado 3.OA.C.7
Connecticut 3.OA.C.7
Delaware 3.OA.C.7
District of Columbia 3.OA.C.7
Florida MA.3.NSO.2.4
Georgia 3.PAR.3.2
Hawaii 3.OA.C.7
Idaho 3.OA.C.7.a, 3.OA.C.7.b
Illinois 3.OA.C.7
Indiana 3.CA.5, 3.CA.6
Iowa 3.OA.C.7
Kansas 3.OA.7
Kentucky KY.3.OA.7
Louisiana 3.OA.C.7
Maine 3.OA.C.7
Maryland 3.NOS.E.9.a, 3.NOS.E.9.b, 3.NOS.E.9.d, 4.NOS.C.7.a, 4.NOS.C.7.b
Massachusetts 3.OA.C.7
Michigan 3.OA.C.7
Minnesota 4.1.1.1
Mississippi 3.OA.7
Missouri 3.RA.C.7, 3.RA.C.8
Montana MT.3.OA.7
Nebraska 3.A.1.g
Nevada 3.OA.C.7
New Hampshire 3.OA.C.7
New Jersey 3.OA.C.7
New Mexico 3.OA.C.7
New York NY-3.OA.7.a, NY-3.OA.7.b
North Carolina NC.3.OA.1.b, NC.3.OA.2.b, NC.3.OA.7.a, NC.3.OA.7.b
North Dakota 3.AR.OA.1, 4.AR.OA.1, 5.AR.OA.1
Ohio 3.OA.7
Oklahoma 3.N.2.2, 4.N.2.1
Oregon 3.OA.C.7
Pennsylvania CC.2.2.3.A.3
Rhode Island 3.OA.C.7, 4.OA.A.3.a
South Carolina 3.PAFR.1.3
South Dakota 3.OA.C.7.a, 3.OA.C.7.b
Tennessee 3.OA.C.7
Texas 111.5.b.4.F
Utah 3.OA.7.a, 3.OA.7.b
Vermont 3.OA.C.7
Virginia 3.CE.2d, 3.CE.2f
Washington 3.OA.C.7
West Virginia M.3.7
Wisconsin M.3.OA.C.6, M.4.OA.D.6
Wyoming 3.OA.7

One array, four facts