What this lesson shows
4 tables with 5 chairs each: 5 + 5 + 5 + 5 = 20.
The worked example
The lesson works this one step by step: 4 rows of 5. Then your kid tries one like it on paper.
The steps
- Draw the groups
- The same in each
- Add it again for each group
- Count on to check
Helping at home
Draw one group for each table and put the same number in each. Add that number once for each group, then check by counting on.
If your kid gets stuck
How many groups? How many in each?
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 2.OA.C.4
Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends.
Matches standards in 48 statesSee each state's code
- Alabama MA19.2.4a
- Alaska 2.OA.4
- Arizona 2.OA.C.4
- Arkansas 2.CAR.5
- California 2.OA.C.4
- Colorado 2.OA.C.4
- Connecticut 2.OA.C.4
- Delaware 2.OA.C.4
- District of Columbia 2.OA.C.4
- Florida MA.2.AR.3.2
- Georgia 2.NR.3.2
- Hawaii 2.OA.C.4
- Idaho 2.OA.C.4
- Illinois 2.OA.C.4
- Iowa 2.OA.C.4
- Kansas 2.OA.4
- Kentucky KY.2.OA.4
- Louisiana 2.OA.C.4
- Maine 2.OA.C.4
- Maryland 2.NOS.A.2.b
- Massachusetts 2.OA.C.4
- Michigan 2.OA.C.4
- Minnesota 2.2.1.1
- Mississippi 2.OA.4
- Missouri 2.RA.B.3
- Montana MT.2.OA.4
- Nebraska 2.N.5.c
- Nevada 2.OA.C.4
- New Hampshire 2.OA.C.4
- New Jersey 2.OA.C.4
- New Mexico 2.OA.C.4
- New York NY-2.OA.4
- North Carolina NC.2.OA.4
- North Dakota 2.AR.OA.5
- Ohio 2.OA.4
- Oklahoma 2.N.2.6
- Oregon 2.OA.C.4, 3.OA.A.1
- Pennsylvania CC.2.2.2.A.3
- Rhode Island 2.OA.C.4
- South Carolina 2.PAFR.1.9
- South Dakota 2.OA.C.4
- Tennessee 2.OA.C.4
- Texas 111.4.b.6.A
- Utah 2.OA.4
- Vermont 2.OA.C.4
- Washington 2.OA.C.4
- West Virginia M.2.5
- Wisconsin M.2.OA.C.4