What this lesson shows
7 + 2 and 2 + 7 in cubes. Same cubes, same total: 9.
The worked example
The lesson works this one step by step: 7 + 2. Then your kid tries one like it on paper.
The steps
- Make a train
- Count it
- Turn it around
- Same cubes, same total
Helping at home
Read each box aloud. After your kid finds the answer, ask them to say the fact turned around: "3 + 5 and 5 + 3 both make 8." Use blocks to check.
If your kid gets stuck
Turned around, the total is the same.
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 K.OA.A.2
Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
Matches standards in 50 statesSee each state's code
- Alabama MA19.K.9
- Alaska K.OA.2
- Arizona K.OA.A.2, K.NBT.B.2
- Arkansas K.CAR.1., K.CAR.4, K.CAR.5
- California K.OA.A.2
- Colorado K.OA.A.2
- Connecticut K.OA.A.2
- Delaware K.OA.A.2
- District of Columbia K.OA.A.2
- Florida MA.K.NSO.3.1, MA.K.NSO.3.2, MA.K.AR.1.3
- Georgia K.NR.5.2, K.NR.5.3
- Hawaii K.OA.A.2
- Idaho K.OA.A.2, K.OA.A.5
- Illinois K.OA.A.2
- Indiana K.CA.1
- Iowa K.OA.A.2, K.OA.A.5
- Kansas K.OA.2
- Kentucky KY.K.OA.2
- Louisiana K.OA.A.2
- Maine K.OA.A.2
- Maryland K.AT.A.2
- Massachusetts K.OA.A.2
- Michigan K.OA.A.2
- Minnesota K.1.2.1
- Mississippi K.OA.2, K.OA.5a, K.OA.5b
- Missouri K.RA.A.1
- Montana MT.K.OA.2, MT.K.OA.5
- Nebraska K.N.4.a, K.N.4.d, K.N.4.e
- Nevada K.OA.A.2
- New Hampshire K.OA.A.2
- New Jersey K.OA.A.2
- New Mexico K.OA.A.2
- New York NY-K.OA.2.a, NY-K.OA.2.b
- North Carolina NC.K.OA.2.a, NC.K.OA.2.b
- North Dakota K.AR.OA.4, K.AR.OA.5
- Ohio K.OA.2
- Oregon K.OA.A.2, K.OA.A.5
- Pennsylvania CC.2.2.K.A.1
- Rhode Island K.OA.A.2
- South Carolina K.PAFR.1.4, K.PAFR.1.1
- South Dakota K.OA.A.2.a, K.OA.A.2.b
- Tennessee K.OA.A.2, K.OA.A.5
- Texas 111.2.b.3.B, 111.2.b.3.C
- Utah K.OA.2
- Vermont K.OA.A.2
- Virginia K.CE.1f
- Washington K.OA.A.2
- West Virginia M.K.9, M.K.12
- Wisconsin M.K.OA.A.2
- Wyoming K.OA.2