What this lesson shows
7 = 9 − 2 with cupcakes: cross out 2 of the 9, and 7 are left. Both sides are 7.
The worked example
The lesson works this one step by step: 7 = 9 − 2. Then your kid tries one like it on paper.
The steps
- Read both sides
- Draw one side
- Count it
- The same? It is true
Helping at home
Read each box aloud. Your kid draws dots for each side, one box per side, counts both, and says true if they match.
If your kid gets stuck
Draw each side. Do they match?
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.1
Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
Matches standards in 46 statesSee each state's code
- Alabama MA19.K.8
- Alaska K.OA.1
- Arizona K.OA.A.1
- Arkansas K.CAR.1.
- California K.OA.A.1
- Colorado K.OA.A.1
- Connecticut K.OA.A.1
- Delaware K.OA.A.1
- District of Columbia K.OA.A.1
- Florida MA.K.NSO.3.1, MA.K.AR.2.1
- Georgia K.NR.5.2
- Hawaii K.OA.A.1
- Idaho K.OA.A.1
- Illinois K.OA.A.1
- Iowa K.OA.A.1
- Kansas K.OA.1
- Kentucky KY.K.OA.1, KY.K.OA.3.b
- Louisiana K.OA.A.1
- Maine K.OA.A.1
- Maryland K.AT.A.1
- Massachusetts K.OA.A.1
- Michigan K.OA.A.1
- Minnesota K.1.2.1
- Mississippi K.OA.1
- Missouri K.RA.A.1
- Montana MT.K.OA.1
- Nebraska K.N.4.a
- Nevada K.OA.A.1
- New Hampshire K.OA.A.1
- New Jersey K.OA.A.1
- New Mexico K.OA.A.1
- New York NY-K.OA.1
- North Carolina NC.K.OA.1.a, NC.K.OA.1.b, NC.K.OA.6
- Ohio K.OA.1
- Oregon K.OA.A.1
- Pennsylvania CC.2.2.K.A.1
- Rhode Island K.OA.A.1
- South Dakota K.OA.A.1
- Tennessee K.OA.A.1
- Texas 111.2.b.3.A, 111.2.b.3.C
- Utah K.OA.1
- Vermont K.OA.A.1
- Virginia 1.CE.1h
- Washington K.OA.A.1
- West Virginia M.K.8
- Wisconsin M.K.OA.A.1