What this lesson shows
5 counters, some filled and some empty: 4 and 1, 3 and 2, 2 and 3, 1 and 4, then 5 and 0.
The worked example
The lesson works this one step by step: 5 as 4 and 1. Then your kid tries one like it on paper.
The steps
- Fill some in
- Leave the rest empty
- The two parts make the number
- Turned around, still the same
Helping at home
Read each box aloud. Your kid counts the empty counters and writes the missing part. With 5 pennies in two hands, ask "how many in this hand?"
If your kid gets stuck
Count the empty ones. That is the other part.
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.3
Decompose numbers less than or equal to 10 into pairs in more than one way, e.g., by using objects or drawings, and record each decomposition by a drawing or equation (e.g., 5 = 2 + 3 and 5 = 4 + 1).
Matches a standard in all 50 states and DCSee each state's code
- Alabama MA19.K.10
- Alaska K.OA.3, K.OA.4
- Arizona K.OA.A.3
- Arkansas K.CAR.2
- California K.OA.A.3
- Colorado K.OA.A.3
- Connecticut K.OA.A.3
- Delaware K.OA.A.3
- District of Columbia K.OA.A.3
- Florida MA.K.AR.1.2
- Georgia K.NR.5.1
- Hawaii K.OA.A.3
- Idaho K.OA.A.3
- Illinois K.OA.A.3
- Indiana K.CA.2
- Iowa K.OA.A.3
- Kansas K.OA.3
- Kentucky KY.K.OA.3.a
- Louisiana K.OA.A.3
- Maine K.OA.A.3
- Maryland K.NOS.D.11
- Massachusetts K.OA.A.3
- Michigan K.OA.A.3
- Minnesota K.1.2.2
- Mississippi K.OA.3
- Missouri K.RA.A.3
- Montana MT.K.OA.3
- Nebraska K.N.4.b
- Nevada K.OA.A.3
- New Hampshire K.OA.A.3
- New Jersey K.OA.A.3
- New Mexico K.OA.A.3
- New York NY-K.OA.3
- North Carolina NC.K.OA.2.b, NC.K.OA.3
- North Dakota K.AR.OA.3
- Ohio K.OA.3
- Oklahoma K.N.2.1
- Oregon K.OA.A.3
- Pennsylvania CC.2.2.K.A.1
- Rhode Island K.OA.A.3
- South Carolina K.PAFR.1.3, 1.PAFR.1.2
- South Dakota K.OA.A.3
- Tennessee K.OA.A.3
- Texas 111.2.b.2.I
- Utah K.OA.3
- Vermont K.OA.A.3
- Virginia K.CE.1a, K.CE.1b, K.CE.1c, K.CE.1d
- Washington K.OA.A.3
- West Virginia M.K.10
- Wisconsin M.K.OA.A.3
- Wyoming K.OA.3