What this lesson shows
Fixes a mistake
8 can be 4 and 4. Two parts the same size are a way to make 8 too.
The worked example
The lesson works this one step by step: 8 as 4 and 4. Then your kid tries one like it on paper.
The steps
- List the ways
- Try the same number twice
- Half filled, half empty
- That is a way too
Helping at home
Read each box aloud. Your kid counts the empty counters and writes the missing part. Some boxes have two parts the same: 3 and 3, 4 and 4. Those count too.
If your kid gets stuck
The two parts can be the same number.
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