What this lesson shows
Fixes a mistake
5 + 3 = 8 + 2 is false. The equal sign is not "the answer is".
The worked example
The lesson works this one step by step: 5 + 3 = 8 + 2. Then your kid tries one like it on paper.
The steps
- Work out the left side
- Work out the whole right side
- Not the same: false
Helping at home
Cover the right side and work out the left, then the whole right side. Write each value under its side. Only the same value on both sides makes it true.
If your kid gets stuck
Work out the whole right side too.
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 1.OA.D.7
Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? 6 = 6, 7 = 8 - 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2.
Matches standards in 49 statesSee each state's code
- Alabama MA19.1.7
- Alaska 1.OA.7
- Arizona 1.OA.D.7
- Arkansas 1.CAR.8
- California 1.OA.D.7
- Colorado 1.OA.D.7
- Connecticut 1.OA.D.7
- Delaware 1.OA.D.7
- District of Columbia 1.OA.D.7
- Florida MA.1.AR.2.2, MA.4.AR.2.1
- Georgia 3.PAR.3.4, 1.NR.2.5
- Hawaii 1.OA.D.7
- Idaho 1.OA.D.7
- Illinois 1.OA.D.7
- Iowa 1.OA.D.7
- Kansas 1.OA.7
- Kentucky KY.K.OA.3.b, KY.1.OA.7
- Louisiana 1.OA.D.7
- Maine 1.OA.D.7
- Maryland 1.AT.A.1
- Massachusetts 1.OA.D.7
- Michigan 1.OA.D.7
- Minnesota 1.2.2.2
- Mississippi 1.OA.7
- Missouri 1.RA.A.3
- Montana MT.1.OA.8
- Nebraska 1.N.5.a
- Nevada 1.OA.D.7
- New Hampshire 1.OA.D.7
- New Jersey 1.OA.D.7
- New Mexico 1.OA.D.7
- New York NY-1.OA.7
- North Carolina NC.1.OA.7
- North Dakota 1.AR.OA.6
- Ohio 1.OA.7
- Oklahoma 1.N.2.2, 4.A.2.3
- Oregon 1.OA.D.7
- Rhode Island 1.OA.D.7
- South Carolina 1.PAFR.1.1, 2.PAFR.1.2
- South Dakota 1.OA.D.7
- Tennessee 1.OA.D.7
- Texas 111.3.b.5.E
- Utah 1.OA.7
- Vermont 1.OA.D.7
- Virginia 1.CE.1h, 1.CE.1i, 1.CE.1j, 1.CE.1k, 2.CE.1i, 3.CE.1d, 4.CE.2c, 4.CE.2d
- Washington 1.OA.D.7
- West Virginia M.1.7
- Wisconsin M.1.OA.D.7
- Wyoming 1.OA.7