What this lesson shows
A bus has 27 kids. 12 get off, then 8 more get off at the next stop: 27 − 12 = 15, and 15 − 8 = 7.
The worked example
The lesson works this one step by step: 27 on the bus, −12, −8. Then your kid tries one like it on paper.
The steps
- What do we find?
- Step 1: the first stop
- Step 2: the next stop
- Check by working back
Helping at home
Read the story twice and say what the question asks. Write one equation for each stop, then check by working back to the first number.
If your kid gets stuck
What happens at each stop?
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 2.OA.A.1
Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.
Matches standards in 50 statesSee each state's code
- Alabama MA19.2.1
- Alaska 2.OA.1
- Arizona 2.OA.A.1
- Arkansas 2.CAR.7
- California 2.OA.A.1
- Colorado 2.OA.A.1
- Connecticut 2.OA.A.1
- Delaware 2.OA.A.1
- District of Columbia 2.OA.A.1
- Florida MA.2.AR.1.1
- Hawaii 2.OA.A.1
- Idaho 2.OA.A.1
- Illinois 2.OA.A.1
- Indiana 2.CA.1
- Iowa 2.OA.A.1
- Kansas 2.OA.1
- Kentucky KY.2.OA.1
- Louisiana 2.OA.A.1
- Maine 2.OA.A.1
- Maryland 2.AT.A.1, 2.AT.A.2
- Massachusetts 2.OA.A.1
- Michigan 2.OA.A.1
- Minnesota 2.1.2.5, 2.2.2.1, 2.2.2.2
- Mississippi 2.OA.1
- Missouri 2.NBT.C.11
- Montana MT.2.OA.1
- Nebraska 2.N.5.a, 2.N.5.b
- Nevada 2.OA.A.1
- New Hampshire 2.OA.A.1
- New Jersey 2.OA.A.1
- New Mexico 2.OA.A.1
- New York NY-2.OA.1.a, NY-2.OA.1.b
- North Carolina NC.2.OA.1.a.1, NC.2.OA.1.b.1, NC.2.OA.1.b.2
- North Dakota 2.AR.OA.3, 2.AR.OA.4
- Ohio 2.OA.1
- Oklahoma 2.N.2.5, 2.A.2.2
- Oregon 2.OA.A.1
- Pennsylvania CC.2.2.2.A.1
- Rhode Island 2.OA.A.1
- South Carolina 2.PAFR.1.3
- South Dakota 2.OA.A.1
- Tennessee 2.OA.A.1
- Texas 111.4.b.4.C, 111.4.b.4.D, 111.4.b.7.C
- Utah 2.OA.1
- Vermont 2.OA.A.1
- Virginia 2.CE.1c
- Washington 2.OA.A.1
- West Virginia M.2.1
- Wisconsin M.2.OA.A.1
- Wyoming 2.OA.1