What this lesson shows
Fixes a mistake
A plant grows from 24 to 37 inches. It grew 37 − 24 = 13 inches, not 24 + 37.
The worked example
The lesson works this one step by step: 24 inches and 37 inches, how much more. Then your kid tries one like it on paper.
The steps
- Two heights
- Grew means the difference
- Check by adding
Helping at home
How much something grew is the difference between its heights: take the first height from the second. Check by adding the growth to the first height.
If your kid gets stuck
Find the difference.
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.MD.B.5
Use addition and subtraction within 100 to solve word problems involving lengths that are given in the same units, e.g., by using drawings (such as drawings of rulers) and equations with a symbol for the unknown number to represent the problem.
Matches standards in 42 statesSee each state's code
- Alabama MA19.2.21
- Alaska 2.MD.5
- Arizona 2.MD.B.5
- Arkansas 2.GM.6
- California 2.MD.B.5
- Colorado 2.MD.B.5
- Connecticut 2.MD.B.5
- Delaware 2.MD.B.5
- District of Columbia 2.MD.B.5
- Florida MA.2.M.1.3
- Hawaii 2.MD.B.5
- Idaho 2.MD.B.5
- Illinois 2.MD.B.5
- Iowa 2.MD.B.5
- Kansas 2.MD.5
- Kentucky KY.2.MD.5
- Louisiana 2.MD.B.5
- Maine 2.MD.B.5
- Massachusetts 2.MD.B.5
- Michigan 2.MD.B.5
- Mississippi 2.MD.5
- Missouri 2.GM.C.8
- Montana MT.2.MD.5
- Nebraska 2.G.4.b
- Nevada 2.MD.B.5
- New Hampshire 2.MD.B.5
- New Jersey 2.M.B.5
- New Mexico 2.MD.B.5
- New York NY-2.MD.5
- North Carolina NC.2.MD.5
- Ohio 2.MD.5
- Oregon 2.GM.C.8
- Pennsylvania CC.2.4.2.A.6
- Rhode Island 2.MD.B.5
- South Dakota 2.MD.B.5
- Tennessee 2.MD.B.5
- Texas 111.4.b.9.E
- Utah 2.MD.5
- Vermont 2.MD.B.5
- Washington 2.MD.B.5
- West Virginia M.2.19
- Wisconsin M.2.MD.B.5