What this lesson shows
27 + 13 = 26 + 14 is true. 26 is one less than 27, and 14 is one more than 13.
The worked example
The lesson works this one step by step: 27 + 13 = 26 + 14. Then your kid tries one like it on paper.
The steps
- Compare the first numbers
- Compare the second numbers
- One less, one more: the same total
- Check by adding each side
Helping at home
Compare the first numbers, then the second numbers. If one went down and the other went up by the same amount, the totals match: true. If not, false. Then check by adding each side.
If your kid gets stuck
Compare the numbers, then check.
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.