What this lesson shows
1.5 + n < 10. Try n = 2.8: 4.3 is less than 10, so it is true. Try n = 9.2: 10.7 is not less than 10, so it is false. A story: Sam spends less than his $10. 3 × n = 24 tells of 3 bags of n apples, true for n = 8. 5 + 6 = 4 + □ makes the box 7; 3 × 8 < 3 × □ needs a box more than 8.
The worked example
The lesson works this one step by step: 1.5 + n < 10, for n = 2.8. Then your kid tries one like it on paper.
The steps
- Put the number in for the letter
- Work out that side
- Compare: true or false
Helping at home
Put the given number in place of the letter, work out that side, then compare. < means less than and > means more than. Ask your kid to tell a short story that fits one of the problems.
If your kid gets stuck
Put the number in for n, work it out, then compare.
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.