What this lesson shows
Two equal groups, or a pair left over. The ones digit decides.
The worked example
The lesson works this one step by step: 461. Then your kid tries one like it on paper.
The steps
- Tens and hundreds split evenly
- Pair the ones
- One left over: odd
Helping at home
Name the places first. Tens and hundreds always split into two equal groups, so look at the ones. Draw the ones as pairs of dots: one left over means odd, none left over means even.
If your kid gets stuck
Look at the ones digit.
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.
More in this unit
- Equal groups and arrays
- Groups or how many in each?
- Two kinds of division
- Equal jumps on a number line
- Turn the array
- Facts from facts you know
- Add the parts
- One digit times two digits
- Multiply both parts
- Three factors, any order
- Times tens and hundreds
- Counting zeros fails
- One array, four facts
- True or false?
- The answer can go first
- The unknown anywhere
- The ones digit decides
- Is it a multiple?
- A number is its own multiple
- Patterns from a rule
- Position is not value
- Two-step word problems
- Finish the second step
- One pattern, two ways