Ray's New Primary Arithmetic · Lesson III · Unit 1: Counting and writing numbers
3. Numbers from 41 to 70
Goal: Your child reads and writes the numbers from forty-one to seventy, and keeps the earlier numbers fresh.
You'll need
- About 20 small counters: dried beans, buttons, pennies or pebbles (the book suggests marbles, beans or pebbles), or bundles of ten (sticks with a rubber band, or cups of ten beans)
- A slate, small whiteboard or paper and pencil
What's in the book
The number words from forty-one to seventy with their figures, on the same page as Lesson II. The note says each lesson should include a review of the ones before it.
The lesson, step by step
Quick review
Ask your child to read five numbers from Lesson II and write three more from your dictation.
Count by tens
Line up bundles or cups of ten and count them together: ten, twenty, thirty, forty, fifty, sixty, seventy.
Build a number
Make 4 tens and 3 ones. Ask: How many tens? How many ones? So it is forty-three, written 43.
Do the same for 56 and 68.
Read the table
Read the new table together, then alone. Stop now and then to ask how many tens and ones.
Write from dictation
Say six numbers between 41 and 70 and have your child write them. Include one or two from the earlier lesson.
Afterwards
Review tomorrow: count by tens to 70, then read the table without help.
Tip
Fifty and sixty end in "-ty" just like the others, but fifty does not sound like "five-ty". Mention it.