Ray's New Primary Arithmetic · Lesson LXXVIII · Unit 7: Signs, bigger numbers and mixed problems
78. Counting by 2s to 9s, forward and back
Goal: Your child counts forward and back by any number from 2 to 9.
You'll need
- A hundred chart (optional; easy to draw)
What's in the book
Exercises such as "Begin with 2, and add by 2's to 100", "Begin with 100, and subtract by 3's to 1" and "Begin with 100, and subtract by 7's to 2."
The lesson, step by step
Use a hundred chart
Color the numbers you land on counting by 3s. Look at the pattern.
Forward and back
Do the exercises on the page, a few each day. Counting back by 7s is hard; take your time.
Afterwards
Unit 7 is done.