Ray's New Primary Arithmetic · Lesson LXXI · Unit 7: Signs, bigger numbers and mixed problems
71. Multiply, then subtract
Goal: Your child multiplies, then subtracts, such as 3 × 4 − 5.
You'll need
- A slate, small whiteboard or paper and pencil
What's in the book
Questions such as "How many are 3 × 4 − 5?" (worked: 3 multiplied by 4 equals 12, and 12 minus 5 equals 7), later with an added step.
The lesson, step by step
Order matters
Explain that the book always multiplies first here: 3 × 4 = 12, then 12 − 5 = 7.
Book questions
Work down the page.
Afterwards
A few a day.