Addition & Subtraction

Objectives

To apply learnt strategies for mental calculations involving addition and subtraction and to establish a favoured method.

Resources

Abacus 4 Textbook 3 | Squared paper | Frog Method (YouTube)

Today's Lesson

Main Activity

Turn to page 50 in Abacus 4 Textbook 3.

Ask your student to use Frog to copy and complete the subtractions 1 – 12. Watch Frog Method (YouTube) if needed.

The word problems are also subtractions, so your student can still use Frog, but remind them to include the unit of measure and a word sentence as well as the calculation answer.

Citations

[1] www.youtube.com