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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 49 in Abacus 4 Textbook 3.

Remind your student of the Frog method of subtraction by counting up, first to the next multiple of 10, then to the 100s. Frog Method (YouTube)

Using Frog, ask your student to copy and complete the calculations on the page.

Citations

[1] www.youtube.com