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Step 15 Lesson 5

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Addition & Subtraction


Objectives

To estimate combinations of additions and to check estimate against correct value.

Resources

Abacus 4 Textbooks 1 & 2 | Squared paper


Today's Lesson

Main Activity

Turn to page 95 in Abacus 4 Textbook 1.

Ask your student to follow the instructions for each puzzle and to explain them to you at the end. This is the final page of Textbook 1 and completes the work from this book.