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Lesson 4: Subtraction
Victor 900 Calculator Teacher’s Guide
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TEACHER’S GUIDE
Lesson 4: Subtraction
Overview Use the calculator to subtract numbers.
Teacher Materials “Subtraction” transparency.
Student Materials Pencil, Calculator, and “Calculator Connections II”,
and “Big Number Math” worksheets.
Keys Introduced - (minus key)
Teaching Notes Display the “Subtraction” transparency.
The “Calculator Connections” worksheet provides
additional practice. Ask students to solve each
subtraction problem with the calculator and connect
the box with the correct answer by drawing a line.