Review 3.2 Write as a fraction 20 6 2/3 Write decimal as a fraction or mixed fraction -7.15 .18 Identify as whole, integer, or rational -6 2/3 8 1/5 Simplify.

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Presentation transcript:

Review 3.2 Write as a fraction 20 6 2/3 Write decimal as a fraction or mixed fraction -7.15 .18 Identify as whole, integer, or rational -6 2/3 8 1/5 Simplify the fractions 5/15 12/26

3.3/4 Mult./Div. Fractions Objective: students will show an understanding on how to multiply and divide fractions.

Information Multiplication of fractions Multiply numerator Multiply denominator Reduce Multiplicative inverse: multiplying by reciprocal Division of Fractions (multiply by reciprocal) Reciprocal: flip number so product is 1. (multiplicative inverse) To divide: Keep it (1st fraction) Switch division to multiplication Flip 2nd fraction Multiply and reduce

Multiplicative Inverse 2/3 5 8/9 1/4

Examples 2/4 x 7/8 3/5 x -12

Examples Cont’d 7/10 ÷ 2/3 3/4 ÷ 4/7

ST: Examples 3/5 ÷ 15 8/9 ÷ 4/5 5/6 x 3/8 3 x 2/5

Mixed fractions 1 1/4 x 1 2/3 -2 ¼ ÷ 2 2/5

St: Mixed numbers 4 1/6 ÷ -1 2/3 -2 2/7 x 1 1/2

Variables m/3 x -12/5 1/10 / 5n/9

St: Variables 3y/4 x 5/9 5/3ab / 1/15abc

Wrap-up Questions/Comments Hw: workbook pg. 31/33

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