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Lessons 95 and 96

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on 1 March 2018

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Transcript of Lessons 95 and 96

Lessons 95 and 96
Objective
: Find a reciprocal of a whole number of a fraction. Use reciprocals to divide fractions.

Math 4 Today
1) Round 4.392 to the 2) What is the volume of
nearest tenth? this figure?

3) Eric is 6 feet 2 inches tall. 4) Write six and one hundred
His brother is 4 feet 9 inches eighty-thousandths in standard
tall. How many inches taller form.
is Eric than his brother?
Reciprocals
If we switch the numerator and denominator of a fraction, the new fraction is the
reciprocal
.
When we switch the positions of the numerator and denominator, we
invert
the fraction.
2 3 = 1
3 2
Example 1
What is the reciprocal of 5 ?
8
Example 2
What is the product of 1 and its reciprocal? 3
Example 3
What is the reciprocal of 4?
Example 4
Divide 1 3
4
Example 5
Divide 2 1
3 2
Example 6
Divide: 2 2
3
Lesson Practice
a) 1 1 = b) 2 3 = c) 2 1 =
3 2 3 4 3 4

d) 1 1 = e) 3 2 = f) 3 3 =
2 3 4 3 4

g) 2 1 = h) 3 2 = i) 10 5 =
3 3 6
Reflection
: Virgil has 1/6 of a birthday cake left over. He wants to share the leftover cake with 3 friends. What fraction of the original cake will each of the 4 people receive? Draw a picture to support your response.

____ _____ =_____

____ X _____ = _____

____ _____ = _____

____ X _____ = _____
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