Download presentation

Presentation is loading. Please wait.

Published byAlonso Mewes Modified over 3 years ago

1
Reciprocals I can… find reciprocals of fractions, whole numbers, and mixed numbers. 7676 6767 1515 2 9 4 38 9 5

2
What is a reciprocal? Webster’s dictionary defines the word as “done, given, or felt equally on both sides”. Examples: The two countries made a reciprocal trade agreement. The two business partners had a reciprocal friendship based on respect for each other.

3
But what does the word reciprocal mean in math? multiply 1 A reciprocal in math is a number you multiply by so that the result is 1. product reciprocal pairs Two numbers whose product is 1 are called reciprocal pairs.

4
product 1 Let’s look at some reciprocal pairs. Notice how when we multiply them, the product is 1. 5 and 1/5 26 and 1/26 1/9 and 9

5
product 1 Here’s more examples of reciprocal pairs. Again, notice how when we multiply them, the product is 1. 2/3 and 3/2 4/15 and 15/4 8/3 and 3/8

6
product 1! One last look at reciprocal pairs. You’re catching on!!! The product is 1! 2 ½ and 2/5 6 ⅗ and 5/33 7 ⅔ and 3/23

7
reciprocals So, now that you know what reciprocals are – how do you find the reciprocal of a number? It’s so easy!!! When you hear reciprocal – RE-FLIP-RO-CAL!!! think RE-FLIP-RO-CAL!!!

12
You think because you simply the fraction to get the reciprocal!

13
Let’s practice finding the refliprocal – uh, I mean reciprocal – of some numbers. 4 15 1 6

14
Some more – 26 9 4 31

15
What if it’s a whole number? Write the whole number as a fraction, then FLIP it! 7 33 whole number written as a fraction reciprocal

16
If it’s a whole number, write the whole number as a fraction, then FLIP it! 16 57 whole number written as a fraction reciprocal

17
Let’s review what we’ve learned so far. Write the reciprocal for each fraction or whole number. 2/55/2 4 1/22/1 or 2 6/10 1/3 10/6 3/1 or 3 1/4 12 55 47 1/12 1/55 1/47

18
Let’s review what we’ve learned so far. Find the missing fraction for each number sentence. 4949 x = 1? 13 1 x ? =

19
Let’s review what we’ve learned so far. Find the missing fraction for each number sentence. 1515 x = 1? 70 1 x ? =

20
There’s one more part to today’s lesson— reciprocal mixed number What to do when finding the reciprocal of a mixed number ? Write the mixed number as an improper fraction Flip the improper fraction 5 ⅓ = 16 3 Now FLIP the improper fraction: 3 16 reciprocal

21
Let’s practice finding the refliprocal of some mixed numbers. 10 6 1 8 2 7 3 5 4 Improper Fraction: Reciprocal

22
Let’s practice finding the refliprocal of some mixed numbers. 30 4 1 3 2 20 7 2 1 Improper Fraction: Reciprocal

23
Let’s review what we’ve learned so far. Find the missing fraction for each number sentence. 1 5 x = 1? 7 1 x ? = 4 3 10

Similar presentations

Presentation is loading. Please wait....

OK

Year 6 mental test 10 second questions

Year 6 mental test 10 second questions

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on eddy current test Ppt on producers consumers and decomposers in the forest Ppt on schottky diode Download ppt on the poem the road not taken Ppt on bluetooth based smart sensor networks pdf Conceptual architecture view ppt on android Ppt on fundamental rights and duties Ppt on structure and physiography Ppt on safe home security system Ppt on meaning of educational technology