Download presentation

Presentation is loading. Please wait.

Published byStephen Page Modified over 3 years ago

2
35 Adding Fractions Add 1 1 2 Estimate the sum x = 5 5 8 8 40 32 40 67 = 12740 Find the least common denominator ~...(find the LCM of 8 and 5).. ~ 8: 8, 16, 24, 32, 40 ~ 5: 5, 10, 15, 20, 25, 30, 35, 40 ~ The LCM is 40. Change both denominators to 40...then change both numerators Add the new numerators, then keep the denominator the same. mixed number Convert to a mixed number. Is the sum close to the estimate? 40

3
Adding Fractions

4
18 Adding Mixed Numbers Add 2 4 6 Estimate the sum x = 2 2 5 5 20 5 23 = 1 320 Find the least common denominator ~...(find the LCM of 10 and 4).. ~ 10: 10, 20, 30, 40 ~ 4: 4, 8, 12, 16, 20... ~ The LCM is 20. Change both denominators to 20...then change both numerators Add the new numerators, then keep the denominator the same. mixed number Convert to a mixed number. Is the sum close to the estimate? 20 9 10 1 1414 4 Add the whole numbers to the sum. + 5 6 320

5
39 Subtracting Fractions Subtract 1 1 0 Estimate the difference x = 3 3 7 7 42 35 42 4 221 Find the least common denominator ~...(find the LCM of 14 and 6) ~ 14: 14, 28, 42, 56, 70, 84... ~ 6: 6, 12, 18, 24, 30, 36, 42... ~ The LCM is 42. Change both denominators to 42...then change both numerators Subtract the new numerators, then keep the denominator the same. Simplify by finding the GCF ~ 4: 1, 2, 4 ~ 42: 1, 2,... Is the sum close to the estimate? 42 13 14 – 5656 – ÷ = 2 2 –

6
Subtracting Fractions

7
Rewrite each mixed number by borrowing. 4 9 4 Take one from 4 (now you have 3...)...then add it back to the fraction \ 3 9999 + = 13 9 3 Remember: 1 = 9999 Subtracting Mixed Numbers 7 11 2 18 11 1 = 2323 1 5353 = 5959 8 14 9 7 = 3838 10 11 8 9 =

8
16 Subtracting Mixed Numbers 8 7 1 Estimate the difference x = 8 8 3 3 24 21 24 19 19 24 24 Find the least common denominator ~...(find the LCM of 3 and 8).. ~ 3: 3, 6, 9, 12, 15, 18, 21, 24 ~ 8: 8, 16, 24 ~ The LCM is 24. Change both denominators to 24...then change both numerators Subtract the new numerators, then keep the denominator the same. 2323 7 7878 6 – To avoid negative fraction, let’s borrow from the whole number Take one from 7 (now you have 6...)...then add it back to the fraction \ 6 24 += 40 24 – Is the estimate close to the difference?

9
Adding Mixed Numbers Subtracting Mixed Numbers

10
4 9 4 9 Estimate the product. 4 9 = 36 Convert each to a simple fraction 40 9 1 = \ \ 1 1 40 1 = 40 Cross-simplify. Multiply numerators, then denominators Simplify the product. Multiplying Fraction and Mixed Numbers 40 9 1

11
Multiplying Fraction and Mixed Numbers

12
Dividing Fractions and Mixed Numbers 1. 4747 4747 7474 2.1010 1 11 8 1 10 8 11 3. 3838 1 Original number FractionReciprocal 4. 1212 = 2 5. 6 1616 = 6. 1 = 1 7. 2525 1 5757 =

13
3 8 5 ÷ 9 Estimate the quotient. 5 ÷ 9 1212 Convert each to a simple fraction 5 1 ÷ 75 8 = \ \ 1 17 17 8 17 Cross-simplify. Multiply numerators, then denominators Dividing Fractions and Mixed Numbers 5151 8 75 Keep the first fraction the same Change the division to multiplication Flip the 2 nd fraction

14
Dividing Fractions and Mixed Numbers

Similar presentations

© 2019 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google