Download presentation

Presentation is loading. Please wait.

Published byLanden Wheetley Modified over 2 years ago

1
Do Now Depressions in the ocean floor are called trenches, which are the deepest parts of the ocean. Time for Kids 9/26/14 (Thanks Krista) Mariana Trench: 36,070 ft Tonga Trench: 35,702 ft Red= only if you have time 1.) Convert the depth of the Mariana Trench to inches. 2.) Find the depth difference of the two trenches. 3.) Find the total ft. of the trenches. Convert to miles.

2
10/1/2014 2-1 B Intro to Fractions & Estimating Products In this section, we will learn how to estimate products of fractions using compatible numbers and rounding.

3
Fraction- part of a whole

4
Method: For estimating a product of a fraction & whole number use compatible numbers (FDC) – Looking for “quick” & “easy” numbers

5
Remember… Compatible numbers: – numbers that are close in value to the actual numbers and easy to add, subtract, multiply, or divide mentally

6
Example 1 Find a multiple of 5 close to 28. 30 and 5 are compatible numbers since 30 ÷ 5 = 6. 6

7
Example 2 16 and 4 are compatible numbers since 16 ÷ 4 = 4.

8
Method for estimating products of fractions Rounding to 0, ½, or 1 -If the numerator is -almost as large as the denominator, round up ⅞ rounds to 1 -much smaller than the denominator, round down ⅛ rounds to 0

9
Example 3 → 1 × 0 1 × 0 = 0

10
Example 4 Estimate the area of the square. → 7 × 7 = 49 The area is about 49 in 2. Round to the nearest whole number.

11
Exit Ticket: Your Turn

12
1) 2) 3) 4) 11 × 11 = 121; about 121 ft 2

13
Homework Pg.93 #1-26 Evens Ch. 1 Quiz Corrections due tomorrow!

Similar presentations

OK

Fractions A quick help for those who have forgotten how to work with them.

Fractions A quick help for those who have forgotten how to work with them.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ear anatomy and physiology ppt on cells Free ppt on forest society and colonialism Ppt on edge detection method Ppt on brand marketing specialist Ppt on abstract art prints Ppt on gujarati culture society Ppt on contact dermatitis treatment Ppt on point contact diode construction Ppt on complex numbers class 11th accounts Download ppt on national festivals of india