Download presentation

Presentation is loading. Please wait.

Published byShawn French Modified over 2 years ago

1
**Warm-up Check homework Odds w/book Evens with a neighbor**

“We cannot hold a torch to light another’s path without brightening our own.” – Ben Sweetland Check homework Odds w/book Evens with a neighbor Sections 2.1 – 2.4 No more than 5 minutes! Warm-up

2
**2.5 Multiplication of Integers**

Properties of Multiplication a * b = b * a The order of 2 numbers being multiplied does not matter. 1 * a = a The product of one & a number is that number. 0 * a = 0 The product of zero & a number is zero.

3
**The product of a number and -1 is the opposite of that number.**

-1 * a = -a The product of a number and -1 is the opposite of that number. a * -b = -ab The product of a and –b is the opposite of ab. Multiplying 2 numbers with different signs is ALWAYS a negative answer. -a * - b = ab The product of –a and –b is ab. Multiplying 2 numbers with the same sign is ALWAYS a positive answer.

4
examples -3 * -2 * -4 = -4 * x * -12 = (-x)3 = (-x)2 = (-2)4 = -24 =

5
**Sect. 7 – Division of Real #**

The integer rules for division are the same as for multiplication. Same signs = positive answer -20/-4 = 5 Different signs = negative answer -20/4 = -5

6
**Division can be written as multiplication. **

Reciprocals – numbers when multiplied together equal 1 (excluding 1 * 1) Reciprocal of a/b is b/a Reciprocal of 4 is ¼ Division w/reciprocals To divide “a” by “b”, you can multiply by the reciprocal of “b” and get the same answer. 20/4 is the same as 20 * 1/4

7
**Write the division as multiplication & solve**

3/5 divided by 2 = 3/5 * ½ = 3/10 3x divided by 1/3 = 3x * 3 = 9x -x / (-6) = -x * (-1/6) = x/6

8
**Simplifying a quotient**

Change to multiplication (32x – 8)/4 = (32x – 8) ¼ = ¼(32x) – ¼(8) = 8x – 2 (32x – 8)/4 = (another easy way) 32x/4 – 8/4 = 8x - 2

9
Try these 6/7 divided by 3 = 6/21 4x divided by 3 = 4x/3 (12x + 28)/4 = 3x + 7

10
Questions? Mid-chp quiz tomorrow Need to see some of you

Similar presentations

OK

Warm-up Answer the following: – Addition of integers 1) 3 + (-8) = 2) – 6 + 9 = 3) – 5 + (-4) = 4) 5 + (-3) 5) – 7 + 11 – Subtraction of integers 6) 7.

Warm-up Answer the following: – Addition of integers 1) 3 + (-8) = 2) – 6 + 9 = 3) – 5 + (-4) = 4) 5 + (-3) 5) – 7 + 11 – Subtraction of integers 6) 7.

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on world book day books Ppt on review of literature paper Ppt on networking topics Ppt on game theory operations research Ppt on event driven programming Ppt on particles of matter attract each other Ppt on area related to circles for class 10 Ppt on dairy milk silk Ppt on javascript events ios Ppt on airline industry in india