Numbers and Operations - Unit 1 (Math 7)

Absolute value

100

l-5l - |6|

-1

200

13 + l-67l

80

300

l-8l + |4|

12

400

40 - l500l

-460

500

2l15l - 3|-12|

-6

Adding Integers

100

-9+2

7

200

-12+(-6)

-18

300

-10+19+5

14

400

Use mental math. x + 10 = 4

x=-6

500

Use mental math. y + 6 = -2

y= -8

Mixed

100

4-7

-3

200

9-5-8

-4

300

-4-6

-10

400

-2-3-(-3)

-2

500

-6-(-9)

3

Definitions & Rules

100

How do you add integers with same signs?

Add then keep the common sign.

200

What are integers?

An integer is a number with no decimal or fractional part and it includes negative and positive numbers, including zero.

300

Define "absolute value".

Absolute Value- The distance on a number line from zero to the integer

400

How do you add integers with unlike signs?

Subtract the absolute values and keep the sign of the larger number.

500

What are the three methods in adding integers?

Using concrete models (color counters)

Using pictorial models (number lines)

Using numerals (rules-based)