Math Review :)

Integers

100

(-3) - (+5)

(-8)

200

What is an integer?

An integer is a whole number with a positive or negative sign. The number is the distance from zero and the -/+ is if it comes before or after 0!

300

What is a zero pair? 

Two opposite numbers whose sum is equal to zero!

400

Which is greater- l-1l or (1)

They are both equal

this is because two vertical bars next to an integer represent absolute value, meaning l-1l becomes 1

500

(-13) + (+4) - (+72) + (-6) - (-444) + (1999)

2356

BEDMAS

100

What does BEDMAS stand for?

Brackets, Exponents, Division, Multiplication, Addition, Subtraction

200

(6-5) + 12

13

300

(8-5)+ (3 x 4) 

15

400

(3 x 4) divided by (7+9-10) 

the answer is 2

500

12.376 divided by (4.75+1.2) + 2.45 x 0.2 - 1.84

0.73

Equations

100

5h+3=28

h = 5

200

What is a variable

A symbol for a number that we do not know. Usually a lowercase letter.

300

a=3  b=5  c=2  d=10

(b+d)/a

5

400

Jenna worked at a Dollarama for x hours. Each hour you work, you get $7. If she earns $42 a day, how many hours does she work for?

x = 6 hours

500

92h + 3= 371

h= 4

Decimals

100

0.20 + 0.04

0.24

Fractions & Percents

100

If you grated 2/3 of a block of cheese to make macaroni. What fraction of the block is left?

1/3

200

6/9 + 2/3

12/9 or 1 3/9

300

Bob paid $27.26 at a restaurant. He left a 10% tip. How much did it cost if you add the tip to the cost?

29.99