Variables and Expressions
the sum of 12 and 8
12+8=20
What does PEMDAS stand for?
Parenthesis, Exponents, Multiplication, Division, Addition and Subtraction
(4.8 / 2) x 5
12
Ms. P's Picture
-13
Marissa earned $480 in the summer. If she earned $40 a week, how many weeks did she work?
12 weeks
7 less than 21
21-7=14
6 + 3 x 2
= 12
3.6 + (3 x 9.6 - 4.8)
27.6
Ms. P's Picture
+4
A public pool opened for the summer. A total of 246 people came swimming over the first 3 days it was open. On the first day, 79 came to swim. On the second day, 104 people swam. How many people swam on the third day?
63 people
24 divided by 4
24 / 4 = 6
5 - 2 + 4 x 3
15
[(6.2 x 8.4) - 9.28]
42.8
Ms. P's Picture
Divided by 8
Christina collects stamps. She has 47 stamps in all. She has 20 stamps from Europe. The number of African stamps is 2 times the number of Asian stamps. How many stamps from each of these three continents does she have?
20 European, 18 African, 9 Asian; 20 1 18 1 9
5 times 13 subtracted from 15
5 x 15-13
[10 –2 + (6 – 2)] ÷ 2
6
[7 x (9.6 / 3)] + 12.4
34.8
Ms. P's Picture
x 4
Brian has a model collection of cars, trains, and fire engines. He has 28 cars. The number of fire engines is 2 times the number of trains. He has 67 models in all. How many of each type of model does he have?
67 models: 28 cars, 13 trains, 26 fire engines.
The product of 2 and 45 plus 3
2 x 45 + 3
32 + [6 . (11 + 1 – 4)] - 8 x 2
41
36 - 9 / [(0.24 x 5) 1 (0.66 x 5)]
34
Ms. P's Picture
Rule A and Rule B & Complete table
Rule A- Subtract 2
Rule B- Subtract 2
Complete table 14,34
Nancy runs a dog obedience school. There are 58 dogs enrolled in the school. There are 22 dogs in obedience class. There are 1/2 as many dogs in competition as there are in agility class. How many dogs are in each class?
58 dogs: 22 obedience, 12 competition, 24 agility.