Order of Operations
8+3x4
20
8
6.8
I am a number.
If you multiply me by 3 and then subtract 5, you get 16.
What number am I?
7
−7+12−5= ?
0
(15−7)×5
40
3x=27
9
6.33
A number is increased by 1/2 of itself, and the result is 18.
What is the number?
12
3/4+2/3=?
1 5/12
24÷6+2×7
18
x−12=9
21
16
Find the missing number:
3, 7, 15, 31, __, 127
(Hint: look at how the numbers grow, not just simple addition)
63
A shirt costs $40 and is on sale for 25% off.
What is the sale price?
$30
18−(4+2)×3
0
6
15.75÷3
5.25
A bottle has some liters of juice.
You pour out 2.5 liters, then divide what remains equally into 3 containers of 1.5 liters each.
How much juice was in the bottle at the start?
7
5x−7=3x+9
8
36÷(3+3)+5×(2+4)
36
3(x−2)=24
10
(8.6−2.45)×1.2
7.38
I am a number.
If you subtract 4, multiply by 5, then divide by 2, you get 25.
What number am I?
14
A school has 360 students.
13\frac{1}{3}31 are in 7th grade.
Of the 7th graders, 56\frac{5}{6}65 are in clubs.
How many 7th graders are not in clubs?
20 students