Decimal Operations
(no calculator)
(no calculator)
5.4-2.8
2.6
Give the first 5 multiples of 7
7, 14, 21, 28, 35
x2 + 5 when x = 4
(4)(4) + 5
16 + 5
21
x - 3 = 18
x = 21
The Math book has 1533 pages is the first part and x pages in the answer section. Write an expression to show how many pages it has?
1533 + x
12x1.1
13.2
Least Common Multiple of 4 and 7
28
Simplify the expression
2x + y + 3x
5x + y
x + 5 = 43
x = 38
Chris is buying some generators. The generators cost $1,200 each and she needs 11 of them. How much will it cost her?
It will cost her $13,200.
8.2 x 2
16.4
Give the first 10 Multiples of 9
9, 18, 27, 36, 45, 54, 63, 72, 81, 90
Simplify
2(x + 18)
2(x) + 2(18)
2x +36
6x = 72
x = 12
Six candy bars cost $3. Four candy bars cost $1.50. Which is the better buy?
Four candy bars for $1.50 costs 37.5 cents per candy bar. Six candy bars for $3 costs $0.50 per bar. Four is cheaper per bar, making it the better buy.
41.44 / 0.16
259
What is the Greatest common factor of 120 and 25?
5
2x2 - 4x when x = 5
2(5)(5) - 4(5)
2(25) - 20
50 - 20
30
x/8 = 4
x = 32
Bob is five years older than Karen. Bob is 36 years old. How old is Karen? Write an equation to solve.
K + 5 = 36
k = 31
75.32 / 1.4
53.8
What is the LCM of 10 and 6?
30
Simplify
2y + 4x + 11 - 3x + 6y - 8
2y + 6y + 4x - 3x + 11 - 8
8y + 1x + 3
42/x = 7
x = 6
Jake runs 4 miles in 48 minutes. How many miles could he run if he ran for 1 hour?
5 miles