Powers of 10
Multiplication
Division
Area/Perimeter
Volume
100
What do the 'powers' in powers of 10 mean? For example what does the 2 mean in 102
The exponent (power) in powers of 10 says how many times you multiply 10 by itself. 102= 10 x 10 = 100
The powers of 10 tell you how many zeros after the 1.
100
Name 3 tricks for single digit multiplication.
multiples of 2 are even
If the digits add up to a number divisible by 3 then the number is divisible by 3
If the number ends in a 5 or 0 it is divisible by 5
If the number is divisible by 2 and 3 it is divisible by 6
Finger 9 division rule
100
24 / 4
6
100
A rectangle has a length of 5 meters and a width of 3 meters. What is the perimeter of the rectangle?
16 meters
100
What is the formula for finding the volume of a rectangular prism?
LxWxH=V
Length x width x height = volume
200
What is 104
10,000 (ten thousand)
200
6 x 18
108
200
108 / 9
12
200
A rectangle has a length of 10 meters and a width of 2 meters. What is the area of the rectangle?
20 meters
200
What is the volume of this rectangular prism?
180 in3
300
What is 5x103
5 x 103 =5 x 1,000= 5,000
300
14 x 72
1,008
300
125/16 give the answer as a remainder
7 r.13
300
A rectangle has a perimeter of 24 centimeters and a width of 4 centimeters. What is the length of the rectangle?
8 meters
300
A rectangular prism has a length of 6 cm, a width of 5 cm, and a volume of 60 cubic cm. What is the height of the prism?
h=2
400
8.4 x 106
8.4 x 106 = 8.4 x 1,000,000 = 8,400,000
400
625 x 14
8,750
400
5,247 / 15 (give the answer with a remainder or decimal)
349 r.12
400
A rectangle has an area of 36 square feet and a width of 3 feet. What is the length of the rectangle?
12 feet
400
A rectangular prism has a width of 5 cm, a height of 4 cm, and a volume of 200 cubic cm. What is the length of the prism?
L=10
500
(4.4 x 102) + (3.1 x 104)
(4.4 x 102) + (3.1 x 104)
(4.4 x 100) + (3.1 x 10,000)
440 + 31,000 = 31,440
500
(54 x 18) + (396 x 14)
6,516
500
33 / 8 Give the answer as a decimal
4.125
500
A man is building 2 gardens. He wants to have a total area of 100 square feet. What are two possible sets of dimensions for his gardens?
Answers will vary
500
What is the volume of this composite figure?
112 cm3