Decimals and Powers of 10
When multiplying decimals by powers of 10, the decimal moves to the ____________ because the value of the number becomes bigger when multiplied.
Right
There are 1,000 _________ in 1 meter.
millimeters
The mode of a data set is the number that occurs most often. Find the mode of the following set of numbers: 9, 3, 4, 3, 0, 2, 3, 6, 7
3
Round 56.7 to the nearest whole number.
57
True or false: When dividing decimals, the outside number does not have to become a whole number.
false
When dividing decimals by powers of 10, the decimal moves to the left because the value of the number becomes _______________ when divided.
smaller/less
There are 1,000 __________ in one kilogram.
grams
Jacob collects data on his Flappy Bird attempts. His highest score is 38 and his lowest score is 11. What is the difference between his highest and lowest scores?
27
Round 68.7 to the nearest 10.
70
Divide: 5.46 / 3
1.82
Solve the question: 3.65 x 104
36,500
Name the rule for the following number sentences:
2m = 200cm, 50m = 5,000cm, 0.45m = 45cm
(x 102) or (x 100)
The median is the middle number in a data set. Find the middle number in this list of data.
0, 7, 11, 15, 23
11
Make an estimate for 32.3 x 4.9, then solve the estimate.
(30 x 5 = 150) or (32 x 5 = 160)
Multiply: 0.37 x 0.5
0.185
Solve the question: 98 / 103
0.098
The rule for an input/output table is (divide 104) or (divide 10,000). If one of the input numbers is 380, what would its output number be?
0.0380
Find the average of this data set. Then write an explaination for how you found it.
9, 10, 2, 8, 1, 17, 13, 4
8
Make an estimate for 3.9 x 20.1, solve the estimate, then show where to put the decimal in the list of numbers: 7 8 3 9
4 x 20 = 80, and 78.39
Multiply: 4.8 x 6.2
29.76
If scientists have to send a spacecraft to the moon, the spacecraft would travel at least 2.4 x 105 miles. Write the number of miles in standard form.
240,000
Emma has a piece of string that is a total of 2.3m long. She finds another piece of string that is 30cm long. How long are both pieces of string combined? (Hint: start by converting one of your units!)
2.6m long OR 260cm long
A local vet takes data on the lengths of puppy dog's tails in inches. She records the lengths and wants to find the lengths of all the dog's tails combined. What is the total length of all the dog's tails?
7.5, 3, 5.25, 4.5, 9.25, 5.5
35 inches
Make an estimate for 443.2 x 9.9, solve the estimate, then place the decimal in the list of numbers:
4 3 8 7 6 8
440 x 10 = 4,400 and 4,387.68
Divide: 1.64 รท 0.04
41