Arithmetic Review

A03 Arithmetic Review Postmortem

Review explained

Multiple Choice

How do you find the multiples of a number?

• Use division to find out what you multiply to make a multiple.

• Use my multiplication facts and write them out.

• Write down how many times that number appears in a multiplication table/chart.

Multiple Choice

A prime number is:

• A number that is made only by multiplying 1 and itself.

• An odd number.

• A popular number.

• The least common multiple of two numbers.

Multiple Choice

Which number is NOT prime?

• 3
• 7
• 17
• 21

Write numbers in order

​Ascending = least to greatest

Descending = greatest to least.​

​

Process:

1. Write numbers in LIKE form

all decimals works well

2. Place the numbers in order​​

​Example: write in ascending order: 3/5, 62%, 0.59, 4/7

​1. Write numbers in LIKE form

0.6, 0.62, 0.59, 0.57​

2. Place the numbers in order​​​

4/7, 0.59, 3/5, 62%​

Reorder

Reorder the following 56%, 4/5, 1.07, 5/4 from least to greatest.

• 56%

• 4/5

• 1.07

• 5/4

1

2

3

4

• 1
• 2
• 3
• 4

Pay attention to units!!

​The most common mistake with the following is NOT including the unit.

​

Units include: $ or the word dollars

% or the word percent​

m or the word meters​

cm or the word centimeters​

and so on...​

​

Explanation Slide...

​

Multiple Choice

When Jude was born, she weighed 7.6 pounds. How much did she weigh in kilograms?

Use the following conversion: 1 kilogram is 2.2 pounds.

• 3.45 kg

• 9.8 kg

• 16.72 kg

• 29.6 kg

Poll

How do you feel about taking this test?