3rd Grade Saxon Math
Math Lesson 120 (Monday)
Part 1: Multiplying by 8
Go through fact master sheet 120; fill in the following answers with your child
0x8 = 0, 1x8 =8, 2x8 = 16, 3x8 = 24, 4x8 = 32, 5x8 = 40, 6x8 = 48, 7x8 = 56, 8x8 = 64, 9x8 = 72, 10 x8 = 80, 11x8 = 88
Assignment Part 1: 120 Facts
Have your child start with the timed multiplication facts, then have them fill in the blanks with x8s. How that works is 8 in the box 2 = 16. NOT 16 x8
Part 2: Identifying the factors of a number
Identifying prime numbers less than 20
Objectives: Students will learn how to identify the factors of a number
Students will learn how to identify prime numbers less than 20
1.) Show your child the problem 5x6 = 30. Tell them 5 and 6 because they multiply together are called FACTORS. The 30 is the answer of a multiplication problem and is called a PRODUCT.
FxF= P
3x2=6
FxF=P
4x5=20
FxF=P
6x9=54
FxF= P
1x11 = 11
Then do 1x18; have your child identify 1 and 18 as factors. Have them solve the problem; 18 and call it a product. Repeat with 2x9 and 3x6
2.) Look at Master 120 Chart that I sent home for Prime numbers; Have your child fill in the chart as I have filled in below.
1 2 3 4 5 6 7 8 9 10
1x1 
1x2 
1x3 
1x4 
1x5 
1x6 
1x7 
1x8 
1x9 
1x10 



2x2 

2x3 

2x4 
3x3 
2x5 




















1 
2 
2 
3 
2 
4 
2 
4 
3 
4 
Fill in the chart below that this way.
11 12 13 14 15 16 17 18 19 20
1x11 
1x12 
1x13 
1x14 
1x15 
1x16 
1x17 
1x18 
1x19 
1x20 

4x3 

2x7 
5x3 
8x2 

9x2 

2x10 

2x6 



4x4 

6x3 

5x4 










2 
6 
2 
4 
4 
5 
2 
6 
2 
6 
Any number as we talked about before used to multiply is a factor. A number used to create a larger number by multiplying is only counted as one factor. For example when you filled in 1x1, you still are only using the number one. That is why at the bottom of the chart there is just a 1 listed in the factors row.
If you look at 1x2, you have 1, 2, so you end up with 2 total factors. Same applies for the rest of the chart.
If you have more questions about this please let me know.
So going from the factor chart to what makes numbers PRIME. Prime numbers are when you have exactly 2 factors to make a product.
So the prime numbers from the charts are; 2, 3, 5, 7, 11, 13, 17, and 19
Answers to 120 A.
Inside the workspace box; Write each month; April, May, June, July, August
Write April = 25 days (including today)
Then write May = 31
Then write June = 30
Then write July = 31
Then write August = 31
Then write Sept = 3
Next in the box students have to add up those days. Total: 151 days
Answer line ____151 days ____
Explanation below:
Try to have your child split up the steps on different lines;
(Lines 1 &2) First I found out how many days are left in April and how many days are in May, June, July, and August,with the 3 days in September.
(Lines 3 &4) Then I added up those number of days, 25 + 31+30+31+31+3.
(Lines 5 & 6) Last I found that the total number of days to Lynn's birthday was 151 days.


