Long Multiplication
Multiplying Decimals
(ignore the decimal and multiply like normal to begin!)
(ignore the decimal and multiply like normal to begin!)
Multiplying Fractions
(cross Simplify and then multiply across)
(cross Simplify and then multiply across)
Dividing Fractions (Keep/Change/Flip)
Put it into words
100
54 x 8
432
100
40 x 0.1
0.4
100
4/15
100
How would you write the keep/change/flip version of
1/2-:4/3
1/2xx3/4
100
You are doing long multiplication and you have already multiplied the one's place. You are moving on to multiply the ten's place. What must your first step be before you begin to multiply?
add a placeholder (a zero) in the one's place
200
836 x 4
3,344
200
957 x 0.2
191.4
200
4/5xx3/8
3/10
200
3/8-:2/5
15/16
200
When multiplying decimals, how can you figure out where the decimal goes in your final answer?
Find the total number of digits behind the decimals in the numbers that you are multiplying. Move the decimal that many times in the answer.
300
31 x 24
744
300
6.3 x 0.31
1.953
300
10/18xx18/15
2/3
300
5/6-:7/2
5/21
300
What specifically do you Keep, Change, and Flip when dividing fractions?
Keep... the first fraction
Change... the -: to xx
Flip... the second fraction
400
84 x 37
3,108
400
0.52 x 6.8
3.536
400
8/24xx12/7
4/7
400
1/5-:(3/10-:9/7)
3
400
Make a word problem for a 6th grader that's working on long multiplication!
...
500
207 x 324
67,068
500
1.75 x 32.5
56.875
500
1/5 xx3/4xx4/9
1/15
500
7/4-:9
7/36
500
Make a word problem for a 6th grader that's working on multiplying fractions!
...