Representing Fraction Multiplication
Draw 2 x 1/2
see drawing = 1
Show 4 x 1/2 as repeated addition
1/2 + 1/2 + 1/2 +1/2 = 2
Draw 3 x 1/4
see image 3/4
1/3 x 5
1 2/3
What are 2 key words to know you are multiplying numbers in a word problem?
Of, product, times, multiply, etc
Draw 3 x 1/4
3/4
Show 4 x 1/8 as repeated addition
1/8 + 1/8 + 1/8 + 1/8 = 1/2
Draw 5 x 1/4
see image 1 1/4
2/5 x 3
1 1/5
What is 2/5 of 7/12?
7/30
Draw 4 x 1/5
4/5
Show 4 x 1/3 as repeated addition
1/3 + 1/3 + 1/3 + 1/3 = 1 1/3
3 1/3 x 2 1/2
8 1/3
9/10 x 10
9
A recipe called for 2/3 cup flour. I triple the amount when I am baking. How much flour do I use?
2 cups
Draw 2/3 x 1/2
1/3
Show 10 x 1/10 as repeated addition
= 1
4 1/3 x 1 1/3
5 7/9
5/6 x 2
1 2/3
A recipe called for 2/3 cup flour. I only use a fourth of that amount. How much do I use?
1/6 cups
Draw 2/5 x 1/2
1/5
Show 3 x 1/2 as repeated addition
1 1/2
6 1/2 x 2 1/2
16 1/4
7/10 x 4
2 4/5
A recipe called for 2/3 cup flour. Miss B uses double the amount, and Mr P uses 4/2 of the amount. How much do they use? Who uses more?
They use the same amount! 1 1/3 cups