Multiplication
1/2 x 3/4 =
3/8
1/2 x 8 =
4
The product is smaller than 8 because we multiplied by a fraction less than 1.
1/2 x 4 =
4/2 = 2
1 1/2 x 2 =
6/2 = 3
Sarah ate 1/2 of a pizza. Her brother ate 1/3 of what she ate. How much of the pizza did her brother eat?
Her brother ate 1/6 of the pizza.
2/3 x 3/5 =
6/15 = 2/5
3/4 x 12 =
9
The product is smaller than 12.
2/3 x 3 =
6/3 = 2
2 1/3 x 2 =
21/3 = 7
Tom has a chocolate bar. He gives 2/5 of it to his friend. Then, his friend eats 3/4 of that piece. How much of the whole chocolate bar did his friend eat?
His friend ate 3/10 of the chocolate bar.
4/5 x 1/2 =
4/10 = 2/5
5/2 x 6 =
5
The product is greater than 6 because we multiplied by a fraction greater than 1.
3/5 x 5 =
15/5 = 3
3 1/4 x 2 =
26/4 = 6 2/4 = 6 1/2
A garden has 3/4 of a yard planted with flowers. Of that, 2/3 is roses. What fraction of the yard is planted with roses?
1/2 of the yard is planted with roses.
3/4 x 2/3 =
6/12 = 1/2
30/3 = 10
The product is greater than 6 because we multiplied by a fraction greater than 1.
4/7 x 7 =
28/7 = 4
1 1/2 x 2 1/3 =
21/6 = 3 1/2
Liam poured 5/6 of a jug of juice into a glass. He drank 1/2 of the glass. How much of the jug did he drink?
He drank 5/12 of the jug.
5/6 x 3/8 =
15/48 = 5/16
4/4 x 7 =
28/4 = 7
Multiplying by 4/4 (or any fraction equal to 1) keeps the product equal to the original number.
2/4 x 8 =
16/4 = 4
2 2/5 x 1 3/4 =
84/20 = 4 4/20 = 4 1/5
A ribbon is 7/8 meter long. Jenny uses 3/4 of it to wrap a present. How much ribbon did she use?
She used 21/32 meter of ribbon.