Question

Question 1:

Without multiplying, which of the following has the greatest product?
a. 3/10 × 20
b. 13/10 × 20
c. 10/10 × 20


Justify your answer.
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Answer 1

b. 13/10 is larger than 10/10, which is 1, and 3/10. Therefore, if multiplied the same number to each of these three, as 13/10 is already the largest number, it will remain as the greatest product even after multiplication.

Answer 2

b. 13/10 x 20

Explanation:

Looking at the fractions, you can see that b is the greatest out of the three, reducing to about 1.3.

Since all of the answers are being multiplied by the same number (20), the greatest fraction would produce the greatest product.