Exercise 31 Page 23

Before we find the exact product, we will make an estimate. We will round 1 18 down to 1 and we will round 3 13 down to 3. The answer should be about 3. Now, let's find the exact product for the given multiplication. 1 18 * 3 13 We will start by rewriting the mixed numbers as fractions.

1 18 * 3 13

MixedToFrac

a bc=a* c+b/c

1* 8+1/8 * 3* 3+1/3

IdPropMult

Identity Property of Multiplication

8+1/8 * 3* 3+1/3

Multiply

Multiply

8+1/8 * 9+1/3

AddTerms

Add terms

9/8 * 10/3

Next, we multiply the numerators and the denominators.

9/8 * 10/3

MultFrac

Multiply fractions

9* 10/8* 3

Multiply

Multiply

90/24

ReduceFrac

a/b=.a /6./.b /6.

15/4

Finally, we write the fraction as a mixed number.

15/4

▼

Write fraction as a mixed number

WriteSum

Write as a sum

12+3/4

WriteSumFrac

Write as a sum of fractions

12/4+3/4

CalcQuot

Calculate quotient

3+3/4

AddTerms

Add terms

3 34