MULTIPLYING AND DIVIDING SIGNIFICANT FIGURES WORD PROBLEMS WORKSHEET

Estimate the cost of :

Problem 1 :

59 pens at $4 each

Solution

Problem 2 :

77 books at $8 each

Solution

Problem 3 :

208 staplers at 87 each

Solution

Problem 4 :

4079 rolls of tape at $9 each

Solution

Estimate the cost of :

Problem 5 :

48 books at $19 each

Solution

Problem 6 :

82 calculators at ϵ28 each

Solution

Problem 7 :

69 concert tickets at £48 each

Solution

Problem 8 :

89 CD players at $59 each

Solution

Problem 9 :

a. Estimate how much each person would get if a ϵ489,555 lottery prize is equally divided amongst 18 friends.

b. Estimate how long it would take Andreas to type a 7328 word article for a magazine if he type at 68 words per minute.

Solution

In each of the following, use one figure approximation to estimate the answer.

Problem 10 :

Helga can type at a rate of 58 words per minute. Estimate the number of words she can type in 38 minutes.

Solution

Problem 11 :

An apple orchard contains 72 rows of apple trees with 38 trees per row.

i. Estimate the number of apple trees in the orchard.

ii. Suppose each tree has yields on average of 278 apples. Estimate the total number of apples picked from the orchard.

Solution

Problem 12 :

A wine vat holds 29,675 litres of wine. The wine is siphoned into barrels for ageing, if each barrel holds 1068 litres of wine, how many barrels are needed ?

Solution

Problem 13 :

Michael wants to tow his boat on a trailer between two cities which are 468 km apart. It is a big boat so his car can only average 52 km per hour while towing. How long will the journey take Michael ?

Solution

Problem 14 :

A concert hall has 87 rows of seats, each with 58 seats. The cost per seat is $32.

i. Estimate the total number of seats

ii. Estimate the total income if all seats are sold.

Solution