•   Number
•   Objective: Exploring computation and estimation
•   Level 3

The keywords for each question in this search are:

Question 1: Rounding
Question 2: Estimation; money
Question 3: Subtraction; decimals
Question 4: Addition; decimals
Question 5: Multiplication
Question 6: Rates; time
Question 7: Fractions
Question 8: Subtraction
Question 9: Subtraction; decimals
Question 10: Subtraction
Question 11: Addition
Question 12: Rates
Question 13: Fractions
Question 14: Fractions
Question 15: Subtraction; decimals
Question 16: Subtraction
Question 17: Addition; division; fractions; whole numbers
Question 18: Addition; multiplication; division; money

A newspaper reported that about 18 200 trees had been planted in the park. The number was rounded to the nearest hundred. Which of these could have been the actual number of trees planted?

(A)   18 043
(B)   18 189
(C)   18 289
(D)   18 328

Fereti had $5 to buy milk, bread, and eggs. When he got to the shop he found that the prices were those shown below:

At which of these times would it make sense to use estimates rather than exact numbers?

(A)   When Fereti tried to decide whether $5 was enough money.
(B)   When the checkout operator entered each amount into the cash register.
(C)   When Fereti was told how much he owed.
(D)   When the checkout operator counted Fereti's change.

A chemist mixes 3.75 millilitres of solution A with 5.625 millilitres of solution B to form a new solution. How many millilitres does this new solution contain?

Answer: __________

A teacher marks 10 of her pupils' tests every half hour. It takes her one and a half hours to mark all her pupils' tests. How many pupils are in her class?

Answer: __________

Write a fraction that is larger than .

Answer: __________

Subtract:

(A)   4369
(B)   3742
(C)   3631
(D)   3531

Julie put a box on a shelf that is 96.4 centimetres long. The box is 33.2 centimetres long. What is the longest box she could put on the rest of the shelf? Show all your working.

Answer: __________

When you subtract one of the numbers below from 900, the answer is greater than 300. Which number is it?

(A)   823
(B)   712
(C)   667
(D)   579

Add:

(A)   11 162
(B)   12 162
(C)   12 262
(D)   1 211 162

Marcus uses 5 tomatoes to make half a litre of tomato sauce. How much sauce can he make from 15 tomatoes?

(A)   One and a half litres
(B)   Two litres
(C)   Two and a half litres
(D)   Three litres

There are 54 marbles, and they are put into 6 bags, so that the same number of marbles is in each bag. How many marbles would 2 bags contain?

(A)   108 marbles
(B)   18 marbles
(C)   15 marbles
(D)   12 marbles
(E)   9 marbles

Louis exercises by running 5 km each day. The course he runs is km long. How many times through the course does he run each day? _____________

Subtract 4.722 - 1.935 =

(A)   2.787
(B)   2.797
(C)   2.887
(D)   2.897

Subtract

(A)   2035
(B)   2925
(C)   3005
(D)   3925

A book publisher sent 140 copies of a certain book to a bookstore. The publisher packed the books in two types of boxes. One type of box held 8 copies of the book, and the other type of box held 12 copies of the book. The boxes were all full, and there were equal numbers of both types of boxes.

John sold 60 magazines and Mark sold 80 magazines. The magazines were all sold for the same price. The total amount of money received for the magazines was $700. How much money did Mark receive?

Answer: __________