Addition and Subtraction

Complete this diagram so that the three numbers on each line add up to 100.

This table shows the number of students who took part in activities at an outdoor centre.

How many less students went walking than climbing?

Write in the missing number.

______ + 357 = 1000

Fatma listens to music on her music player.

The table shows the number of songs she has on her player.

How many songs does Fatma have on her player?

Wahid works out a calculation.

506 + 893 = 1599

Her answer is incorrect.

What should she have done to avoid this error?

240 people watch a circus. 179 of the people are adults.

How many more adults than children watch the circus?

Choose all the calculations that have an answer between 600 and 650

• 990 − 389

• 888 − 239

• 985 − 396

• 849 - 287

An hippo eats 158 kg of food on Monday and 163 kg of food on Tuesday.

There was 500 kg of hippo food on Monday morning.

How much food remains on Tuesday evening?

Aiko says, ‘When I add tens to a whole number only the tens column will change’.

Is Aiko correct?

Explain your answer.

Here are four statements about odd and even numbers.

One statement must be wrong.

Choose the wrong statement.

• The sum of three even numbers is 16  

• The sum of three odd numbers is 20

• The sum of two odd numbers is 10

• The sum of two even numbers is 18