Addition
20 + 25.
What is 45?
20 - 7
What is 13?
Another way to call 100 in years.
What is a century?
If you have 1m, it equals 100 of these.
What are centimetres?
Round to the nearest ten: 13
What is 10?
13 + 12
What is 25?
75 - 24
What is 51?
There are only 8 in our Solar System but in the universe, there are more than a billion.
What are planets?
There are this many days in a year.
What is 365?
Round to the nearest 10: 25
What is 30?
134 + 43
What is 177?
110 - 9
What is 101?
There are over 100 of these in 2 minutes.
What are seconds?
1000 hours is approximately this many days.
What is 41?
Round to the nearest 10: 54
What is 50?
99 + 99
What is 198?
200 - 25
What is 175?
There are 180 of these each year
What are days of school?
800 + 199
What is 999?
Round to the nearest ten: 125
What is 130?
John has 17 candies and his friend Sarah gives him 17 more. John should have this many candies.
What is 34?
150 - 75
What is 75?
100 centimetres, is equal to this many metres.
What is 1m?
When there are less than 1000 of one kind of animal, they are close to this.
What is extinction?
Round to the nearest 10: 189
What is 90?