Explore the counting sequence for counting to 100 and beyond | Exit Quiz | Oak National Academy

Starting with the smallest, put these decades in order

• the twenties

• the fifties

• the nineties

Answer explanation

The twenties start with 2 tens, so they are first, followed by the fifties because they have 5 tens, then the nineties because they have 9 tens.

Tags

CCSS.2.OA.C.3

Which decade does the number 58 belong to?

• the fifties

• the eighties

Answer explanation

We know 58 starts with fifty, meaning it has 5 tens, so it belongs to the fifties.

Tags

CCSS.1.NBT.B.2B

CCSS.1.NBT.B.2C

Sort these numbers in the order you would say them when counting backwards. Use numbers to show the correct order.

• 96

• 99

• 98

• 97

Answer explanation

You may have noticed that the ones digits follow the same pattern as when counting backwards in ones, so 49, 8, 7, 6, so the order must be 99, 98, 97, 96

Tags

CCSS.1.NBT.A.1

Fill in the missing number. 83 is the same as 8 tens (a)  

Answer explanation

83 has 8 tens and 3 ones, so it is 8 tens 3

Tags

CCSS.1.NBT.B.2B

CCSS.1.NBT.B.2C

Andeep is counting forwards from 94. What is the next multiple of ten he will say?

(a)  

Answer explanation

We know ninety has 9 tens, so the next multiple of ten will have 10 tens, so 100

Tags

CCSS.1.NBT.A.1

When I count back from 70, each number will have (a)   tens.

Answer explanation

We know 70 is at the start of the seventies decade. When counting back from 70, each number will be in the sixties, so will have 6 tens.

Tags

CCSS.1.NBT.A.1