Tens and ones

For grown-ups: this lesson in words

Year 2 · Maths

Tens and ones: I can find the tens and ones in a number.

1. Here are 10 pencils. That is 1 ten.

   10 more pencils. Now there are 2 tens.

   3 more are 3 ones. That makes 23.

   Picture: 1 ten: 10 pencils, 1 ten: 10 pencils and 3 ones: 3 pencils. 23 pencils altogether.

2. A long rod is 1 ten. Here are 2 tens.

   A small cube is a one. Here are 3 ones.

   2 tens and 3 ones make 23.

   Picture: Base 10 blocks showing 23: 2 tens and 3 ones.

3. Your turn: How many tens are there?

   Picture: Base 10 blocks with 3 tens and 2 ones.

   Choose one:

   • 2
   • 3
   • 5

   Answer

   The answer: 3

   There are 3 long rods, so 3 tens.

   3 tens and 2 ones make 32.

   Picture: Base 10 blocks showing 32: 3 tens and 2 ones. It is split into 30 and 2.

Words to know

tens:

Groups of 10 things.

ones:

Single things that are not in a group of 10.

digit:

One of the numerals 0 to 9 that we write numbers with.

partition:

Split a number into parts, like tens and ones.