Detailed Explanation of Place Value Models for Two-Digit Numbers 🔢

When we learn about place value models for two-digit numbers, we are finding out how to understand the number by looking at the tens and ones. In Year 2, it is important to know that every two-digit number has two parts: the tens and the ones.

What Are Tens and Ones? 🤔

  • Tens: This means how many groups of ten are in the number.
  • Ones: This means how many single ones are left after the tens.

For example, in the number 34, the 3 is in the tens place, so it means 3 groups of ten (which is 30). The 4 is in the ones place, so it means 4 single ones.

How to Represent Two-Digit Numbers with Place Value Models 🧱

We use models like ten rods and one blocks to show the number clearly.

  • A ten rod looks like a long stick that shows 10.
  • A one block is a small cube that shows 1.

If we want to show 24, we use:

  • 2 ten rods (which is 20)
  • 4 one blocks (which is 4)

So, 24 = 20 + 4.

Why Is Understanding Place Value Important in Maths? 🧮

Knowing the place value helps you:

  • Read numbers correctly.
  • Add and subtract numbers easily by knowing how tens and ones work.
  • Understand bigger numbers as you move on in maths.

Examples of Place Value in Two-Digit Numbers for Key Stage 1 🔍

  • Number 15: 1 ten rod + 5 one blocks = 10 + 5
  • Number 47: 4 ten rods + 7 one blocks = 40 + 7
  • Number 89: 8 ten rods + 9 one blocks = 80 + 9

Try drawing tens and ones or using small objects like pencils and erasers to make your own models. This will help you see the number in parts and understand how tens and ones work together.

Learning to use place value models for two-digit numbers is a great way to become confident in maths! 🎉

20 Examination-Style Questions with Answers on Place Value Models for Two-Digit Numbers ✏️

Question 1

Look at the place value model: 4 tens and 3 ones. What number is this?

Answer: 43

Explanation: There are 4 tens (which is 40) and 3 ones, so the number is 40 + 3 = 43.

Question 2

How many tens are in the number 57?

Answer: 5 tens

Explanation: The digit in the tens place is 5, so there are 5 tens.

Question 3

What number has 7 tens and 8 ones?

Answer: 78

Explanation: 7 tens means 70 and 8 ones means 8, so 70 + 8 = 78.

Question 4

Draw a place value model for the number 62.

Answer: 6 tens and 2 ones shown as blocks or dots representing 60 + 2.

Explanation: 62 has 6 tens and