Place Value – Numbers to 100

To recognise the place value of each digit in a 2-digit number.

Abacus Workbook 2 | 100 bead string

Ask your student to show 45 on their 100 bead string. Ask them how they do this.

Ask, ‘To find 45, did you need to count in ones? Is there another way?’

Ask, ‘Read this number sentence with me: 45 equals 40 add 5.’

Say, ‘Now show on the 100 bead string how we split 45 into 40 and 5.’

Repeat this process with the number 52.

What number sentence can we write? What tens and ones can we split 52 into?

Tell your student that splitting up a number into tens and ones like this is called partitioning.

Write: 50 + 2 = 52 and read the sentence together.

Repeat for 88 and then with other 2-digit numbers.

Next, ask your student to show a number between 60 and 70.

Ask, ‘How many tens are you showing?’ Ask your student to write a number sentence to go with the number on their bead string.

Repeat with other numbers between different multiples of 10.

This video demonstrates using the bead string to help partition 2-digit numbers

Take two 📄 0-9 Number cards and place them next to each other to make a 2-digit number, for example, 68.

Ask your student to create this number using a 📄 100 bead string and to record the matching partitioning number sentence.

For example: 68 = 60 + 8

Repeat with other numbers.

Your student can play the Two-digit targets game.

You have a set of the digits from 0 - 9.

Can you arrange these digits in the five boxes below to make two-digit numbers as close to the targets as possible? You may use each digit once only.

The activity contains a problem where your student has to make a multiple of 5. You may wish to change this to a multiple of 10.

To help your student consolidate their learning from today, please ask them to complete the activities on page 2 of Abacus Workbook 2.

Citations