# Place Value Cards

Australian curriculum number (ACMNA026; ACMNA027; ACMNA028)

This sequence explores the multiplicative place-value properties of numbers. Students learn to represent numbers up to 1000 as multiples of 100s, 10s and 1s. For example, 664 = (6 x 100) + (6 x 10) + (4 x 1).

This sequence is for students who:

• have a sound understanding of the additive place value of numbers; that is, 64 is made up of 60 and 4.
• have experience skip counting off the decade by 10s and 100s.

### Lesson 1: Counting Cards

The teacher uses a set of cards with 1, 10 and 100 printed on them and asks students to skip count according to the number printed on the card. The cards are shuffled and again skip counted according to the number on the card. Students are asked to consider why they reach the same total when the cards are presented in a different order. They then explore the relationship between the cards and the place-value property of the final number in the count.

### Lesson 2: Counting With Plato

Students look at the fact that counting ten 1s is equal to 10, ten 10s is 100 and ten 100s is 1000. Plato the counting robot is introduced to the students. The students count with Plato and then, using the total of the count, reflect on how many 1s, 10s or 100s may have been shown in the counting sequence.

Last updated June 12 2020.