ED2652 Lecture Notes - Lecture 2: Decimal Mark
Tutorial 2 – Maths 2
Decimal Fractions
Lesson Closure
- Whats the take hoe essage
Questions from Reading:
1. Why is an understanding of place value so important to a deep
understanding of decimal fractions
- The relationship between each place
o One of these is 10 of those
o Relationship is x10
▪ The relationship between the places is the base 10
system
▪ Move left x10, move right divide by 10
2. What are the pros and cons of using money to introduce decimal
fractions
- Cons
o The reading of the numbers is different (Terminology)
o Money only goes to 2 decimal points
o E.g. e dot hae $7.13
- Pros
o Its real orld otet eaig kids ould e ore egaged
▪ Kids are familiar with money
Misconceptiosn of Decimal Fractions
- A decimal point is like punctuation or a decoration
- A decimal point separates two whole numbers (using money or
measurement as a context can promote this)
- In decimals numbers on the right are different in some way
o Some misconceptions which may arise before understanding
develops
o Longer is larger
o Shorter is larger
o The place value columns reverse after the decimal point –
a use oeths
o Decimal point separates the whole numbers from negative
numbers
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