Decimals, conversions and recurring decimals
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The teaching part (1 min) is free to watch. A free account opens the whole lecture: 7 practice questions, 2 real past-paper questions with the answers explained, the mistakes that lose marks, the full-marks tip, a one-card summary and a quick quiz.
What this lecture covers
- One number, three costumes
- Fraction to decimal
Read the transcript of the teaching part
Last time
Before we start: last time, in Three-set Venn diagrams and shading regions, you learned these points. Here they are again on one card. Keep them in mind, because today builds on them.
One number, three costumes
A half, zero point five, and fifty percent are the same number in three costumes. Cambridge expects you to change between them quickly and exactly. And then there is the strange case: a third is zero point three three three, and it never stops.
Fraction to decimal
A fraction is a division. To change it to a decimal, divide the numerator by the denominator. Seven eighths is seven divided by eight. That is zero point eight seven five. This decimal stops, so it is called a terminating decimal.
How often it comes up
How often Cambridge has asked each part, counted by ExamYard from every past paper in its question bank: Recurring decimals.
The whole chapter: Fractions, Decimals and Percentages.
Chapter 3: Fractions, decimals and percentages
- Fractions and mixed numbers 6 min
- Decimals, conversions and recurring decimals 6 min
- Percentages of quantities 6 min
- Percentage change, reverse percentages and profit 6 min
Also for IGCSE Maths 0580
Which topics come up most in IGCSE Maths 0580 past papers, counted from every paper since 2004.