Free Mental Maths Olympiad Class 3 Study Material

Preparation Material of CREST Mental Maths Olympiad (CMMO) for Class 3

The Class 3 study material for the CREST Mental Maths Olympiad (CMMO) is listed below under the six official Class 3 syllabus units. Two things stand out this year: numbers grow to 1000, and Fractions becomes a unit of its own. Each link opens a free CREST topic page.

What's new in Class 3

The official syllabus keeps the five Class 2 units and adds a sixth, Fractions. Inside the units the range grows:

• Numbers move from below 100 to below 1000, with hundreds, tens and ones and expanded form.
• Tables extend from 2-10 to 2-20.
• Multiplication and Division adds factors and multiples, number bonds for multiplying and dividing, and words such as dozen, pair, score and century.
• Fractions covers one-third, two-thirds and similar parts, ordering and comparing fractions, and adding and subtracting like fractions.
• Geometry moves to acute, obtuse, right and straight angles.

A few Class 2 topics drop out of the list, among them addition and subtraction on a number line, repeated addition and horizontal, vertical and curved lines.

Class 3 paper at a glance

The paper gets longer: 80 questions in 60 minutes for 100 marks, made up of 60 Basique questions (1 mark each) and 20 Avance questions (2 marks each). That is about 45 seconds a question. Your child takes it alone, as in Class 2.

How to use this guide in Class 3

• Start with the Fractions group, since none of it appeared in Class 2.
• Learn the tables from 11 to 20 a few at a time; several Multiplication and Division topics depend on them.
• Practise three-digit numbers in the Number and Number Names group: reading, comparing and ordering them up to 1000.
• Check progress with the free Class 3 Mental Maths worksheets and the Class 3 CMMO sample paper.

Number and Number Names

1. Representation in expanded form (numbers less than 1000)
2. Number names (numbers less than 1000)
3. Representation in hundreds, tens and ones (numbers less than 1000)
4. Pictorial representation using cubes (numbers up to 1000)
5. Arranging the given numbers in ascending and descending order (numbers up to 1000)
6. Identify and usage of signs >, < and = (numbers up to 1000)
7. Abacus representation (numbers up to 1000)
8. Step counting of numbers starting from any number (numbers up to 1000)
9. Use of place value (numbers less than 1000)
10. Play with patterns
11. Games with numbers

Addition and Subtraction

1. Three digit subtraction (Problems on pictorial representation, missing numbers & borrowing on numbers less than 1000)
2. Three digit addition (Problems on pictorial representation, missing numbers, carry over & commutative property of addition on numbers less than 1000)
3. Solve problems on number bonds (numbers less than 1000)

Multiplication and Division

1. Use of multiplication tables to solve mathematical statements on multiplication (Tables from 2 to 20)
2. Understanding division using grouping and pictorial representation
3. Understanding of words doubles, half, thrice, three times, dozen, pair, score, century etc. to solve multiplication and division problems
4. Use of number bonds to solve problems of multiplication and division
5. Understanding and identifying factors and multiples of given numbers

Fractions

1. Understanding fractions using pictorial representations (one-third, two-thirds, one-eighth, two-fifth etc.)
2. Arrange given fractions in ascending or descending order
3. Identification and usage of signs >, < and = for given fractions
4. Like Fractions Addition with same denominator
5. Like Fractions Subtraction with same denominator

Measurement

1. Conversion of Unit of Measurement - (Length, Weight, Capacity, Time)
2. Money
3. Reading measurement in pictorial problems: Using a ruler, weighing balance, graduated container and clock

Geometry

1. Identification of acute, obtuse, right and straight angles
2. Identify and count the number of a particular 2-D shape in a figure (circle, triangle, rectangle and square, etc.)
3. Identify 3-D shapes (cuboid, cube, cone, sphere, cylinder, etc.)
4. Pattern recognition in a shapes series and identifying the next shape in the series