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WS03 - Representing and adding fractions

Mathematics, Year 5

By the end of Year 5, students use place value to write and order decimals including decimals greater than one. They express natural numbers as products of factors and identify multiples. Students order and represent, add and subtract fractions with the same or related denominators. They represent common percentages and connect them to their fraction and decimal equivalents. Students use their proficiency with multiplication facts and efficient calculation strategies to multiply large numbers by one- and two-digit numbers and divide by single-digit numbers. They check the reasonableness of their calculations using estimation. Students use mathematical modelling to solve financial and other practical problems, formulating and solving problems, choosing arithmetic operations and interpreting results in terms of the situation. They apply properties of numbers and operations to find unknown values in numerical equations involving multiplication and division. Students create and use algorithms to identify and explain patterns in the factors and multiples of numbers.

 

They choose and use appropriate metric units to measure the attributes of length, mass and capacity, and to solve problems involving perimeter and area. Students convert between 12- and 24-hour time. They estimate, construct and measure angles in degrees. Students use grid coordinates to locate and move positions. They connect objects to their two-dimensional nets. Students perform and describe the results of transformations and identify any symmetries.

 

They plan and conduct statistical investigations that collect nominal and ordinal categorical and discrete numerical data using digital tools. Students identify the mode and interpret the shape of distributions of data in context. They interpret and compare data represented in line graphs. Students conduct repeated chance experiments, list the possible outcomes, estimate likelihoods and make comparisons between those with and without equally likely outcomes.

Number

AC9M5N03

compare and order fractions with the same and related denominators including mixed numerals, applying knowledge of factors and multiples; represent these fractions on a number line

Number

AC9M5N05

solve problems involving addition and subtraction of fractions with the same or related denominators, using different strategies


Annotations

 

 

1. Recognises that 2 red shapes make a whole and expresses each red tile symbolically as one-half.

 

2. Adds fractions with the same denominator and expresses the total as a proper fraction.

 

3. Recognises that 3 blue shapes make a whole and expresses each blue tile symbolically as one-third.

 

4. Adds fractions and expresses the result as a multiple of a third.

 

5. Recognises that 6 green tiles make a whole and expresses each green tile symbolically as one-sixth.

 

6. Adds a whole number and a mixed numeral by partitioning the wholes, and expresses the result as a mixed numeral.

 

7. Expresses one fraction as an equivalent fraction to add fractions with the same denominator.

8. Expresses fractions with the same denominators and adds mixed numeral fractions, by partitioning and rearranging the wholes and part wholes.