AC9M2N05 Year 2 Mathematics

Content descriptor multiply and divide by one-digit numbers using repeated addition, equal grouping, arrays, and partitioning to support a variety of calculation strategies

Elaborations

• • Elaboration making and naming arrays and using bar models to solve simple multiplication or sharing problems; for example, make different arrays to represent 12 and name them as “3 fours”, “2 sixes”, “4 threes”, “6 twos”; using physical or virtual materials to make arrays or using bar models to demonstrate that “3 fours” is equal to “4 threes”
• • Elaboration finding the total number represented in an array by partitioning the array using subitising and number facts; for example, describing how they determined the total number of dots arranged in a “3 fives” array by saying “I saw 2 fives which is 10 and then 5 more which makes 15”
• • Elaboration recognising problems that can be solved using division and identifying the difference between dividing a set of objects into 3 equal groups and dividing the same set of objects into groups of 3
• • Elaboration using a Think Board to solve partition and quotition division problems; for example, sharing a prize of \$36 between 4 people, using materials, a diagram and skip counting to find the answer; explaining whether the answer 9 refers to people or dollars
• • Elaboration using materials or diagrams, and skip counting to solve repeated equal quantity multiplication problems; for example, “Four trays of biscuits with 6 on each tray, how many biscuits are there?”; writing a repeated addition number sentence and using skip counting to solve