NA2-1: Use simple additive strategies with whole numbers and fractions.
This means students will learn to treat whole numbers as units of ones that can be split and recombined to make calculations easier. Additive strategies are about a type of thinking not the operation of addition. So additive strategies can be applied to addition (for example, 47 + 38 is 50 + 40 – 5), subtraction (for example, 74 – 8 = as 74 – 4 – 4 = ), multiplication (for example, 4 x 4 = as 4 + 4 + 4 + 4 = , which is 8 + 8 = ), division (for example, 18 ÷ 3 = , as 5 + 5 + 5 = 15 so 6 + 6 + 6 = 18). Additive strategies may also be applied to finding fractions of sets particularly halves, thirds, quarters, fifths, eighths and tenths. Level Two corresponds to students being proficient at the Early Additive stage of the number framework.
explore compatible numbers to 100
This is a level 2 number activity from the Figure It Out series.
The purpose of this activity is to support students deriving from simple multiplication facts that come from the simplest skip counting patterns: twos, fives, and tens.
use additive strategies to calculate costs
calculate costs by month and year/s
use addition to find the answer to subtraction problems
predict result of paper folding (Problem 1)
solve problems using additive strategies (Problems 2, 3, 4)
use doubles as a multiplication strategy
use mental strategies to solve subtraction problems
solve problems involving fractions
- Use multiplication by two, five and ten to solve problems with equal sets.
- Use multiplication two, five and ten to solve division problems with equal sets.
- Pose multiplication and division problems.
- Record working with multiplication and division using diagrams and equations.
The purpose of this activity is to support students in applying their knowledge of doubles, or “times two” basic multiplication facts, to solve division problems. The problems involve equally sharing a set between two parties. This involves recognising the amount being shared (the dividend) and the...
The purpose of this activity is to support students applying their knowledge of addition facts and basic multiplication facts to solve division problems. The problems involve equally sharing a set (the dividend) between more than two parties (the divisor). Problems are restricted to those with...
The purpose of this activity is to support students using their known multiplication facts to solve equal sharing problems.
find fractions of a strip
know words and symbols for fractions
use mental strategies (through tens) to solve addition and subtraction problems
use repeated addition to solve multiplication problems
use additive strategies to add numbers
compare food prices
use the five based strategy for addition
understand 1/2, 1/4, 1/3, 1/5 fractions
find fractions of a set
The purpose of this activity is to support students in equally partitioning a whole length into a given number of parts. Students learn to meet the three criteria for partitioning a whole: parts are equal in size the correct number of parts are formed the one whole (the strip) is completely used...