NA4-3: Find fractions, decimals, and percentages of amounts expressed as whole numbers, simple fractions, and decimals.
This means students will understand that finding a decimal or percentage of an amount involves finding a fraction of that amount, for example 40% of 56 = 0.4 x 56 = 4 x 5.6 = 22.4. They should be able to solve problems of the form a/b x c = d (a,b,c and d are whole numbers), where any one of the numbers is not known, for example 4/7 x = 24 (Four-sevenths of what number is twenty-four?) or % of 76 = 19 (What percentage of seventy-six is nineteen?). Students should be able to multiply fractions with understanding, for example 2/3 x 3/5 = as two-thirds of four-fifths, and use their multiplicative understanding of place value to solve multiplication and division problems with simple decimals, for example 1.6 x 0.4 = as 16 x 4 ÷ 100 = 0.64 and 24 ÷ 0.3 = as 24 ÷ 3 x 10 = 80.
find a percentage of a whole number (calculate interest rates)
Students will:
- perform calculations with percentages involving time and volume.
Students should discover that:
- one ratio (for example, burn times) may be used to discover another (for example, relative amounts of gases in air).
find percentage of whole numbers
- Apply number knowledge and strategies to bank statements and budget problems.
- Consider and apply protocols around the manageability of data collection and data safety.
- Use research information to inform an investigation.
- Determine appropriate variables and data collection methods.
- Design a survey format300
use multiplicative strategies to solve money problems
use addition and subtraction to solve money problems
identify which graph best represents the data
use multiplicative strategies to calculate costs
find percentages
find 10% and 20% of money amounts
use addition and subtraction to solve money problems
Apply knowledge of rates and ratios, and reasoning with linear proportions, to solve problems involving time.
Find and describe a rate of change for given data from a linear trend.
Find and describe a linear trend.
find percentages of a whole number
use rates to calculate exhange rates
find a percentage of a number
use multiplicative strategies to solve money problems
fidn a fraction of a whole number
explore relative values
analyse survey questions
interpret information from graphs
find percentages of numbers
use addition and subtraction to solve money problems
use mental strategies to solve multiplication problems involving money
find a percentage of a money amount
find 1/3 of a money amount
use addition and subtraction to solve money problems
use multiplication to solve money problems
round numbers
estimate a percentage
match a percentage to a shaded region of a whole
convert fractions to percentages
find mean of a set of numbers