smc-3020-30-Change

Number and Algebra, NAP-C1-10

Sandy has the exact coins below in her pocket.

She buys fruit for lunch that costs $1.75.

How much money does Sandy have left?

`$0.08`	`$1.00`	`$1.10`	`$1.20`

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`$1.20`

Show Worked Solution

`$1 xx 1 = $1`

`50¢ xx 3 = $1.50`

`20¢ xx 1 = 20¢`

`10¢ xx 2 = 20¢`

`5¢ xx 1 = 5¢`

`text(Total worth of coins)`

`= $1 + $1.50 + 20¢ + 20¢ + 5¢`

`= $2.95`

`:.\ text(Money left)`	`= $2.95 – $1.75`
	`= $1.20`

Number and Algebra, NAP-E1-24

Siri has this much money.

She buys a drink for $1.25.

How much money does Siri have left?

`text(75 cents)`	`text(85 cents)`	`text(90 cents)`	`text(95 cents)`

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`text(85 cents)`

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`text(Money Siri has at the start)`

`=$1+50¢+20¢+20¢+10¢+10¢`

`=$2.10`

`text(Money left after buying a drink)`

`=$2.10 – $1.25`

`=85\ text(cents)`

Number and Algebra, NAP-F1-33 SA

Clancy bought some pens using a $20 note.

Each pen cost 35 cents.

Clancy got $16.15 change.

How many pens did Clancy buy?

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`11`

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`text(C) text(ost of pens)`

`= $20 – $16.15`

`= $3.85`

STRATEGY: This division is made easy by first working out that 10 pens cost $3.50.

`text(Number of pens bought)`

`= 3.85 ÷ 35\ text(cents)`

`= 11`

Number and Algebra, NAP-H1-22

Joel has only these coins.

Joel buys a bottle of soda for $2.25 and a lollipop for 35 cents.

How much money does Joel have left?

`text(65 cents)`	`text(80 cents)`	`text(90 cents)`	`$2.70`	`$3.25`

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`text(65 cents)`

Show Worked Solution

`text(Total money before spending)`

`=50¢ + $2 +20¢ + 10¢+ 20¢ + 5¢ + 20¢`

`= $3.25`

`text(C)text(ost of soda and lollipop)`

`= $2.25 + 35¢`

`=$2.60`

`:.\ text(Money left)`	`=$3.25 – $2.60`
	`=65¢`