smc-3144-10-Coins and change

Number, NAP-K3-NC01v1

Yanni buys 7 peaches for $1.30 each.

He pays for the peaches with a $10 note.

How much change should Yanni receive?

`$0.90`	`$1.10`	`$1.90`	`$8.10`

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`$0.90`

Show Worked Solution

`text(Change)`	`=10.00 – 7 xx 1.30`
	`=10-9.10`
	`=$0.90`

Number, NAP-J3-NC02

Patrick gets $7.35 in pocket money each week.

He does extra jobs one week and earns $4.75 more.

How much money did Patrick receive in total in the week?

`$11.00`	`$11.10`	`$12.00`	`$12.10`

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`$12.10`

Show Worked Solution

`$7.35 + 4.75 = $12.10`

Number, NAP-D3-CA05

Bronwyn receives $1.85 in change at the shop.

She receives only coins.

What is the least number of coins that she could receive?

`3`	`4`	`5`	`6`

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`5`

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`text($1.85 in the least number of coins is:)`

`1 xx $1, 1 xx 50text(c), 1 xx 20text(c)`

`1 xx 10text(c), 1 xx 5text(c).`

`:.\ text(Least coins) = 5`

Number, NAP-C3-CA06 SA

Geoffrey buys 4 peaches and 1 watermelon from a fresh fruit market.

How much does Geoffrey pay altogether?

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`$4.60`

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`text(Total payment)`	`= (4 xx 0.75) + 1.60`
	`= 3.00 + 1.60`
	`= $4.60`

Number, NAP-F3-NC21

Brandon has a money jar that contains 50 cent, 20 cent, 10 cent and 5 cent pieces only.

If he buys a pie worth $2.65, what is the minimum amount of coins he can pay with?

`5`	`7`	`8`	`9`	`11`

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`7`

Show Worked Solution

`text(Minimum number of coins would be:)`

`5 xx 50\ text(c)`

`1 xx 10\ text(c)`

`1 xx 5\ text(c)`

`:.\ text(A minimum of 7 coins is needed.)`

Number, NAP-F3-NC15

Andy buys a chocolate bar for 95 cents from the shop.

He has 4 coins in his hand and pays the exact amount.

Which coin is not in Andy's hand?

`text(5 cent)`	`text(10 cent)`	`text(20 cent)`	`text(50 cent)`

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`text(10 cent)`

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`text(4 coins can only make up 95 cents as follows:)`

`1 xx 50\ text(cent)`

`2 xx 20\ text(cent)`

`1 xx 5\ text(cent)`

`:.\ text(Andy doesn’t have a 10 cent.)`

Number, NAP-F3-NC04

Missy has $5.40 and bought a cup of coffee that cost her $4.85.

How much money does she have left?

`$0.55`	`$1.45`	`$1.55`	`$10.25`

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`$0.55`

Show Worked Solution

`$5.40 – $4.85 = $0.55`

Number, NAP-G3-CA14

Camilla has only 10-cent, 20-cent and 50-cent coins in her purse.

She buys a coffee that costs her $3.80 and pays the exact price.

What is the smallest number of coins she could use to pay for her coffee?

`7`	`8`	`9`	`10`	`11`

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`9\ text(coins)`

Show Worked Solution

`text(The minimum number of coins are:)`

`7 xx 50 text(-cent)`	`= $3.50`
`1 xx 20 text(-cent)`	`= $0.20`
`1 xx 10 text(-cent)`	`=$0.10`

`:.\ text(Minimum coins to make $3.80 = 9 coins)`

Number, NAP-H3-NC25 SA

David spent $82 at the post office.

He bought a souvenir set of stamps for $53.

With the remaining money he bought 10 stamps at $1.70 each and some stamps at 60 cents each.

How many 60-cent stamps did David buy?

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`20`

Show Worked Solution

`$82 – $53 = $29`

`$29 – (10 xx 1.70)`	`= 29 – 17.00`
	`= $12.00`

`:.\ text(Number of 60-cent stamps)`

`= 1200/60`

`= 20`