Serious Savings 5. This table shows the amount of money saved by some people in their bank accounts over a period of 2 years. Work out how much money each person has saved.
Account Holder Savings Year 1 €4097 €7832
Mr Eric Euro
Ms Penny Rich Mr Sid Cent
Ms Mary Moola Mr Des Dosh
Ms Delia Dollar Mr Peter Shilling Ms Elsie Tanner
€10284 €19116 €21396 €33698 €37711 €53069
Savings Year 2 €6395 €9518 €6992
€14577 €24625 €29448 €45339 €49413
Total Savings ? ? ? ? ? ? ? ?
6. The world-famous superhero Centipede Girl recently released her autobiography, One Leg Ahead of the Rest. In the fi rst week it sold 14736 copies. In the second week it sold 12965 copies. In the third week it sold 8827 copies. This resulted in the book becoming the number one bestseller in non-fi ction. How many copies were sold altogether?
Estimating and Calculating Differences
1. 8987 adults attended a concert. If 3409 were men, estimate how many women attended the concert.
a) Round up or down to the nearest thousand and make an estimate.
b) Round up or down to the near est hundred and make an estimate.
c) Round up or down to the nearest ten and make an estimate.
d) Which estimate will be the most accurate? Why?
2. Estimate the answers to these.
a) 7509 – 4390
b) 9788 – 2203
c) 11611 – 4390
d) 15908 – 12475
e) 16348 – 9452
f) 22167 – 18643
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