Chapter 2 Our Number System, Addition And Subtraction Examples And Worksheet Page 18
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3050
OUR NUMBER SYSTEM, ADDITION AND SUBTRACTION (CHAPTER 2)
13
First estimate the answer by rounding to the nearest thousand. Then do the addition.
For example, 1348 + 3682
Estimate: 1000 + 4000 = 5000
1348
+ 3682
5030
7805 + 1990
1346 + 2813
4021 + 2369
a
b
c
3008 + 4987
7809 + 8798
3679 + 5080
d
e
f
3669 + 2902 + 4067
5607 + 2450 + 3336
6142 + 2164 + 4378
g
h
i
1002 + 678 + 9205
6745 + 298 + 3006
256 + 3055 + 892
j
k
l
14
Find the missing digits of
1 3 8 4
2 6 ¤ 7
8 ¤ 5 3
a
b
c
+
2 ¤ 6 ¤
+ 3 ¤ 5 ¤
+ ¤ 4 2 ¤
¤ 1 ¤ 3
¤ 1 4 2
1 6 4 ¤ 5
PROBLEM SOLVING
On Sports Day Cathy ran in the 100 metres, 200
15
metres, 400 metres and 1500 metres events. How
far did she run altogether?
Kim had 146 cards showing photographs of rugby
16
players and Joshua had 273 cards. How many
cards did they have between them?
At Athelton School there are 362 students in the
17
Junior School, 239 students in the Middle School
and 691 students in the Upper School. How many
students attend Athelton School?
Jenny’s great grandfather was born in 1913. He died on his 89th birthday. In what year
18
did he die?
19
Find the total cost of the items that David bought for his flat: a refrigerator costing
$635, a washing machine costing $539 and a television set costing $1042:
20
An aeroplane made three flights in one day. The
distances travelled were 643 km, 1647 km and
2809 km. How far did the aeroplane fly?
21
The population of the town of Bestbeach (usually
3641 people) was increased by 1097 on the day
of the Surf Carnival. How many people were in
Bestbeach on that day?
22
Dirk was flying to Europe for a holiday. His air fare was $1239, his travel insurance
was $119 and he was going on a tour costing $752. He allowed $1500 for extras. What
was the cost of his holiday?
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