Whole Number Arithmetic
Topic 1
Round this number to 4 sig. fig.
675,448
675,400
Write down the value of the 6 in
47 863 274
60 000
Evaluate
(23 11) 6 6 2 
2
12  6  4
2
Evaluate
(23 11) 6 6 2 
2
12  6  4
2
12  6 16
32
Evaluate
3 3 
3
3  243
5
2
Evaluate
56 (5 3) 
56  8  7
Evaluate
8 8 1

6 3
Evaluate
8  8 1 64 1

63
9
Evaluate
8  8 1 64 1 63


7
63
9
9
Evaluate
6 3  19 8 
2

Evaluate
6  3  19  8
2
6  9  27 

Evaluate
6  3  19  8
2
6  9  27  2
Simplify by canceling factors
7
49  60 2

35  42
12
6
7
Simplify by canceling factors
8
3
72 21 1
2
63 48
6
9
Simplify by canceling factors
8
6
1
4
6888

56
7
123
Evaluate
5 
3
Evaluate
5  5 5 5
3
125
Evaluate
1 
7
Evaluate
1 
7
1
Evaluate
6
1
Evaluate
6
1
6
Evaluate
64 
0
1
Evaluate
36 
6
Evaluate
490 000  700
Evaluate
169 144 
Evaluate
169 144  25
=5
Evaluate
25  9  5- 3= 2
Evaluate
74 
2
74
Evaluate
3
125 
Evaluate
3
555 
5
Put brackets into this sentence to
make it true
12 24  6 3  2
Put brackets into this sentence to
make it true
12  24 6  3 2
Write these numbers as the
product of prime factors
48
12
4
2
2
3
4
2
2
Write these numbers as the
product of prime factors
48
12
4
2
2
3
4
2
48  2  3
4
2
Write these numbers as the
product of prime factors
350
35
10
2
5
5
7
Write these numbers as the
product of prime factors
350
35
10
2
5
5
350  2  5  7
2
7
Roster the elements of each set
{factors of 42}
1
2
3
6
7
14
21
42
Roster the elements of each set
{prime factors of 144}
Only give the prime numbers that divide into 144
144  12 12  4  3  4  3
Roster the elements of each set
{prime factors of 144}
Only give the prime numbers that divide into 144
144  12 12  4  3  4  3
 2 2 32 2 3
Prime factors are 2, 3
Roster the elements of each set
{multiples of 8}
8, 16, 24, 32…
You only need to give 4
Find the Highest Common
Factor
48 and 72 H. C. F
24
You need to find the biggest number that
divides into both numbers
Find the Lowest Common
Multiple
48 and 72 L. C. M
24  2
24  3
Start with H.C.F 24

You need to find the smallest number that
all numbers divide into
Find the Lowest Common
Multiple
48 and 72 L. C. M
24  2
24  3
L.C.M.  24  2  3  144

Find the Highest Common
Factor
16, 8 and 20 H. C. F
4
You need to find the biggest number that
divides into all numbers
Find the Lowest Common
Multiple
16, 8 and 20 L. C. M
Start with 20, 40, 60, 80
You need to find the smallest number that
all numbers divide into
complete the statements
6  {1, 3, 9, 12}

complete the statements
{16} 

{multiples of 8}
complete the statements
3


{multiples of 9}
complete the statements
41


{prime numbers}
complete the statements
{multiples of 4}


{even numbers}
Round off each number to 1 sig.
Fig
68  74  70  70
4 900
Round off each number to 1 sig.
Fig
9512  10000
100
Round off each number to 1 sig.
Fig
23  20  20  20  20
3
3
8000