Exercise 1.5 Primes, Powers And Square Roots Worksheet - Heinemann Maths Zone Page 11
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1
2
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4
5
6
7
8
9
10
11×
4
2
3
22 Put these numbers in ascending order: 2
,
121,
10
, 3
,
4
81
1.5
23 Write each number as a product of its prime factors, in index form.
1.5
(a) 81
(b) 128
(c) 144
(d) 8000
24 Simplify these with your calculator, using the shortest method possible.
1.5
5
6
3
3
(a) 6
(b) 13
(c) 15
(d) 25
3
7
6
5
(e) 32
(f) 2
(g) 3
(h) 4
− 4096
− 4481
− 5625
× 53
3
4
4
3
(i) 16
(j) 21
(k) 15
(l) 36
× 14
× 21
+ 2
+ 12
4
5
12
18
10
4
(m) 14
(n) 19
(o) 2
(p) 3
e
1 Set out these calculations in your normal way and work out the answers.
Worksheet R1.7
(a) 138 − 97
(b) 1902 − 845
(c) 5485 − 1099
e
2 List the numbers if you count by nines, starting at 30 and ending at 75.
Worksheet R1.8
3 Copy and complete the following by writing < or > between the numbers.
e
Worksheet R1.9
(a) 1001
982
(b) 3.9
3.38
(c) 0.03
0.19
e
4 Copy and complete each of the following by finding the pattern.
Worksheet R1.10
(a) 9, 15, 22, 30,
,
,
(b) 1, 3, 7, 15,
,
,
e
5 Calculate:
Worksheet R1.11
(a) 8000 ÷ 2000
(b) 1200 ÷ 4
(c) 45 000 ÷ 90
e
6 Find the missing number that makes each of the following true.
Worksheet R1.12
+ 7 = 24
(b) 4 ×
= 15 − 3
(c) 7 × 0 = 15 −
(a)
e
7 Perform the following divisions.
Worksheet R1.13
(a) 768 ÷ 3
(b) 1404 ÷ 9
(c) 7865 ÷ 5
e
8 List all numbers that 8 goes into that are greater than 70 and less than 150.
Worksheet R1.14
e
9 Simplify:
Worksheet R1.15
(a) 2 + 5 × 9
(b) 18 ÷ 6 − 3
(c) 8 × (15 − 5)
e
10 Which whole number is each of the following decimals closest to?
Worksheet R1.16
(a) 1.9
(b) 5.089
(c) 37.6001
e
Worksheet R1.17
11 Calculate:
−
+
(c) 1 − 1
7
2
3
1
5
(a)
(b)
-- -
-- -
-- -
-- -
-- -
e
9
9
4
4
6
Worksheet R1.18
12 If Celen purchases three tops at $15.50 each, how much change will she
e
Worksheet C1.11
receive from a $50 note?
e
Worksheet C1.12
e
Assignment 1
●
27
1
w h o l e
N U M B E R S
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