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Integers 1a
Extra questions for before the assessment
Try these questions.
(You’ll find the answers on the last two pages)
Key Skill 1: Write a number in words given the number in figures and vice-versa
Complete the following table.
Qu
numbers
a
6 512
b
13 900
c
206 415
d
310 094
e
2 450 307
words
f
Two thousand, four hundred and six
g
Forty-seven thousand, two hundred and six
h
Ninety thousand, three hundred and twenty
i
One hundred and seven thousand, four hundred and six
j
Fourteen million, twelve thousand, eight hundred and sixteen
Key Skill 2: Identify that numbers less than zero are negative
Circle the negative integers
2,
9,
-4,
-19,
17,
0
Key Skill 3: Appreciate that negative numbers are always smaller than positive numbers
Key Skill 4: Arrange a list of numbers, positive and negative, on a number line
Arrange each of these lists in order from lowest to highest:
Random order
23
-46
-77
38
-17
46
190
-200
34
76
-37
98
17
-53
-9
-20
-11
16
-47
-48
-19
46
-33
-50
-51
-42
-99
-33
-87
-26
-190
-200
List 1
Lowest to highest
Random order
List 2
Lowest to highest
Random order
List 3
Lowest to highest
Random order
List 4
Lowest to highest
Key Skill 5: Round to a suitable degree of accuracy
Round the numbers in the following tables:
unrounded number
54
75
98
2 392
24 367
354
475
1888
1981
24 367
2 454
3775
1888
2 592
24 367
rounded to nearest
ten
unrounded number
rounded to nearest
hundred
unrounded number
rounded to nearest
thousand
unrounded number
rounded to nearest
million
2 547 588
7 392 492
24 367 211
Key Skill 6: Use rounding to estimate answers
Round to the nearest thousand to give an estimate for the following calculations.
(We’ve done the first one for you)
(a)
3 475 + 8 945
≈
(b)
17 435 – 8 275
≈
(c)
123 456 + 24 500
≈
(d)
2 897 – 501
≈
(e)
167 400 + 2 743
≈
(f)
2 756 978 – 439 435
≈
3 000 + 9 000
=
12 000
Key Skill 7: Perform calculations involving negative numbers
Calculate the following:
(a)
5+8
(b)
5 + (-8)
(c)
(-24) + 7
(d)
(-14) + (-9)
(e)
5–8
(f)
5 – (-8)
(g)
(-24) – 7
(h)
(-14) – (-9)
Key Skill 8: Make correct use of the ‘less than’ and ‘greater than’ symbols
Tick the statements that are true.
(a)
7< 9
(b)
19 > 21
(c)
-3 > -1
(d)
-13 < 9
(e)
77 < -77
(f)
-23 < -21
(g)
5 < -5
(h)
777 > -776
Answers overleaf
Answers
Key Skill 1
Six thousand, five hundred and twelve
Thirteen thousand, nine hundred
Two hundred and six thousand, four hundred and fifteen
Three hundred and ten thousand and ninety – four
Two million, four hundred and fifty thousand, three hundred and seven
(a)
2 406
(b)
47 206
(c)
90 320
(d)
107 406
(e)
14 012 816
Key Skill 2
-4 and -19 are negative
Key Skill 3 and 4
List 1:
-200, -77,
-46,
-17,
23,
38,
46,
190
List 2:
-53, -37,
-20,
-9,
17,
34,
76,
98
List 3:
-50, -48,
-47,
-33,
-19,
-11,
16,
46
-200, -190, -99,
-87,
- 51, -42,
-33,
-26,
List 4:
Key Skill 5
Nearest ten:
50
80
100
2390
24 370
Nearest hundred:
400
500
1900
2000
24 400
Nearest thousand:
2000
4000
2000
3000
24 000
Nearest million:
3 000 000
Key Skill 6
(a) 3 000 + 9 000 = 12 000
(b) 17 000 – 8 000 = 9 000
(c) 123 000 + 25 000 = 148 000
(d) 3 000 – 1 000 = 2 000
(e) 167 000 + 3 000 = 170 000
(f) 2 757 000 – 439 000 = 2 318 000
7 000 000
24 000 000
Key Skill 7
(a)
13
(h)
-5
(b)
-3
Key Skill 8
(a), (d) and (f) are true
(c)
-17
(d)
-23
(e)
-3
(f)
13
(g)
-31