Maths Frameworking Pupil Book 1.2

Page 21

5

Choose a number from each list and subtract one from the other. Repeat for at least four pairs of numbers. What are the biggest and smallest answers you can find? A B

6

Copy each statement and work out the missing numbers. a

7

9

7+

=6

b 10 -

= 12

+ (-5) = 7

c

d (-8) -

=4

Copy each calculation and then fill in the missing numbers. a

8

8 -7 -5 3 -3 9 -8 -5 -1 4

3 + +1 = 4

b

-2 - +1 = -3

c

4 - +2 = 2

3+0=3

-2 - 0 = -2

3 - +1 = 2

3 + -1 = 2

-2 - -1 = -1

2-0=2

3 + -2 =

-2 - -2 =

1 - -1 =

3+

=

-2 -

=

0-

3+

=

-2 -

=

= -

=

Work out the answers. a

+3 - +2

b -4 - -3

f

-9 - -5

g

-6 + +6

h +6 - -7

i

k

+5 - +7

l

7 - -5

m -2 - -3 + -4

n - +1 + +1 - +2

c

+7 - -6

d -7 + -3

e

+7 - +3

-6 + -6

j

-1 + -8

These temperatures were recorded at Aberdeen Airport in January. Copy and complete the table. Draw a number line to check your answers. Sun

Mon

Tue

Maximum temperature (°C)

4

0

-1

Minimum temperature (°C)

-4

-6

Temperature (°C)

Difference (degrees)

10

Wed -7

8

8

10

Thu

Fri

Sat

2

3

5

-4

-2 6

A fish is 10 m below the surface of the water. A fish eagle is 15 m above the water. How many metres must the bird descend to catch the fish?

Challenge: Marking a maths test A A maths test consists of 20 questions. A correct answer earns 3 points, a wrong answer or missed question gets –2 points. Work out each pupil’s scores. a Aisha gets 12 right and 8 wrong. c Charles gets 8 right and 12 wrong. e What times table are all your answers in?

A computer spreadsheet is useful for this activity.

b Bill gets 10 right and 10 wrong. d Dilash gets 9 right and 11 wrong.

B What happens when a correct answer earns 4 points and a wrong answer gets –2?

1.4 Subtracting negative numbers

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11/11/13 8:22 PM


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Maths Frameworking Pupil Book 1.2 by Collins - Issuu