igsce maths multiply a negative and positive

1
multiply negative number by a positive number
using a number line
2
in this lesson
we show how to multiply a negative by a positive
number using a number line
you also do an exercise multiplying a negative
by a positive number using a number line
3
multiplication is a foursome process
direction of movement
direction we are facing
3.
1.
a x b
step size
number of steps
2.
4.
multiplication is a foursome
4
examples
- 6 x 3
-ve
ve
step size 3
move 6 steps
move forward
facing negative
- 18
- 6 x 3
answer from number line
5
examples
- 2 x 4
-ve
ve
step size 4
move 2 steps
move forward
facing negative
- 2 x 4
- 8
answer from number line
6
lets do together
7
examples
- 5 x 2
-ve
ve
step size 2
move 5 steps
move forward
facing negative
- 10
- 5 x 2
answer from number line
8
examples
- 4 x 3
-ve
ve
step size 3
move 4 steps
move forward
facing negative
- 12
- 4 x 3
answer from number line
9
in the next exercise
you need
a number line
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exercises
evaluate the following
1.
2.
3.
4.
5.
6.
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answers
we evaluated the following
1.
2.
3.
4.
5.
6.
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working
1.
-ve
ve
step size 5
move 3 steps
facing negative
move forward
- 15
- 3 x 5
answer from number line
13
working
2.
-ve
ve
step size 2
move 7 steps
move forward
facing negative
- 14
- 7 x 2
answer from number line
14
working
3.
-ve
ve
step size 6
move 3 steps
move forward
facing negative
- 18
- 3 x 6
answer from number line
15
working
4.
-ve
ve
step size 2
move 4 steps
move forward
facing negative
- 8
- 4 x 2
answer from number line
16
working
5.
-ve
ve
step size 10
move 2 steps
move forward
facing negative
- 2 x 10
- 20
answer from number line
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working
6.
-ve
ve
step size 2
move 11 steps
move forward
facing negative
- 11 x 2
- 22
answer from number line
18
summary
we showed how to multiply a negative by a
positive number using a number line
you also multiplied negative by a positive
number using a number line
how do we multiply using a number line?
a x b
multiplication is a foursome process
a
b
give us
give us
direction we are facing
direction of movement
number of steps
step size
19
summary
we showed how to multiply two positive numbers
using a number line
you also multiplied two positive numbers using a
number line
multiplication is a foursome process
direction we are facing
direction of movement
a x b
number of steps
step size
20
more free maths lessons
at
igscemaths24.thinkific.com
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working
in this lesson
in this lesson
22
summary
in this lesson
in this lesson
23
working
1.
5 x 4
move 5 steps
step size 4
forward
5 x 4
20
answer from number line
24
working
1.
7 x - 3
step size -3
move 7 steps
backward
7 x - 3
- 21
answer from number line
25
working
1.
- 5 x - 4
move 5 steps
step size -4
backward
- 5 x - 4
20
answer from number line