1. Adding and Subtracting from a Number (1)
x + (± a ± b)

2. 3 fewer –5 + 2 = –3 Fewer A woman has many Ferraris.
She sells 5 and buys 2.
Does she now have more Ferraris or fewer Ferraris?
Fewer
How many fewer?
3 fewer
–5 + 2 = –3

3. 4 fewer –7 + 3 = –4 Fewer A man has many Ferraris.
He sells 7 and buys 3.
Does he now have more Ferraris or fewer Ferraris?
Fewer
4 fewer
How many fewer?
–7 + 3 = –4

4. 3 fewer –5 + 2 = –3 40 Fewer A woman has many Ferraris.
She sells 5 and buys 2.
Does she now have more Ferraris or fewer Ferraris?
Fewer
How many fewer?
3 fewer
–5 + 2 = –3
If she originally had 10 Ferraris, then she now has 7.
If she originally had 23 Ferraris, then she now has 20. 40
If she originally had 43 Ferraris, how many does she have now?

5. 4 fewer –7 + 3 = –4 20 Fewer A man has many Ferraris.
He sells 7 and buys 3.
Does he now have more Ferraris or fewer Ferraris?
Fewer
4 fewer
How many fewer?
–7 + 3 = –4
If he originally had 10 Ferraris, then he now has 6.
If he originally had 44 Ferraris, then he now has 40. 20
If he originally had 24 Ferraris, how many does he have now?

6. Higher 300 m An airplane is flying at some height. It rises by 700 m.
How many m?
An airplane is flying at some height.
It rises by 700 m.
Then it comes down by 400 m.
Higher
Is it higher than before or lower than before?
300 m
Higher by how many m?

7. Higher 400 m An airplane is flying at some height. It rises by 900 m.
How many m?
An airplane is flying at some height.
It rises by 900 m.
Then it comes down by 500 m.
Higher
Is it higher than it was in the beginning or lower?
400 m
Higher by how many m?

8. Higher 300 m 3300 m An airplane is flying at some height.
How many m?
An airplane is flying at some height.
It rises by 700 m.
Then it comes down by 400 m.
Is it higher than before or lower than before?
Higher
300 m
Higher by how many m?
If the airplane was flying at a height of 2000 m before, then it is now flying at a height of 2300 m.
If the airplane was flying at a height of 1700 m before, then it is now flying at a height of 2000 m.
If the airplane was flying at a height of 3000 m before, then at what height is it flying now?
3300 m

9. 500 m
900 m
How many m?
An airplane is flying at some height.
It rises by 900 m.
Then it comes down by 500 m.
Higher
400 m
Is it higher than before or lower?
Higher by how many m?
If the airplane was flying at a height of 2000 m before, then it is now flying at a height of 2400 m.
If the airplane was flying at a height of 1600 m before, then it is now flying at a height of 2000 m.
If the airplane was flying at a height of x meters before, then it is now flying at a height of x meters.
If the airplane was flying at a height of a meters before, then at what height is it flying now?
a meters

10. 400 m
700 m
How many m?
An airplane is flying at some height.
It rises by 700 m.
Then it comes down by 400 m.
Higher
300 m
Is it higher than before or lower?
Higher by how many m?
If the airplane was flying at a height of 3000 m before, then it is now flying at a height of 3300 m.
If the airplane was flying at a height of 1700 m before, then it is now flying at a height of 2000 m.
If the airplane was flying at a height of a meters before, then at what height is it flying now?
a meters

11. 3 fewer –5 + 2 = –3 y – 3 Fewer He sells 5 and buys 2.
A man has many Ferraris.
He sells 5 and buys 2.
Does he now have more Ferraris or fewer Ferraris?
Fewer
How many fewer?
3 fewer
–5 + 2 = –3
If he originally had 10 Ferraris, then he now has 7.
If he originally had 23 Ferraris, then he now has 20.
If he originally had x Ferraris, then he now has x – 3.
If he originally had y Ferraris, how many does he have now?
y – 3

12. 3 fewer –5 + 2 = –3 x – 3 Fewer Susan has many Lamborghinis.
She sells 5 and buys 2.
Does she now have more Lamborghinis or fewer Lamborghinis?
Fewer
How many fewer?
3 fewer
–5 + 2 = –3
If Susan originally had x Lamborghinis, then how many does she have now?
x – 5?
x + 2?
x – 3?
x + 3?
x – 3