GRADE 9 MENTAL MATH

1
GRADE 9 MENTAL MATH

• Lesson 1.2

2
Evaluate
3
Evaluate
4
Evaluate
5
Evaluate

• 110 x 440

6
Evaluate

• 0.9 x 63 x 0

7
Evaluate
8
Evaluate
9
Evaluate
10
Evaluate
11
Evaluate
12
Insert the symbol, lt or gt, that makes the
statement true.
13
Insert the symbol, lt or gt, that makes the
statement true.
14
Choose the best answer
What is the circumference of a circle that has a
diameter of 47 cm ?

1. 7000 cm
2. 1700 cm
3. 300 cm
4. 150 cm

15
Choose the best answer
What is the radius of a circle that has an area
of 110cm2 ?

1. 35 cm
2. 18 cm
3. 6 cm
4. 38 000 cm

16
Choose the best answer
What is the volume of a cube that has edges of
length 9 cm ?

1. 450 cm3
2. 750 cm3
3. 1050 cm3
4. 1350 cm3

17
1. Evaluate
ANSWER 66
18
2. Evaluate
ANSWER 36
19
3. Evaluate
ANSWER 21
20
4. Evaluate

• 110 x 440

ANSWER 484
21
5. Evaluate

• 0.9 x 63 x 0

ANSWER 0
22
6. Evaluate
ANSWER 64
23
7. Evaluate
ANSWER 4
24
8. Evaluate
ANSWER -4.1
25
9. Evaluate
ANSWER 1 1/3
26
10. Evaluate
ANSWER 8
27
11. Insert the symbol, lt or gt, that makes the
statement true.
ANSWER lt
28
12. Insert the symbol, lt or gt, that makes the
statement true.
ANSWER gt
29
13. Choose the best answer
What is the circumference of a circle that has a
diameter of 47 cm ?

1. 7000 cm
2. 1700 cm
3. 300 cm
4. 150 cm

ANSWER D
30
14. Choose the best answer
What is the radius of a circle that has an area
of 110cm2 ?

1. 35 cm
2. 18 cm
3. 6 cm
4. 38 000 cm

ANSWER C
31
15. Choose the best answer
What is the volume of a cube that has edges of
length 9 cm ?

1. 450 cm3
2. 750 cm3
3. 1050 cm3
4. 1350 cm3

ANSWER B