Mental Math....a review.

1
Mental Math....a review.
Try answering the following questions with out
writing down any calculations. You will have
about 45 seconds to 1 minute to answer each
question before the next will appear. Record your
answers on a sheet of loose leaf. Good luck!
2
Part 1
Q1 - Q15
3
Q1
What is the complimentary angle to 36 degrees?
4
Q2
What is the supplementary angle to 110 degrees?
5
Q3
What is the classification name of an angle that
is greater than 180 degrees and less than 360
degrees?
6
Q4
What place value is the 6 in 463 742 ?
7
Q5
Write the following number in expanded form, 5
709.
8
Q6
If the millions place is 10 to the power of 6
then what is the power for the billions place?
9
Q7
Write in standard form,8 x 105 6 x 103 5 x
102 4 x 10-1
10
Q8
What is the expanded and standard form of 34?
11
Q9
What are the factors of 24?
12
Q10
What are the common factors of 18 and 27?
13
Q11
What is the GCF of 28 and 42?
14
Q12
What would the final line of this factor tree
look like?
x
15
Q13
What are the first 5 multiples of 7?
16
Q14
What is the first common multiple of 6 and 8?
17
Q15
What is the lowest terms fraction for 25/35?
18
Part 1 Answers
click
Part 2
Q16 - Q30
19
Q16
Which fraction is largest, ½ , 4/5, 6/7 or
2/3?
20
Q17
What fraction is yellow?
21
Q18
Draw and shade in 9/12 of the shape.
22
Q19
Which decimal answer is equivalent to the
fraction, 11/25? (0. 11 or 11.25 or 0.22 or
0.44)
23
Q20
What is the lowest terms fraction for 0.8?
24
Q21
Change the following Improper Fraction to a Mixed
Number.26/3
25
Q22
Change the following Mixed Number to an Improper
Fraction.7 and 1/3
26
Q23
Which fraction gives a repeating decimal. ( 8/10
, 6/7 , 6/9 , or 18/25 )
27
Q24
Evaluate 4 x 9 ( 4 6 )
28
Q24
Evaluate (4 x 7) 42 - 10
29
Q25
Solve 4 ( - 8 )
30
Q26
What addition equation is represented by
31
Q27
Solve with a remainder 186 divided by 5
32
Q28
Solve 241 x 6
33
Q29
Solve (24 38) x 4
34
Q30
Write in Scientific Notation. 450 600
35
Answers
Part 1
Q1 - Q15

• 1. 54 degrees
• 2. 70 degrees
• 3. reflex angle
• 4. Ten thousands
  or (10 000)
• 5 x 103 7 x 102 9 x 100
• 6. 9

• 7. 806 500.4
• 8. 3 x 3 x 3 x 3 81
• 9. 1,2 3,4, 6, 8, 12, 24
• 10. 1, 3, 9
• 14
• 2 x 2 x 2 x 3
• 13. 7, 14, 21, 28, 35, 42

14. 24 15. 5/7
36
Answers
Part 2
Q16 - Q30
16. 6/7 17. 2/3 18. shade in 4.5 out of the
6 slices 19. 0.44 20. 4/5

• 21. 8 2/3
• 22. 22/3
• 6/9
• (0.6666666)
• 24. 26
• 24. 34

25. -4 26. -64-2 27. 37 R1 28. 1446 29.
248 30. 4.506 x 105