Download Grade 8 Math PRACTICE Unit Test 1 Number Sense Answers 1

Grade 8 Math PRACTICE Unit Test 1
Number Sense Answers 1
1. State the place value of the digit 8
in each number.
a) 78 ones
b) 183 210
ten thousands
c) 58 154 021 millions
2. Write the following number in
words, the correct way that you
would say it.
65 097
Sixty-five thousand ninety seven
3. Convert the following number
a) from normal expanded form to
expanded form with powers of 10.
(4 x 100 000) + (3 x 1000) +
(8 x 100) + (2 x 1)
= (4 x 105)+(3x103)+(8x102)+
(2x100)
b) Then to standard form (as a regular
number):
= (400 000)+(3000)+(800)+(2)
= 403 802
4. Convert the following number from
standard form to expanded form.
56 042
=(5x10 000)+(6x1000)+ (0x100)
+(4x10)+(2x1)
5. In the power 103
a) Which number is the base?
10
b) Which number is the exponent?
3
c) Write this number as multiples
of the base (number x number x
number…)
= 10 x 10 x 10
d) Write this number in standard
form.
= 1000
6. Write the following number in
expanded form with powers of 10.
4 126
=(4x1000)+(1x100)+(2x10)+
(6x1)
=(4x10 )+(1x10 )+(2x10 )+
(6x100)
3
2
1
7. Put the following number in
scientific notation.
25 000 000
= 2.5 x 107
8. Draw the factor tree for the
number: 16 Put your final answer
in powers of primes if possible.
9.
16
OR
16
=2x8
=4x4
=2x2x4
=2x2x4
=2x2x2x2
=2x2x2x2
= 24
= 24
Same answer, either way ok
10. Solve the following: (32 -2) x 4
= (3 x 3 – 2) x 4
= (9 - 2) x 4
= (7) x 4
=28
Multiple Choice:
11. The correct way to write the
number 326 000 in scientific
notation is: C
a) 326
b) 326 x 10 x 10 x 10
c) 3.26 x 105
d) 3 x 2 x 6
12. Another way to say: 73 is a
a) seven cubed
b) seven squared
c) seven times three
d) seventy three
13. Which of the following numbers
is a prime number? d
a) 4
b) 6
c) 10
d) 7
14. Write the correct order of
operations (i.e. division,
addition…) when solving a multistep math question.
1. Brackets
2. Exponents
3. Division
4. Multiplication
5. Addition
6. Subtraction