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Math Problems
Grade 8
Add and subtract numbers written in scientific notation
Add. Write your answer in scientific notation.
\newline
(
4.2
×
1
0
4
)
+
(
5.4
×
1
0
2
)
\left(4.2 \times 10^{4}\right)+\left(5.4 \times 10^{2}\right)
(
4.2
×
1
0
4
)
+
(
5.4
×
1
0
2
)
Get tutor help
Add. Write your answer in scientific notation.
\newline
(
3.2
×
1
0
2
)
+
(
4.047
×
1
0
2
)
(3.2 \times 10^2) + (4.047 \times 10^2)
(
3.2
×
1
0
2
)
+
(
4.047
×
1
0
2
)
\newline
Choices:
\newline
(A)
7.247
×
1
0
2
7.247 \times 10^2
7.247
×
1
0
2
\newline
(B)
9.74
×
1
0
2
9.74 \times 10^2
9.74
×
1
0
2
\newline
(C)
9.74
×
1
0
4
9.74 \times 10^4
9.74
×
1
0
4
\newline
(D)
7.247
×
1
0
4
7.247 \times 10^4
7.247
×
1
0
4
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Add. Write your answer in scientific notation.
\newline
(
1.568
×
1
0
5
)
+
(
4.79
×
1
0
5
)
(1.568 \times 10^5) + (4.79 \times 10^5)
(
1.568
×
1
0
5
)
+
(
4.79
×
1
0
5
)
\newline
Choices:
\newline
(A)
7.511
×
1
0
5
7.511 \times 10^5
7.511
×
1
0
5
\newline
(B)
6.358
×
1
0
10
6.358 \times 10^{10}
6.358
×
1
0
10
\newline
(C)
7.511
×
1
0
10
7.511 \times 10^{10}
7.511
×
1
0
10
\newline
(D)
6.358
×
1
0
5
6.358 \times 10^5
6.358
×
1
0
5
Get tutor help
Subtract. Write your answer in scientific notation.
\newline
(
9.736
×
1
0
3
)
−
(
3.931
×
1
0
3
)
(9.736 \times 10^3) - (3.931 \times 10^3)
(
9.736
×
1
0
3
)
−
(
3.931
×
1
0
3
)
\newline
Choices:
\newline
(A)
5.805
×
1
0
0
5.805 \times 10^0
5.805
×
1
0
0
\newline
(B)
5.805
×
1
0
3
5.805 \times 10^3
5.805
×
1
0
3
\newline
(C)
3.662
×
1
0
9
3.662 \times 10^9
3.662
×
1
0
9
\newline
(D)
3.662
×
1
0
6
3.662 \times 10^6
3.662
×
1
0
6
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Subtract. Write your answer in scientific notation.
\newline
(
9.832
×
1
0
3
)
−
(
1.645
×
1
0
3
)
(9.832 \times 10^3) - (1.645 \times 10^3)
(
9.832
×
1
0
3
)
−
(
1.645
×
1
0
3
)
\newline
Choices:
\newline
(A)
8.187
×
1
0
3
8.187 \times 10^3
8.187
×
1
0
3
\newline
(B)
7.725
×
1
0
3
7.725 \times 10^3
7.725
×
1
0
3
\newline
(C)
4.893
×
1
0
3
4.893 \times 10^3
4.893
×
1
0
3
\newline
(D)
1.094
×
1
0
3
1.094 \times 10^3
1.094
×
1
0
3
Get tutor help
Subtract. Write your answer in scientific notation.
\newline
(
9.04
×
1
0
9
)
−
(
5.86
×
1
0
9
)
(9.04 \times 10^9) - (5.86 \times 10^9)
(
9.04
×
1
0
9
)
−
(
5.86
×
1
0
9
)
\newline
Choices:
\newline
(A)
4
×
1
0
9
4 \times 10^9
4
×
1
0
9
\newline
(B)
5.17
×
1
0
9
5.17 \times 10^9
5.17
×
1
0
9
\newline
(C)
3.18
×
1
0
9
3.18 \times 10^9
3.18
×
1
0
9
\newline
(D)
9.423
×
1
0
9
9.423 \times 10^9
9.423
×
1
0
9
Get tutor help
Subtract. Write your answer in scientific notation.
\newline
(
9.832
×
1
0
3
)
−
(
1.645
×
1
0
3
)
(9.832 \times 10^3) - (1.645 \times 10^3)
(
9.832
×
1
0
3
)
−
(
1.645
×
1
0
3
)
\newline
Choices:
\newline
(A)
8.187
×
1
0
3
8.187 \times 10^3
8.187
×
1
0
3
\newline
(B)
1.094
×
1
0
3
1.094 \times 10^3
1.094
×
1
0
3
\newline
(C)
4.893
×
1
0
3
4.893 \times 10^3
4.893
×
1
0
3
\newline
(D)
7.725
×
1
0
3
7.725 \times 10^3
7.725
×
1
0
3
Get tutor help
Subtract. Write your answer in scientific notation.
\newline
(
2.116
×
1
0
5
)
−
(
1.09
×
1
0
5
)
(2.116 \times 10^5) - (1.09 \times 10^5)
(
2.116
×
1
0
5
)
−
(
1.09
×
1
0
5
)
\newline
Choices:
\newline
(A)
8.051
×
1
0
5
8.051 \times 10^5
8.051
×
1
0
5
\newline
(B)
1.026
×
1
0
5
1.026 \times 10^5
1.026
×
1
0
5
\newline
(C)
7.88
×
1
0
5
7.88 \times 10^5
7.88
×
1
0
5
\newline
(D)
2.64
×
1
0
5
2.64 \times 10^5
2.64
×
1
0
5
Get tutor help
Subtract. Write your answer in scientific notation.
\newline
(
6.9
×
1
0
9
)
−
(
3.89
×
1
0
9
)
(6.9 \times 10^9) - (3.89 \times 10^9)
(
6.9
×
1
0
9
)
−
(
3.89
×
1
0
9
)
\newline
Choices:
\newline
(A)
2.684
×
1
0
9
2.684 \times 10^9
2.684
×
1
0
9
\newline
(B)
2.684
×
1
0
10
2.684 \times 10^{10}
2.684
×
1
0
10
\newline
(C)
3.01
×
1
0
10
3.01 \times 10^{10}
3.01
×
1
0
10
\newline
(D)
3.01
×
1
0
9
3.01 \times 10^9
3.01
×
1
0
9
Get tutor help
Add. Write your answer in scientific notation.
\newline
(
3.955
×
1
0
3
)
+
(
2.473
×
1
0
3
)
(3.955 \times 10^3) + (2.473 \times 10^3)
(
3.955
×
1
0
3
)
+
(
2.473
×
1
0
3
)
\newline
Choices:
\newline
(A)
9.781
×
1
0
3
9.781 \times 10^3
9.781
×
1
0
3
\newline
(B)
6.428
×
1
0
3
6.428 \times 10^3
6.428
×
1
0
3
\newline
(C)
6.428
×
1
0
6
6.428 \times 10^6
6.428
×
1
0
6
\newline
(D)
9.781
×
1
0
6
9.781 \times 10^6
9.781
×
1
0
6
Get tutor help
Subtract. Write your answer in scientific notation.
\newline
(
9.832
×
1
0
3
)
−
(
1.645
×
1
0
3
)
(9.832 \times 10^3) - (1.645 \times 10^3)
(
9.832
×
1
0
3
)
−
(
1.645
×
1
0
3
)
\newline
Choices:
\newline
(A)
4.893
×
1
0
3
4.893 \times 10^3
4.893
×
1
0
3
\newline
(B)
7.725
×
1
0
3
7.725 \times 10^3
7.725
×
1
0
3
\newline
(C)
8.187
×
1
0
3
8.187 \times 10^3
8.187
×
1
0
3
\newline
(D)
1.094
×
1
0
3
1.094 \times 10^3
1.094
×
1
0
3
Get tutor help
Subtract. Write your answer in scientific notation.
\newline
(
9.04
×
1
0
9
)
−
(
5.86
×
1
0
9
)
(9.04 \times 10^9) - (5.86 \times 10^9)
(
9.04
×
1
0
9
)
−
(
5.86
×
1
0
9
)
\newline
Choices:
\newline
(A)
5.17
×
1
0
9
5.17 \times 10^9
5.17
×
1
0
9
\newline
(B)
4
×
1
0
9
4 \times 10^9
4
×
1
0
9
\newline
(C)
3.18
×
1
0
9
3.18 \times 10^9
3.18
×
1
0
9
\newline
(D)
9.423
×
1
0
9
9.423 \times 10^9
9.423
×
1
0
9
Get tutor help
Add. Write your answer in scientific notation.
\newline
(
1.568
×
1
0
5
)
+
(
4.79
×
1
0
5
)
(1.568 \times 10^5) + (4.79 \times 10^5)
(
1.568
×
1
0
5
)
+
(
4.79
×
1
0
5
)
\newline
Choices:
\newline
(A)
7.511
×
1
0
10
7.511 \times 10^{10}
7.511
×
1
0
10
\newline
(B)
6.358
×
1
0
5
6.358 \times 10^5
6.358
×
1
0
5
\newline
(C)
6.358
×
1
0
10
6.358 \times 10^{10}
6.358
×
1
0
10
\newline
(D)
7.511
×
1
0
5
7.511 \times 10^5
7.511
×
1
0
5
Get tutor help
Subtract. Write your answer in scientific notation.
\newline
(
7.15
×
1
0
5
)
−
(
5.964
×
1
0
5
)
(7.15 \times 10^5) - (5.964 \times 10^5)
(
7.15
×
1
0
5
)
−
(
5.964
×
1
0
5
)
\newline
Choices:
\newline
(A)
1.186
×
1
0
7
1.186 \times 10^7
1.186
×
1
0
7
\newline
(B)
1.186
×
1
0
6
1.186 \times 10^6
1.186
×
1
0
6
\newline
(C)
1.186
×
1
0
5
1.186 \times 10^5
1.186
×
1
0
5
\newline
(D)
1.186
×
1
0
4
1.186 \times 10^4
1.186
×
1
0
4
Get tutor help
Subtract. Write your answer in scientific notation.
\newline
(
9.736
×
1
0
3
)
−
(
3.931
×
1
0
3
)
(9.736 \times 10^3) - (3.931 \times 10^3)
(
9.736
×
1
0
3
)
−
(
3.931
×
1
0
3
)
\newline
Choices:
\newline
(A)
3.662
×
1
0
9
3.662 \times 10^9
3.662
×
1
0
9
\newline
(B)
3.662
×
1
0
6
3.662 \times 10^6
3.662
×
1
0
6
\newline
(C)
5.805
×
1
0
0
5.805 \times 10^0
5.805
×
1
0
0
\newline
(D)
5.805
×
1
0
3
5.805 \times 10^3
5.805
×
1
0
3
Get tutor help
Add. Write your answer in scientific notation.
\newline
(
5.059
×
1
0
4
)
+
(
2.7
×
1
0
4
)
(5.059 \times 10^4) + (2.7 \times 10^4)
(
5.059
×
1
0
4
)
+
(
2.7
×
1
0
4
)
\newline
Choices:
\newline
(A)
5.086
×
1
0
4
5.086 \times 10^4
5.086
×
1
0
4
\newline
(B)
7.759
×
1
0
8
7.759 \times 10^8
7.759
×
1
0
8
\newline
(C)
5.086
×
1
0
8
5.086 \times 10^8
5.086
×
1
0
8
\newline
(D)
7.759
×
1
0
4
7.759 \times 10^4
7.759
×
1
0
4
Get tutor help
Add and write your answer in scientific notation.
\newline
(
5.059
×
1
0
4
)
+
(
2.7
×
1
0
4
)
(5.059 \times 10^4) + (2.7 \times 10^4)
(
5.059
×
1
0
4
)
+
(
2.7
×
1
0
4
)
Get tutor help
Subtract. Write your answer in scientific notation.
\newline
(
9.04
×
1
0
9
)
−
(
5.86
×
1
0
9
)
(9.04 \times 10^9) - (5.86 \times 10^9)
(
9.04
×
1
0
9
)
−
(
5.86
×
1
0
9
)
\newline
Choices:
\newline
(A)
9.423
×
1
0
9
9.423 \times 10^9
9.423
×
1
0
9
\newline
(B)
3.18
×
1
0
9
3.18 \times 10^9
3.18
×
1
0
9
\newline
(C)
5.17
×
1
0
9
5.17 \times 10^9
5.17
×
1
0
9
\newline
(D)
4
×
1
0
9
4 \times 10^9
4
×
1
0
9
Get tutor help
Find the sum of the geometric series
\newline
1
−
3
+
3
2
−
3
3
+
…
−
3
29
1-3+3^{2}-3^{3}+\ldots-3^{29}
1
−
3
+
3
2
−
3
3
+
…
−
3
29
\newline
Choose
1
1
1
answer:
\newline
(A)
−
1.03
⋅
1
0
14
-1.03 \cdot 10^{14}
−
1.03
⋅
1
0
14
\newline
(B)
−
6.86
⋅
1
0
13
-6.86 \cdot 10^{13}
−
6.86
⋅
1
0
13
\newline
(C)
−
5.15
⋅
1
0
13
-5.15 \cdot 10^{13}
−
5.15
⋅
1
0
13
\newline
(D)
1.72
⋅
1
0
13
1.72 \cdot 10^{13}
1.72
⋅
1
0
13
Get tutor help
Factor
48
−
8
x
48-8 x
48
−
8
x
to identify the equivalent expressions.
\newline
Choose
2
2
2
answers:
\newline
A
3
(
16
−
8
x
)
3(16-8 x)
3
(
16
−
8
x
)
\newline
B
2
(
24
−
4
x
)
2(24-4 x)
2
(
24
−
4
x
)
\newline
c
8
(
6
−
x
)
8(6-x)
8
(
6
−
x
)
\newline
D
4
(
12
−
4
x
)
4(12-4 x)
4
(
12
−
4
x
)
Get tutor help
Factor
24
m
−
12
p
+
72
24 m-12 p+72
24
m
−
12
p
+
72
to identify the equivalent expressions.
\newline
Choose
2
2
2
answers:
\newline
A
6
(
4
m
+
2
p
+
12
)
6(4 m+2 p+12)
6
(
4
m
+
2
p
+
12
)
\newline
B
2
(
12
m
−
6
p
+
36
)
2(12 m-6 p+36)
2
(
12
m
−
6
p
+
36
)
\newline
c
12
(
2
m
−
p
+
6
)
12(2 m-p+6)
12
(
2
m
−
p
+
6
)
\newline
D
24
(
m
−
12
p
+
3
)
24(m-12 p+3)
24
(
m
−
12
p
+
3
)
Get tutor help
Factor
30
−
6
v
−
18
w
30-6 v-18 w
30
−
6
v
−
18
w
to identify the equivalent expressions.
\newline
Choose
2
2
2
answers:
\newline
A
2
(
15
−
12
v
)
2(15-12 v)
2
(
15
−
12
v
)
\newline
B
3
(
10
−
3
v
+
6
w
)
3(10-3 v+6 w)
3
(
10
−
3
v
+
6
w
)
\newline
c
6
(
5
−
v
−
3
w
)
6(5-v-3 w)
6
(
5
−
v
−
3
w
)
\newline
D
2
(
15
−
3
v
−
9
w
)
2(15-3 v-9 w)
2
(
15
−
3
v
−
9
w
)
Get tutor help
