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Math Problems
Grade 7
Multiply and divide rational numbers
Multiply.
\newline
−
3
5
×
1
2
=
-\frac{3}{5} \times \frac{1}{2} =
−
5
3
×
2
1
=
_____
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Multiply.
\newline
1
2
×
−
1
5
=
\frac{1}{2} \times -\frac{1}{5} =
2
1
×
−
5
1
=
_____
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Multiply.
\newline
−
1
4
×
−
4
5
=
-\frac{1}{4} \times -\frac{4}{5} =
−
4
1
×
−
5
4
=
_____
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Multiply.
\newline
1
2
×
3
4
=
\frac{1}{2} \times \frac{3}{4} =
2
1
×
4
3
=
_____
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Multiply.
\newline
3
5
×
−
1
2
=
\frac{3}{5} \times -\frac{1}{2} =
5
3
×
−
2
1
=
_____
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Multiply.
\newline
1
2
×
1
4
=
\frac{1}{2} \times \frac{1}{4} =
2
1
×
4
1
=
_____
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Multiply.
\newline
−
4
5
×
1
8
=
-\frac{4}{5} \times \frac{1}{8} =
−
5
4
×
8
1
=
_____
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5
2
(
x
−
1
)
×
5
x
+
1
=
0.04
5^{2(x-1)} \times 5^{x+1}=0.04
5
2
(
x
−
1
)
×
5
x
+
1
=
0.04
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Multiply.
\newline
3
x
(
2
x
+
5
)
3 x(2 x+5)
3
x
(
2
x
+
5
)
\newline
3
x
(
2
x
+
5
)
=
3 x(2 x+5)=
3
x
(
2
x
+
5
)
=
□
\square
□
(Simplify your answer.)
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2.8
e
x
t
0.2
2.8 ext{ }0.2
2.8
e
x
t
0.2
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7
x
2
−
5
x
+
13
=
0
7x^2-5x+13=0
7
x
2
−
5
x
+
13
=
0
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Multiply:
\newline
−
0.1
×
−
2
5
=
-0.1 \times \frac{-2}{5}=
−
0.1
×
5
−
2
=
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