The reciprocal of \({-3\over8 } \times {-24\over 13}\) is

1

(a)

\(9\over 13\)

(b)

\(-9\over 13\)

(c)

\(-13 \over 9\)

(d)

\(13\over9\)

Zero (0) is

1

(a)

the identity for addition of rational numbers

(b)

the identity for subtraction of rational numbers

(c)

the identity for multiplication of rational numbers

(d)

the identity for division of rational numbers.

Numbers	Commutative for
	Addition	Subtraction	Multiplication	Division
Whole numbers	___________	___________	Yes	__________

1

(a)

Numbers	Commutative for
	Addition	Subtraction	Multiplication	Division
Whole numbers	yes e.g (0+7=7+0) \(\Rightarrow 7=7\) which is true.	No  \((5-4\neq 4-5)\\1\neq -1 \) which is not true.'​​​​​​​	Yes \(e.g (5\times4=4\times5)\\ \Rightarrow 20=20\) which is true.	No e.g \((5\div0\neq0\div5)\\\) ​​​​​​​which is not true.

The reciprocal of a positive rational number is _________________

1

(a)

positive

The rational number 9.99 in the form of \(p\over q\) is ________________

1

(a)

\({999\over100},\because9.99={999\over100}\)

\(-4\over5\)  is greater than \(-5\over4\)

1

(a) False

(b) True

\({2\over3}-{5\over4}={5\over4}-{2\over3}\)

1

(a) True

(b) False

If \({a\over b}\) is a rational number, then b can be any whole number

1

(a) True

(b) False

Is there a rational number that is equal to its negative? If yes, write it.

1

(a)

Yes, 0

What is the reciprocal of the reciprocal of \(\frac { 1 }{ 2 } \)?

1

(a)

\(\frac { 1 }{ 2 } \)

Write the additive inverse of the following  \(19\over-6\)

2

(a)

Tell what property allows you to compute \({1\over3}\times({6\times {4\over3}}) as ({1\over3}\times 6)\times{4\over3} \)

2

(a)

Is \(\frac{2}{3} \times (\frac{-6}{7} \times \frac{4}{5})=(\frac{2}{3} \times \frac{-6}{7})\times \frac{4}{5} ?\)

2

(a)

Using appropriate properties, find \({-2\over3}\times{3\over5}+{5\over2}-{3\over5}\times{1\over6}\)

3

(a)

Solve \(-5+{7\over10}+{3\over7}+(-3)+{5\over14}+{-4\over5}\)

3

(a)

Compute the sum of multiplicative inverse and additive Inverse of \(-{2\over3}\)

3

(a)

Find five rational numbers between \(-{1\over2}and{2\over3}\)

5

(a)