Grade 8 Maths Rational Numbers Quiz (Part A)

Answer explanation

To simplify the expression, first find a common denominator for -5/16 and 7/12, which is 48. Then, calculate (-5*3 + 7*4)/48 = 13/48.

Tags

CCSS.7.NS.A.1C

Answer explanation

To find the sum, first find a common denominator for -15 and -3, which is -15. Then, calculate (-8/15) + (-20/15) = -28/15.

Tags

CCSS.7.NS.A.1C

Tags

CCSS.7.NS.A.1C

Answer explanation

To simplify the expression, first calculate the fraction. 3 + \frac{5}{-7} = 3 - \frac{5}{7} = \frac{21-5}{7} = \frac{16}{7}

Tags

CCSS.7.NS.A.1C

Answer explanation

To find the sum, first calculate the individual fractions. Then add them together to get (-rac{31}{4}) + (-rac{5}{8}) = -rac{67}{8}

Tags

CCSS.7.NS.A.1C

Answer explanation

To find what should be added to \frac{7}{12} to get \frac{-4}{15}, subtract the two fractions: \frac{-4}{15} - \frac{7}{12} = \frac{-17}{20}. Therefore, the correct answer is \frac{-17}{20}.

Tags

CCSS.7.NS.A.1C

Answer explanation

To find the sum, add the fractions together: -13/60 is the result after simplifying the sum of the fractions.

Tags

CCSS.7.NS.A.1C

Answer explanation

To find the other number, subtract -5 from the sum of the two numbers. -4/3 - (-5) = 11/3. Therefore, the other number is 11/3.

Tags

CCSS.7.NS.A.1C

Answer explanation

To find what should be added to -5/7 to get -2/3, subtract -5/7 from -2/3: (-2/3) - (-5/7) = 1/21. Therefore, the correct answer is 1/21.

Tags

CCSS.7.NS.A.1C

Answer explanation

To find the value to subtract, we need to subtract -5/3 from 5/6. This is equivalent to 5/6 - (-5/3) = 5/6 + 5/3 = 5/6 + 10/6 = 15/6 = 5/2. Therefore, the correct answer is -5/2.

Tags

CCSS.7.NS.A.1B