Mathematics 2017 JAMB Past Questions - Question 7: Evaluate 1 - (1/5 x 1 2/3) + (5:-1 2/3)

Correct Answer

C

Explanation

To evaluate the expression 1 - (1/5 x 1 2/3) + (5 ÷ -1 2/3), we can follow the order of operations (parentheses, multiplication and division from left to right, addition and subtraction from left to right).First, let's convert the mixed numbers to improper fractions:1 2/3 = 5/3Now, we can proceed with the calculations:1 - (1/5 x 5/3) + (5 ÷ (-1 2/3))1 - (1/5 x 5/3) + (5 ÷ (-5/3))1 - (1/3) + (-15/5)1 - 1/3 - 33/3 - 1/3 - 32/3 - 3To subtract a whole number from a fraction, we need to express the whole number as a fraction with the same denominator:2/3 - 9/3= -7/3So, the value of the expression is -7/3.