Question

1. Evaluate the following, using distributive property.

(i) -39 × 99 (ii) (-85) × 43 +43 × (-15)

(iii) 53 × (-9) – (-109) × 53 (iv) 68 × (-17) + (-68) × 3

2. In a test, +3 marks are given for every correct answer and -1 mark are given

for every incorrect answer. Sona attempted all the questions and scored +20

marks, though she got 10 correct answers.

(i) How many incorrect answers has she attempted?

(ii) How many questions were given in the test?​

Answer 1

Answer:

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