Question

James said (99) • (9-20) = 9-29. Is he correct? Justify your answer.

Answer 1

James's calculation of (99) • (9-20) as 9-29 is incorrect. The right answer, after multiplying 99 by -11 (the result of 9-20), is -1089.

Step-by-step explanation:

James stated that (99) • (9-20) equals 9-29, which is not correct.

Let's use basic arithmetic to determine the right answer:

First, calculate the expression inside the parentheses:
(9 - 20) = -11

Then, multiply this result by 99:
99 • (-11) = -1089

So, the correct result of the expression (99) • (9-20) is -1089, not 9-29.

Arithmetic is the branch of mathematics that deals with basic operations like addition, subtraction, multiplication, and division of numbers. It forms the foundation of mathematics and is used in various everyday tasks, from simple calculations to more complex problem-solving.