Exercise 58 Page 93

According to the order of operations, expressions inside parentheses are evaluated first, followed by exponents, then multiplication and division, and finally addition and subtraction are evaluated last. We can use the acronym PEMDAS to help us remember the correct order! Let's see the given expression! 19.6 ÷ 7 * 9 Following the order of operations, we need to start with the multiplication.

7 * 9

Multiply

Multiply

63

Let's substitute the result in the given expression. 19.6 ÷ 63 Now, we will perform the division. The calculations are easier if we multiply the divisor and the dividend by the same power of 10 so that the divisor is a whole number. In this case, we will multiply by 10. 19.6* 10 &=196 63* 10 &= 630 This means that 19.6÷ 63 is the same as 196÷ 630. Now we will find the quotient. We divide, multiply, subtract, and compare as many times as we need.

Since 196÷ 630≈ 0.31, we know that 19.6÷ 63≈ 0.31.