Exercise 59 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! 5.5 * 16.56 ÷ 9Following the order of operations, we need to start with the multiplication. We will multiply just as we do with two whole numbers. At first, we will ignore any decimal points.

Then we place the decimal point in the product by counting the number of decimal places in each factor.

The product of 5.5 and 16.56 is 91.080, or simply 91.08. Let's substitute the result of the product in the given expression. 91.08 ÷ 9 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 100. 91.08* 100 &=9108 9* 100 &= 900 This means that 91.08÷ 9 is the same as 9108÷ 900. Now we will find the quotient. We divide, multiply, subtract, and compare as many times as we need.

Since 9108÷ 900=10.12, we know that 91.08÷ 9=10.12.