Chapter 2: Q. 1 (page 84)

Evaluate the expression. Justify each of your steps.
$1.29 + 18 + 21$

Short Answer

Expert verified

The value of the expression is68.

Step by step solution

Step 1. Order of operations

To evaluate any expression involving more than one operation, follow the below order of operations:

First evaluate expressions inside grouping symbols like parentheses ( ) or brackets [ ].
Evaluate the exponents.
Perform Multiplication and division from left to right.
Perform addition and subtraction from left to right.

Step 2. Add from left to right

To evaluate the given expression $29 + 18 + 21$ , first add the two numbers from left to right and then add the resulting number with the last number as shown below

$\begin{matrix} 29 + 18 + 21 = (29 + 18) + 21 \\ = (47) + 21 \\ = 47 + 21 \end{matrix}$

Step 3. Add the numbers

Now to simplify further, add the resulting number with the last number to get

$\begin{matrix} 29 + 18 + 21 = 47 + 21 \\ = 68 \end{matrix}$

Thus, the value of the expression is 68.

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Evaluate the expression. Justify each of your steps.
$1.29 + 18 + 21$

Short Answer

Step by step solution

Step 1. Order of operations

Step 2. Add from left to right

Step 3. Add the numbers

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Evaluate the expression. Justify each of your steps.1.29+18+21

Short Answer

Step by step solution

Step 1. Order of operations

Step 2. Add from left to right

Step 3. Add the numbers

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Theoretical and Mathematical Physics

Statistics

Geometry

Mechanics Maths

Pure Maths

Decision Maths

Study anywhere. Anytime. Across all devices.

Evaluate the expression. Justify each of your steps.
$1.29 + 18 + 21$