Problem 85 In the following exercises, add.... [FREE SOLUTION]

91影视

Prealgebra

Lynn Marecek, MaryAnne Anthony-Smith

$Math Studyset 91影视 Explanations$ Math

2016 Edition

Chapter 1: Problem 85

In the following exercises, add. $$71 + 28$$

Short Answer

Expert verified

Step by step solution

Line Up the Numbers

Write the numbers one below the other, aligning them by their units place. \[\begin{array}{r}71 \+ \ 28 \hline\end{array}\]

Add the Units Place

Add the digits in the units place (rightmost column). 1 + 8 = 9. Write 9 below the line in the units place.

Add the Tens Place

Add the digits in the tens place (leftmost column). 7 + 2 = 9. Write 9 below the line in the tens place. \[\begin{array}{r}71 \+ \ 28 \hline99 \end{array}\]

Unlock Step-by-Step Solutions & Ace Your Exams!

Full Textbook Solutions
Get detailed explanations and key concepts
Unlimited Al creation
Al flashcards, explanations, exams and more...
Ads-free access
To over 500 millions flashcards
Money-back guarantee
We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Aligning Numbers

When performing addition, aligning numbers correctly is the first crucial step. It ensures that each digit lines up with the others in their respective places, making the process straightforward. Place the numbers one below the other, starting with the units place (the rightmost digits). This alignment helps prevent mistakes while adding. For example, here is how you align the numbers 71 and 28:

Write 71.
Right below it, write 28, aligning the 8 under the 1.
Draw a horizontal line under both numbers to separate them from the result.

Once the numbers are aligned, you can start adding them.

Adding Units Place

After aligning the numbers, begin with the units place. This is the rightmost column. Adding these digits first helps avoid confusion and ensures accuracy. For the example of 71 + 28:

Identify the digits in the units place: 1 (from 71) and 8 (from 28).
Add these numbers together: 1 + 8 = 9.
Write 9 directly below the line in the units place.

This step ensures that the sum of the units is correctly placed in the final answer.

Adding Tens Place

Next, move to the tens place, which is the second column from the right. It's essential to add these digits correctly to complete your addition problem accurately. For our example, 71 + 28, here's how you do it:

Identify the digits in the tens place: 7 (from 71) and 2 (from 28).
Add these numbers together: 7 + 2 = 9.
Write 9 directly below the line in the tens place.

After this step, your final answer should be visible at the bottom, giving you a sum of 99 for 71 + 28. Remember, always start from the units place and then move to the tens place to ensure each digit is correctly accounted for.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Recommended explanations on Math Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

91影视

In the following exercises, add. $$71 + 28$$

Short Answer

Step by step solution

Line Up the Numbers

Add the Units Place

Add the Tens Place

Key Concepts

Aligning Numbers

Adding Units Place

Adding Tens Place

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Theoretical and Mathematical Physics

Mechanics Maths

Statistics

Geometry

Logic and Functions

Applied Mathematics

Study anywhere. Anytime. Across all devices.