+

# Math in Focus - 3A Lesson 12.1 (including Recall Prior Knowledge)

&nbsp;
Actions
• Report
Embed
##### Rating:
(7)
• (6)
• (0)
• (0)
• (0)
• (1)
Author: CHRIS BRENNAN
##### Objective:

This tutorial covers Math in Focus Lesson 12.1 (Real-World Problems: One-Step Problems).  I begin by "recalling prior knowledge" about bar models and then move on to using bar models and addition, subtraction, multiplication, and division to solve real-world problems.

(more)
Tutorial

## Video 4: Lesson 12.1 Guided Practice 1

This video will show you how to use addition and a part/part/whole bar model to find the answer.

## Video 5: Lesson 12.1 Guided Practice 2

In this problem, I use addition and a part/part/whole bar model to find the answer.

## Video 6: Lesson 12.1 Guided Practice 3

In this video, I use addition and a part/part/whole bar model to find an answer, and then convert the answer from grams to kilograms. Remember: 1000 grams = 1 kilogram!

## Video 7: Lesson 12.1 Guided Practice 4

In this video we use addition to find the answer, and then convert meters into kilometers. Remember, 1 kilometer = 1,000 meters!

## Video 8: Lesson 12.1 Guided Practice 5

Are we adding in this video? No! This problem calls for a comparison bar model instead of a part/part/whole bar model to find the answer.

## Video 9: Lesson 12.1 Guided Practice 6

In this video, I use multiplication and a bar model to find the answer to two different problems.

## Lesson 12.1 Guided Practice 7

To conclude Lesson 12.1, I use division and a bar model to find the answer.

### Do the math. Our College Algebra Course is only \$329.

Sophia's online courses not only save you money, but credits are also eligible for transfer to over 2,000 colleges and universities.*