Adding Decimals: Key Concepts and Techniques

Adding Decimals: Key Concepts and Techniques

Assessment

Interactive Video

Mathematics

6th - 10th Grade

Hard

Created by

Lucas Foster

FREE Resource

This video tutorial for 5th graders covers lesson 3.8 on adding decimals. It begins with an essential question about how place value aids in adding decimals. The lesson includes steps for estimating sums by rounding, aligning decimal points, and adding decimals through examples. Real-world problem-solving questions are also addressed. The video concludes with homework instructions and a self-assessment task.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the essential question for this lesson?

How can place value help you subtract decimals?

How can place value help you add decimals?

How can place value help you multiply decimals?

How can place value help you divide decimals?

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When estimating the sum of 12.78 and 31.14, what is the first step?

Subtract the smaller number from the larger number.

Add the numbers directly.

Round each number to the nearest whole number.

Align the decimal points.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the estimated sum of 4.23 and 6.50 when rounded to the nearest whole number?

10

11

12

13

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it important to align decimal points when adding decimals?

To make the numbers look neat.

To ensure the correct place values are added together.

To make the addition faster.

To avoid rounding errors.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the sum of 25.47 and 7.24?

30.71

32.71

33.71

31.71

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you handle different decimal places when adding 2.7 and 5.37?

Subtract the smaller number from the larger number.

Round both numbers to the nearest whole number.

Add zeros to make the decimal places equal.

Ignore the extra decimal places.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Marcela's dog gained 4.1 kg in two months. If the dog's mass was 5.6 kg two months ago, what is its current mass?

7.7 kg

8.7 kg

10.7 kg

9.7 kg

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