Understanding Addition of Signed Decimals

Understanding Addition of Signed Decimals

Assessment

Interactive Video

Mathematics

6th - 8th Grade

Hard

Created by

Jackson Turner

FREE Resource

The video tutorial explains how to add signed decimals, focusing on negative numbers. It begins by recognizing that the sum of two negative numbers is negative. The process involves calculating the absolute values of the numbers, summing them, and then assigning the correct negative sign to the result. The tutorial also demonstrates how to align decimal places for accurate addition and uses a number line to visualize the process, ensuring a comprehensive understanding of adding negative decimals.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the expected sign of the sum when adding two negative numbers?

Negative

It depends on the numbers

Positive

Zero

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in adding two negative decimals?

Multiply the numbers

Divide the numbers

Add the absolute values of the numbers

Subtract the smaller number from the larger one

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the absolute value of a number?

The number divided by two

The negative of the number

The number's distance from zero

The number itself

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it important to line up decimal places when adding decimals?

To simplify multiplication

To make the numbers look neat

To ensure accurate addition

To make subtraction easier

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the sum of the absolute values of 12.3 and 21.44?

32.74

33.74

31.74

34.74

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you determine the sign of the sum when adding two negative numbers?

The sign is always positive

The sign is always negative

The sign is the same as the larger number

The sign is the same as the smaller number

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the final sum of -12.3 and -21.44?

-34.74

34.74

33.74

-33.74

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