Best Answer

Because when adding or subtracting, the operations must take account of the place values of individual digits in the numbers. When multiplying, only the overall order of magnitudes are relevant for placing the decimal point in the product.

User Avatar

Wiki User

โˆ™ 2018-03-31 16:27:19
This answer is:
User Avatar
Study guides
See all cards
14 Reviews

Add your answer:

Earn +20 pts
Q: Why is it important to line up the decimal points when adding or subtracting but not when multiplying?
Write your answer...
Still have questions?
magnify glass
Related questions

How are adding subtracting decimals different from multiplying them?

They aren't. The rules are the same as those for adding/subtracting or multiplying integers. Just be careful of the decimal point's location.

Do you need a common denominator when adding subtracting multiplying or dividing?

only when adding and subtracting

When do you line up the decimal?

you only line the decimals up when you are subtracting or adding not when you are multiplying im not sure about division...

What are the rules for adding subtracting multiplying and dividing fractions?

no answer

What is 16 78?

To answer this question we need to know if you are multiplying, adding, subtracting, or dividing. If you are adding it would be 94. For multiplying it would be 1248. If subtracting it would be negative 62.

How are decimals used as a carpenter?

adding subtracting multiplying and dividing

What are the examples of the uses of integers?

adding, subtracting, multiplying, dividing

Why is it important to align decimal point when adding or subtracting decimal numbers?

Because if you dont , your answer will be a whole number and that will make your answer wrong

How do you find a multiple when subtracting fractions?

Same as adding, multiplying, and dividing.

What in math?

math is adding, subtracting, multiplying, dividing, angles and more

Do you need a common denominator when multiplying?

Nope, just when adding or subtracting.

How do you use a tool for adding subtracting multiplying and dividing numbers?


What maths skills do you need to be a carpenter?

Adding, subtracting, multiplying, dividing, and measuring

What is the word you call adding subtracting multiplying and dividing?

That would be called the operations.

Explain how to solve a whole-number equation?

by adding, subtracting, dividing, and multiplying.

What is equivalent to adding 10 percent?

adding x*0.10 or multiplying by 2 and subtracting 90% of half

What is the rule for significant figures when adding or subtracting decimals?

When adding and/or subtracting, your answer can only show as many decimal places as the measurement having the fewest number in the decimal places.

When subtracting or adding numbers in scientific notation why do the exponents need to be the same?

This is effectively the same as lining up the decimal points when adding or subtracting ordinary decimal fractions.

Can zero change a sum?

Adding or subtracting zero cant, multiplying or dividing by zero can.

What can help you with your adding and subtracting and multiplying and divide?

a calculator what r u havin trouble with

Can a negative and a positive make a positive?

When adding- yes When subtracting-no When multiplying-no When dividing-yes

Why it is important to line up decimal numbers by their play value when you add or subtract them?

This is true for adding and subtracting ALL numbers, not just decimal representations.

Do you have to line up the decimal when you are adding?

You have to line up the decimal when adding but not when multiplying. Example: This one is adding 23.56+89.45 23.56 89.45 This one is multiplying 23.54*4.506 23.54 4.506

Why is it permissible to write zeros as placeholder when adding or subtracting with decimal?


When do you need to write zero as a placeholder when adding and subtracting decimals?

Adding decimal same as adding whole numbers