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

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

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The simplest way is to line up the numbers so that their decimal points are aligned, and corresponding digits are also aligned according to their place value.

It is important to add and subtract integers: to get a new integer value in mathematics .

Almost all numbers that we use in daily life are decimal numbers. The place value of each digit is ten times the place value of the digit to its right. And that is all that is required of decimal numbers. A decimal point is not necessary.

A decimal is a way of representing a number. There is no number after a number.A decimal is NOT a decimal point.

By the signs: 2+2(Add) 2-2(Subtract) +=add -=subtract

Related questions

explain why it is important to line up decimal numbers by their place value when you add or subtract them

It isn't really that important, it just makes the problem solving easier and gives you less of a chance of making a mistake.

The simplest way is to line up the numbers so that their decimal points are aligned, and corresponding digits are also aligned according to their place value.

How To Add/Subtract DecimalsTo add decimals you HAVE TO LINE UP THE DECIMAL POINTS and then add the numbers up (Tip: when your first starting if the decimals don't go to the same place value you can add as may zeros at the END of the decimal. This does NOT change the place value)After you have added up the digits you "drop" the decimal point down.Example 105.43+23.4=?105.43+23.40-----------128.83To subtract decimals it's the same thing as adding YOU MUST LINE UP THE DECIMALS. You would subtract as you normally would.You would then "drop" down the decimal point.Example 109.783-43.39=?109.783-43.390----------66.393

It is important to add and subtract integers: to get a new integer value in mathematics .

Almost all numbers that we use in daily life are decimal numbers. The place value of each digit is ten times the place value of the digit to its right. And that is all that is required of decimal numbers. A decimal point is not necessary.

A decimal is a way of representing a number. There is no number after a number.A decimal is NOT a decimal point.

By the signs: 2+2(Add) 2-2(Subtract) +=add -=subtract

1.20 has the same value as 1.2 and they are both decimal numbers

add the three numbers the subtract 180 from your sum

The simplest way is to line up the numbers so that their decimal points are aligned, and corresponding digits are also aligned according to their place value.

Subtract the absolute value of the smaller number from the absolute value of the larger number. The answer will have the sign of the larger numbers.