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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.
you can line up the decimals
by adding or subtracting the values of the digits in the front place
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.
to add decimals: -line up the decimal points -then starting at the farthest place to the right, add the decimal in each place -if the sum of the digits in a place are greater than nine,regroup the number to the place to its left. -check the sum by writing each decimal as an equivalent fraction and then adding these numbers or mixed numbers.
because if you don't know the place value you might have trouble answering the question and you might get it wrong .
Yes, When Adding and Subtracting decimals you should line up the decimals. You need to keep each place value in the same column, the same as when you add whole numbers you keep the ones column lined up, same for the tens, etc. Lining up the decimal points makes sure that the tenths column is kept together, same for the hundredths, and so on.
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.
you can line up the decimals
Hey awesome Question. The answer is no you do not have to line up the decimals when multyping only when adding and subtracting. The main thing is when you multiply make sure you put the decimal in the right place in your answer. YOu count how may places their are behind the decimals in BOTH numbers then you make sure their are that many places behind the decimal in you answer. :)
by adding or subtracting the values of the digits in the front place
It stops you from adding tens to hundreds, or subtracting thousands from millions. The place value is used to line up columns correctly to ensure that the correct values are being used. The decimal point is the deciding factor in locating the proper numbers.
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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.
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Adding whole numbers is the addition of decimals where the decimal part is zero; in both cases the digits are place value aligned meaning that the decimal points, which lies between the units (or ones) and tenths columns, are aligned - in the whole number the decimal point is "hiding" at the end.
The decimal point, which I think you meant, is lined up vertically in a row of numbers to be summed.