line up the numbers and decimals multiply regularly then bring the decimal down
This is true for adding and subtracting ALL numbers, not just decimal representations.
No, it is not true.
You do not, but it is easier.
Lining the numbers up makes it easier to spot 0s between the decimal point and the leading non-zero digit.
explain why it is important to line up decimal numbers by their place value when you add or subtract them
Line up the decimal numbers like this, 100.5 + 9.0 then add normally and put in the decimal right below the decimal obove.^
line up the numbers and decimals multiply regularly then bring the decimal down
This is true for adding and subtracting ALL numbers, not just decimal representations.
It is easier to add up numbers. It may also be easier to spot errors where the decimal point is misplaced.
No, it is not true.
To add decimal numbers you line up the decimal points... _0.88 +0.035 --------- _0.915
So the decimal points line up and you can have a visual clue that larger numbers are longer.
Because the number of digits after the decimal place in a product does not require that.
You do not, but it is easier.
Line up the numbers in such a way that the decimal points are aligned. . Example: 567.89 - 23.4 567.89 - 23.4 ===== 544.49
Lining the numbers up makes it easier to spot 0s between the decimal point and the leading non-zero digit.