Question

На примере вычисления суммы и разности чисел 5,63 и 4,972 объясните,как складывают и вычитают десятичные дроби.

Answer 1

Просто вычетаешь столбиком, не обращая внимания на запятые...а после смотришь где больше цифр после запятой, в этом случае 3 и отщитываешь 3 цифры с конца и ставишь запятую, получается 0,658

Answer 2

Adding Decimal Fractions

To add decimal fractions, such as 5.63 and 4.972, follow these steps:

1. Align the decimal points of the numbers. 2. Add the digits in each column, starting from the rightmost column. 3. If the sum of the digits in a column is 10 or greater, carry over the excess to the next column.

Let's apply these steps to the example:

   5.63
+ 4.972
-------

1. Align the decimal points:

   5.63
+ 4.972
-------

2. Add the digits in each column:

   5.63
+ 4.972
-------
  10.602

3. Carry over the excess, if any:

In this case, there is no excess to carry over.

Therefore, the sum of 5.63 and 4.972 is 10.602.

Subtracting Decimal Fractions

To subtract decimal fractions, such as 5.63 and 4.972, follow these steps:

1. Align the decimal points of the numbers. 2. Subtract the digits in each column, starting from the rightmost column. 3. If the digit being subtracted is larger than the digit it is being subtracted from, borrow from the next column.

Let's apply these steps to the example:

   5.63
- 4.972
-------

1. Align the decimal points:

   5.63
- 4.972
-------

2. Subtract the digits in each column:

   5.63
- 4.972
-------
    0.658

3. Borrow, if necessary:

In this case, there is no need to borrow.

Therefore, the difference between 5.63 and 4.972 is 0.658.