Instruction
1
Carefully consider the proposed mathematical example:
8,9×6+2×(62+28)-19,2:8
8,9×6+2×(62+28)-19,2:8
2
Define a procedure, based on the following rule - if the expression contains an action of the first stage (the addition and / or subtraction) and the second ( multiplication and / or division) and parentheses, as in your case, first follow the steps in parentheses, and then the second step, i.e. find the value of the expression:
62+28=90
62+28=90
3
Follow the procedure, calculate the value of the expression:
8,9×6
To do this, find the product of decimal fractions 8,9 on the natural number 6. Do not pay attention to the comma, and then the resulting product will separate with a comma on the right as many digits as they are separated by comma in decimal fractions. Therefore, get a reading of 53.4.
8,9×6
To do this, find the product of decimal fractions 8,9 on the natural number 6. Do not pay attention to the comma, and then the resulting product will separate with a comma on the right as many digits as they are separated by comma in decimal fractions. Therefore, get a reading of 53.4.
4
Further, following the course of action, compute the value of the expression:
19,2:8
To do this, divide the decimal fraction of 19.2 to a natural number 8. Do not pay attention to the comma, put a comma in private when it will end the division of the integer part. Remember, if the integer part is less than the divisor, the quotient must begin from scratch. Thus, get the 2.4
19,2:8
To do this, divide the decimal fraction of 19.2 to a natural number 8. Do not pay attention to the comma, put a comma in private when it will end the division of the integer part. Remember, if the integer part is less than the divisor, the quotient must begin from scratch. Thus, get the 2.4
5
The amount of 90 obtained in the action in brackets, multiply by 2, we get 180.
6
Follow the steps of the first stage from left to right, calculate 53,4+180-2,4. So, the value of the expression is equal to 231.
