Presently a general computerization and high technologies it is impossible to do without good knowledge of mathematics. Representatives of many professions need ability to consider, to think, find logical and rational solutions of tasks. The foundation of understanding of mathematics is laid even during training at school. The modern school student with the solution of a set of mathematical tasks, equations or examples is helped by the developed order or an algorithm of performance of actions.
Instruction
1. Attentively consider mathematical example:8.9×6+2×(62+28)-19.2:8 brought to your attention
2. Define an order of performance of actions, being guided by the following rule - if expression contains actions of the first step (addition and/or subtraction) and the second (multiplication and/or division) and in it there are brackets as in your case, then at first perform operations in brackets, and then actions of the second step, that is find value of expression: 62+28=90
3. Follow an order of performance of actions, calculate value of expression: 8.9×6Для it find the work of decimal fraction 8.9 on natural number 6. Do not pay attention to a comma, and then in the received work separate a comma on the right so many figures how many they are separated by a comma in decimal fraction. Thus, receive 53.4.
4. Further, following an operations procedure, calculate value of expression: 19.2:8dlya it divide decimal fraction 19.2 into natural number 8. Do not pay attention to a comma, put in private a comma when division of the whole part comes to an end. You remember if the whole part is less divider, then private has to start from scratch. Thus, receive 2.4
5. Increase the sum 90 received when performing actions in brackets by 2, receive 180.
6. Perform operations of the first step one after another from left to right, find 53.4+180-2.4. So, the value of expression is equal to 231.