Question

Помогите пожалуйста)).по действием а) 31,25+2 1\12-1\3 ------------------------- 7,3-0,4*8,5 Б) 12*0,8-1,8 ----------------- 2 1/12+ 2 1/15-0,25

Answer 1

Это дробь или знак деления?

Answer 2

Calculation A

To solve the expression 31.25 + 2 + 1/12 - 1/3, we can follow the order of operations (PEMDAS/BODMAS) and perform the calculations step by step.

1. Add 31.25 and 2: 31.25 + 2 = 33.25 2. Convert 1/12 and 1/3 to a common denominator: 1/12 = 0.0833... and 1/3 = 0.3333... 3. Subtract 0.0833... from 0.3333...: 0.3333... - 0.0833... = 0.25

Therefore, the value of expression A is 33.25 + 0.25 = 33.5.

Calculation B

To solve the expression 12 * 0.8 - 1.8, we can perform the multiplication and subtraction step by step.

1. Multiply 12 and 0.8: 12 * 0.8 = 9.6 2. Subtract 1.8 from 9.6: 9.6 - 1.8 = 7.8

Therefore, the value of expression B is 7.8.

Calculation C

To solve the expression 2 + 1/12 + 2 + 1/15 - 0.25, we can follow the order of operations and perform the calculations step by step.

1. Add 2 and 2: 2 + 2 = 4 2. Convert 1/12 and 1/15 to a common denominator: 1/12 = 0.0833... and 1/15 = 0.0666... 3. Add 0.0833... and 0.0666...: 0.0833... + 0.0666... = 0.1499... 4. Subtract 0.25 from 0.1499...: 0.1499... - 0.25 = -0.1001...

Therefore, the value of expression C is 4 + (-0.1001...) = 3.8998....

Please note that the values provided are approximate due to the decimal representation.

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