Question

1). (7-2,5)•(3,25+3,35):(10-9,73) 2) (81,8+18,1):(4-0,67)•(0,97+0,28) 3). (90-2,5)•(2,66-0,06):(1,075+10,3)

Answer 1

1, (7-2,5)•(3,25+3,35) : (10-9,73) = 4,5•6,6 / 0,27 = 110

2,  (81,8+18,1) : (4-0,67)•(0,97+0,28) = 99,9 / 3,33•1,25 = 37,5

3, (90-2,5) •(2,66-0,06) : (10,75+10,3) = (87,5 •2,66-0,06) / 21,05 =

232,69 / 21,05 ≈11,05

Столбиком не получилось :(

Answer 2

Let's solve each of these mathematical expressions step by step:

1. (7 - 2.5) • (3.25 + 3.35) / (10 - 9.73)

First, calculate the values inside the parentheses:

(7 - 2.5) = 4.5 (3.25 + 3.35) = 6.6 (10 - 9.73) = 0.27

Now, divide 4.5 by 0.27:

4.5 / 0.27 = 16.6666667 (rounded to 7 decimal places)

So, the result of the first expression is approximately 16.6666667.

2. (81.8 + 18.1) / (4 - 0.67) • (0.97 + 0.28)

First, calculate the values inside the parentheses:

(81.8 + 18.1) = 99.9 (4 - 0.67) = 3.33 (0.97 + 0.28) = 1.25

Now, divide 99.9 by 3.33 and then multiply the result by 1.25:

(99.9 / 3.33) * 1.25 = 29.9979998

So, the result of the second expression is approximately 29.9979998.

3. (90 - 2.5) • (2.66 - 0.06) / (1.075 + 10.3)

First, calculate the values inside the parentheses:

(90 - 2.5) = 87.5 (2.66 - 0.06) = 2.6 (1.075 + 10.3) = 11.375

Now, divide 87.5 by 11.375:

87.5 / 11.375 = 7.69230769 (rounded to 8 decimal places)

So, the result of the third expression is approximately 7.69230769.