Question

1)1/3*3,6-1 2)0,24:2/3+2 3)(1/7+1/8):5/28 4)1/1/5-1/30 5)5/2-2,5-(-3/5)

Answer 1

1)1/3*3,6-1 =1.2-1=0.2
2)0,24:2/3+2=0.04+2=2.04

Answer 2

Sure! Let's break down each of the expressions step by step:

1) 1/3 * 3.6 - 1

First, let's simplify the multiplication: 1/3 * 3.6 = 0.3 * 3.6 = 1.08

Now, let's subtract 1: 1.08 - 1 = 0.08

So, the answer to this expression is 0.08.

2) 0.24 : 2/3 + 2

To solve this expression, let's start with the division: 0.24 : 2/3 = 0.24 * 3/2 = 0.36

Next, let's add 2: 0.36 + 2 = 2.36

Therefore, the answer to this expression is 2.36.

3) (1/7 + 1/8) : 5/28

First, let's simplify the addition within the parentheses: 1/7 + 1/8 = (8/56 + 7/56) = 15/56

Now, let's solve the division: 15/56 : 5/28 = 15/56 * 28/5 = 3/2

So, the answer to this expression is 3/2, which is equivalent to 1.5.

4) 1/1/5 - 1/30

To solve this expression, we need to clarify the order of operations. In this case, the division should be done first: 1/1/5 = 1 / (1/5) = 1 * 5 = 5

Now, let's subtract 1/30: 5 - 1/30 = 5 - 1/30 = 149/30

Therefore, the answer to this expression is 149/30.

5) 5/2 - 2.5 - (-3/5)

Let's rewrite the subtraction of a negative fraction as addition: 5/2 - 2.5 + 3/5

Now, let's find a common denominator for the fractions: 5/2 = 25/10 3/5 = 6/10

The expression becomes: 25/10 - 2.5 + 6/10

Now, let's simplify the subtraction and addition: 25/10 - 2.5 + 6/10 = 25/10 - 25/10 + 6/10 = 6/10

So, the answer to this expression is 6/10, which is equivalent to 3/5.

I hope this helps clarify the calculations for each of the expressions! Let me know if you have any further questions.