Question

1. 2 - (-73) =
2. 39 + (-20.4)
3. 67.086 - (-20)
​

Answer 1

Answer:

-2(-73) = -75

39+(-20.4)=18.6

67.086-(-20)=87.086

Answer 2

Given data,

$1. 2 - (-73) =?$

$2. 39 + (-20.4)=?$

$3. 67.086 - (-20)=?$

Here we have to add or subtract the given numbers accordingly to the symbol given.

Also we have some mathematical operations which are used to calculate the above given expressions.

The mathematical operations are given below,

$1)(+)\times(-)=(-)\\2)(-)\times(+)=(-)\\3)(-)\times(-)=(+)\\4)(+)\times(+)=(+)$

$1) 2 - (-73)$

By using third mathematical operation

$2+73$

$75$

$2) 39 + (-20.4)$

By using first mathematical operation

$39-20.4$

$18.6$

$3)67.086 - (-20)$

By using third mathematical operation

$67.086 +20$

$87.086$

Therefore, the final answers are $75$, $18.6$ and $87.086$