Question

-29/54+(-13/42) -19/60+(-11/24) -35/81+(-25/72) -23/36+(-31/48) (20б)

Answer 1

1) 160/189

2) -31/40

3) -505/648

4)-185/144

Answer 2

It looks like you have provided a series of fractions to be added together. Let's go through the calculations step by step:

1. -29/54 + (-13/42): To add these fractions, you need a common denominator, which is the least common multiple of 54 and 42, which is 378. Convert the fractions to have the common denominator: -29/54 = -203/378 -13/42 = -143/378 Now add them together: -203/378 + (-143/378) = -346/378

2. -19/60 + (-11/24): For this calculation, you can use the common denominator of 60 and 24, which is 120: -19/60 = -38/120 -11/24 = -55/120 Now add them: -38/120 + (-55/120) = -93/120

3. -35/81 + (-25/72): The common denominator for these fractions is the least common multiple of 81 and 72, which is 1296: -35/81 = -560/1296 -25/72 = -450/1296 Add them together: -560/1296 + (-450/1296) = -1010/1296

4. -23/36 + (-31/48): You can use the common denominator of 36 and 48, which is 144: -23/36 = -92/144 -31/48 = -62/144 Add them: -92/144 + (-62/144) = -154/144

Now, you have the results of all the individual calculations. You can simplify these fractions further if needed. For instance, the fraction -154/144 can be simplified by dividing both the numerator and denominator by their greatest common divisor (GCD), which is 2: -154/144 = -77/72

So, the final results of the calculations are: -346/378, -93/120, -1010/1296, and -77/72.