Question

3) 8 3/40 + 12 11/20 + 6 7/80 4) 5 7/20 + 20 4/15 + 12 11/60

Answer 1

Ответ:26 57/80

37 48/60

Пошаговое объяснение:

3) 8 3/40 + 12 11/20 + 6 7/80 = 323/40 + 251/20 + 487/80 = 646/80+1004/80+487/80=2137/80=26 57/80

4) 5 7/20 + 20 4/15 + 12 11/60 = 107/20 + 304/15 + 731/60 = 321/60+1216/60+731/60 = 2268/60 = 37 48/60

Answer 2

To simplify the given expressions, we'll add the whole numbers and fractions separately. Let's start with the first expression:

3. 8 3/40 + 12 11/20 + 6 7/80

Step 1: Add the whole numbers: 8 + 12 + 6 = 26

Step 2: Add the fractions separately: For fractions, we need to find a common denominator. In this case, the common denominator is 80. Let's convert each fraction:

8 3/40 = (8 * 80)/40 + 3/40 = 320/40 + 3/40 = 323/40 12 11/20 = (12 * 80)/20 + 11/20 = 960/20 + 11/20 = 971/20 6 7/80 = (6 * 80)/80 + 7/80 = 480/80 + 7/80 = 487/80

Step 3: Add the converted fractions: 323/40 + 971/20 + 487/80

To add these fractions, we need to have a common denominator, which is 80. Now, let's add them:

323/40 + 971/20 + 487/80 = (323 * 2)/80 + (971 * 4)/80 + 487/80 = 646/80 + 3884/80 + 487/80 = (646 + 3884 + 487)/80 = 5017/80

Now, we can write the final answer for expression 3:

8 3/40 + 12 11/20 + 6 7/80 = 26 + 5017/80

We can also simplify the fraction 5017/80 further if required.

Now, let's move on to the second expression:

4. 5 7/20 + 20 4/15 + 12 11/60

Step 1: Add the whole numbers: 5 + 20 + 12 = 37

Step 2: Add the fractions separately: For fractions, we need to find a common denominator. In this case, the common denominator is 60. Let's convert each fraction:

5 7/20 = (5 * 60)/20 + 7/20 = 300/20 + 7/20 = 307/20 20 4/15 = (20 * 60)/15 + 4/15 = 1200/15 + 4/15 = 1204/15 12 11/60 = (12 * 60)/60 + 11/60 = 720/60 + 11/60 = 731/60

Step 3: Add the converted fractions: 307/20 + 1204/15 + 731/60

To add these fractions, we need to have a common denominator, which is 60. Now, let's add them:

307/20 + 1204/15 + 731/60 = (307 * 3)/60 + (1204 * 4)/60 + 731/60 = 921/60 + 4816/60 + 731/60 = (921 + 4816 + 731)/60 = 6468/60

Now, we can write the final answer for expression 4:

5 7/20 + 20 4/15 + 12 11/60 = 37 + 6468/60

We can simplify the fraction 6468/60 further if required.