Question

11. Study the pattern in the following additions 1+ 2+ 3+ 4+ = 15 2+ 3+ 4+ 5+ 6 = 20 3+4+5+6+7= 25 Find the following sums using the pattern. 04+ 5+ 6+ 7+8 @ 77 78 79 80 +81 ​

Answer 1

Answer:

The answer is 30.

Step-by-step explanation:

1+2+3+4 = 15

2+3+4+5 = 20

3+4+5+6 = 25

4+5+6+7 = 30.

Answer 2

Answer:

1. 30, 395

Step-by-step explanation:

04+5+6+7+8, we add the 77 78 79 80 after add the answer is 314 and we add 314+81=395

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