3 years ago

The sum of all the 2 digit numbers is .. plz give explanation too

1 answer:

saw5 [17]3 years ago

3 0

Answer:

4905

Step-by-step explanation:

$Sn= \frac{(a_1+a_n)}{2}*n\\\\Sn = \frac{10+99}{2}*90 = 4905$

You might be interested in

sdas [7]

Answer:

Step-by-step explanation:

Vanilla ice cream = 3/5 x 25 = 15

Remaining = 25 - 15 = 10

Mint ice cream = 1/2 x 10 = 5

Remainder = 10 - 5 = 5 = vanilla

7 0

3 years ago

Goshia [24]

Answer:

My answer would be y=2x+1

Step-by-step explanation:

7 0

2 years ago

enot [183]

Answer:

Step-by-step explanation:

It c just took the test

7 0

3 years ago

Yuri [45]

Answer:

Step-by-step explanation:

5 0

3 years ago

julia-pushkina [17]

Step-by-step explanation:

I'm not sure what you mean by 'written method' but the sum is 2,654.

6 0

3 years ago

The sum of all the 2 digit numbers is .. plz give explanation too​