What is sum of numbers 1 2 3 4 5 6 99 100=

It's 5050

Step-by-step explanation:

So to able to find the answer to that, you add 1 and 100 together which is 101,

Next you multiply 101 by the middle number which is 50:

101x50= 5050

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Another example:

1+2+3+4+5+6+7...2536+2538

Ok so we first do 1+2538 which is 2538, and then the middle number is 1269, next we do 2538x1269=3220722 so  1+2+3+4+5+6+7...2536+2538= 3220722

HOPE THIS HELPS :D

1d

2b

3 false

4 d

5 3200sq,ft

80+60+y=180

then divide the difference between 60 and y and add it to 180

so x =180 +( (y-60)/2)

x equals 200

step-by-step explanation:

8

b.-4 units

all you   do is count how many times you move