5 Σ (10)^k-1 K=1 I recently had to do this problem. Pain in the a** if you ask me but I solved it for you, so it's okay :D
Using a pen or a keyboard
500 + 500 is equal to 1,000
1000+40=1040 1040+1000=2040 2040+30=2070 2070+1000=3070 3070+20=3090 3090+1000=4000 4000+10=4100
When adding, the order does not matter. It's called the summation property.
10001
1000 plus 10000 equals 11000
5000 + 8250 + 100 + 1000 + 6500 + 1000 + 6500 + 1500 + 1500 + 10000 + 1000 + 10000 + 100 + 8250 + 5000 + 5000 + 8250 = 78,950
4Σ (12 - 4i)i=0
Using a pen or a keyboard
It is not clear whether the question is 3a + 4a + 5a + 6a^3 which would be 12a + 6a^3 or 3a + 4a + 5a + (6a)^3 = 12a + 216a^3 or (3a + 4a + 5a + 6a)^3 = 5832*a^3 But none of these really require summation notation!
500 + 500 is equal to 1,000
15729=10000+5000+700+20+9 or the highest digit plus next highest plus nexthighest and so on
Hit the Math button (Right under ALPHA) and it should already be on the MATH tab. go down to summation ∑( and you're set!
42003 + 10000 = 52003
25 + 10000 = 10025.
40000 + 10000 = 50000
Yes of course. Order does not affect summation's result.