900
(((800 plus 400) plus 400) plus 500) plus 500 = 2600
400 + 500 = 900
100 + 400 = 500
287 + 491 + 200 + 500 + 300 + 500 + 280 + 400 + 290 + 490 = 3738
1,500
900
Yes.
6300
4,700.
it will be (30*300/100)-(40*400/100)+(50*500/100)=500. hope it will help.
500 - 5x = 100 500 = 100 + 5x 400 = 5x x = 80 Check it. -400 + 500 = 100 It checks.
400/500 = 400 ÷ 500 = 0.8