250 million x 10 = 2,500,000,000
Any number multiplied by 250 will be increase by 250. 1 x 250 = 250 2 x 250 = 500 3 x 250 = 750 and so on.
2.5 x 108 or 250 million
1 + 2 + ... + 250 = 31375 1 + 2 + ... + 250 = 1/2 (1 + 2 + ... + 250 + 250 + 249 + ... + 1) = 1/2 ((1 + 250) + (2 + 249) + ... + (250 + 1)) = 1/2 (251 + 251 + ... + 251) = 1/2 x 250 x 251 = 31375
3/10 x 250/1 = 3/1 x 25/1 = 3 x 25 = 75
250 million x 10 = 2,500,000,000
250 million is 250,000,000 Hence 2.5 x 10^(8).
1 x 250, 2 x 125, 5 x 50, 10 x 25, 25 x 10, 50 x 5, 125 x 2, 250 x 1 = 250
250 = 1 x 250, 2 x 125, 5 x 50, 10 x 25
Any number multiplied by 250 will be increase by 250. 1 x 250 = 250 2 x 250 = 500 3 x 250 = 750 and so on.
1 x 250 = 250 2 x 250 = 500 3 x 250 = 750 4 x 250 = 1000 5 x 250 = 1250 6 x 250 = 1500 7 x 250 = 1750 8 x 250 = 2000 9 x 250 = 2250 10 x 250 = 2500 11 x 250 = 2750 12 x 250 = 3000 ...
2.5 x 108 or 250 million
1 x 250, 2 x 125, 5 x 50, 10 x 25 = 250
1 + 2 + ... + 250 = 31375 1 + 2 + ... + 250 = 1/2 (1 + 2 + ... + 250 + 250 + 249 + ... + 1) = 1/2 ((1 + 250) + (2 + 249) + ... + (250 + 1)) = 1/2 (251 + 251 + ... + 251) = 1/2 x 250 x 251 = 31375
Let the required fraction be x 1 km = 1000m x of 1000m=250 1000x = 250 x = 250/1000 x=1/4 Hence, 1/4 of 1 km is 250m.
3/10 x 250/1 = 3/1 x 25/1 = 3 x 25 = 75
1 x 250, 2 x 125, 5 x 50, 10 x 25 = 250