8.9 x 10^18 x 78 = 694.2 x 10^18 = 694200000000000000000
-10
10% off $18 = $18 - ( 0.1 x $18) = $16.2
28-18=10 or 18-28= -10
Prime factorization:10 = 2 x 518 = 2 x 3245 = 5 x 322 x 5 x 32 = 90 (the LCM of 10, 18, and 45)
x + 10 = 18 18 - 10 = x 18 -10 = 8 x = 8
-10 x -9 = 90 90 - 18 = 72
It means that your answer has to be times by ten, for example if i had: 6 x 3 = 18 an approximate would be : 6 x 3 = 18 but 18 x 10 18 x 10 = 180
8.9 x 10^18 x 78 = 694.2 x 10^18 = 694200000000000000000
-10
18 x 1 = 18 18 x 2 = 36 18 x 3 = 54 18 x 4 = 72 18 x 5 = 90 18 x 6 = 108 18 x 7 = 126 18 x 8 = 144 18 x 9 = 162 18 x 10 = 180 18 x 11 = 198 18 x 12 = 216
10' x 18' = 180 square feet.
yes 1/10 x 18 = 18/10 = 1.8
18 x 10-3 meters = 18 millimetersThat's 0.000018 kilometers, or about 0.7 inch
10% off $18 = $18 - ( 0.1 x $18) = $16.2
Since 18 is greater than 10, 1 would be enough.
18