300 and 10
The estimate for the product of 289 and 7 is 2,000.
300 x 7 = 2100
You can add 289 and 7 together without estimating. you can add 2, 8, 9 and 7 together without estimating. If you have to, 290 and 7 = 297.
can you tell the right thing
0.0242
289 x 7 = 2023.
17 x 17 = 289
Estimate: 12 -5 = 7 Actual: 12.35 -4.785 = 7.565
The best estimate is, obviously, the exact answer which is 671898.4556 : anything else is less than best.A respectable estimate is 4000*175 = 4000*(7/4)*100 = 1000*(7)*100 = 700000.
7 milliliters
1, 7, 17, 119, 289, 2023.
77 = 823,543 823,5437 = 256923577521058878088611477224235621321607 2569235775210588780886114772242356213216077 = 7.3897156067403508131992561964010797488623510811 × 10^289