300 and 10
300 x 7 = 2100
Estimate: 12 -5 = 7 Actual: 12.35 -4.785 = 7.565
factors: 1, 7, 17, 119, 289, 2023prime factors: 7, 17, 17
The number 2023 is composite, can be divided by 289 and 7.
63
The estimate for the product of 289 and 7 is 2,000.
300 x 7 = 2100
300 and 10
289 x 7 = 2023.
17 x 17 = 289
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.
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.
609.
5,200
7x87 is about 7x90, which equals 630
0.0242
Bench 7/7=1 140/7*5/7 700/7 the Answer is then:100