You can solve this a couple different ways:
1. You can estimate that 823 is close to 800 and 680 is close to 700. Multiplying these gives you: 800 x 700 = 560,000
2. You can estimate that 823 is close to 825 and 680 is close to 675. Multiplying these gives you: 825 x 675 = 556,875
Remember that estimating does not mean you are supposed to get the actual answer (which in this case is 559,640)--you are just trying to be close. The first estimate above could be done in your head (if you remember that 8 x 7 is 56 and then just add the zeros).
823
when both factors in a multiplication problem are rounded up to estimate the product, the estimate is an overestimate.
680 X 1/8 = 680/8 = 85
Explain how you know whether an estimate of a product is an overestimate or an underestimate?
The same as 10 sixtyeights; 680
823 multiplied by 680 is 559,640.
To the nearest ten, 680
680 + 440 = 1120
The product is: 2,244,000
The number 823 is a prime number because its only factors are 1 and itself.The two factors of 823 are 1 and 823.The only factor pair of 823 is 1 x 823.The only prime factor of 823 is 823.The distinct prime factor of 823 is 823.
1, 823.
What is 823 plus 836?823 plus 836 is 1,659.
823
823 = DCCCXXIII
823 is: ochocientos veintitrés.
823 is a prime number.
680