To do a quick estimate in your head, the idea is to round each number to the nearest multiple of 10, in this case (i.e., to one significant figure). 34 is closer to 30 than to any other multiple of 10; 59 is closest to 60. It should now be easy to add 30 + 60 in your head.
To do a quick estimate in your head, the idea is to round each number to the nearest multiple of 10, in this case (i.e., to one significant figure). 34 is closer to 30 than to any other multiple of 10; 59 is closest to 60. It should now be easy to add 30 + 60 in your head.
To do a quick estimate in your head, the idea is to round each number to the nearest multiple of 10, in this case (i.e., to one significant figure). 34 is closer to 30 than to any other multiple of 10; 59 is closest to 60. It should now be easy to add 30 + 60 in your head.
To do a quick estimate in your head, the idea is to round each number to the nearest multiple of 10, in this case (i.e., to one significant figure). 34 is closer to 30 than to any other multiple of 10; 59 is closest to 60. It should now be easy to add 30 + 60 in your head.
300+60=360
2048
4+1=5. Plus 4 equals 9. Plus 77685769844446473 equals 77685769844446482. Plus 3 equals 77685769844446485. Plus 8 equals 77685769844446493. Plus 1 equals 77685769844446494. Plus 9870998342523322424 equals 1064785604097768918. Plus 4 equals 1064785604097768922.
It is the property that equals plus equals are equals.
the answer is a
439 + 71 = 510
You don't need to estimate - it is an easy enough sum: 136.
100 That is an estimate.
439 + 71 = 439 + 1 + 70 = 440 + 70 = 510. Who needs a ball park estimate when the exact answer is just as easy to find?
500 + 930 = 1430 But why do you need a ball park figure when the exact figure is so very easy to get? 1432
That equals 559. If you have to, estimate 210 + 350 = 560
nothing at all
If 8.81 + 2.78 = 8.8 plus Xthen, since 8.81 is nearly equal to 8.8 a good estimate for X is 2.78.
300+60=360
That equals 16.7 which would be between 15 and 18.
2048
42