150 - 4000 - 600 = -4450
The estimate is 3 divided by 3 equals 1, but the actual answer will be less than that. Estimate 0.8
quick way to estimate a 10 percent tip is to remove the ones digit.Example: to give 10% tip for 50 = 510% tip for 500 = 50
500/10 = 50
The first digit is 1, in the tens place. So the front end estimate is 10.
10 times 351 = 3510 The real answer will be 351 more than that. Estimate 3861
arithmetic
For the most accurate answer do add these sums together 200 x 900 40 x 70 (then we round the units to the nearest 5) 10 x 5 Estimate = (200x900)+(40x70)+(10x5)= whatever you work it out to be
11
You can get 2, 4, 6, 8, 10, and 12, six even sums all together.
Well, 1 is equal to 1. 9 is equal to 9. So any number from 0 to 9. I do not think this is what is meant by the question. If you mean any number with more than one digit. There is no such number. Because 11 sums to 2. 19 sums to 10. 21 sums to 3. 29 sums to 11. 111 sums 3. 119 sums to 11. The sums do not grow as fast the increase of digits.
A regular polygon with 10 sides is called a decagon. The formula of angle sums of a polygon is: Angle Sums = (n - 2)180° where n = number of sides. So, Angle Sums = (10 - 2)180° = 8 x 180° = 1,440°
Oh honey, you've got a lot of sums to tackle in class 10 math. You'll be swimming in a sea of equations and formulas, so get ready to dive in. Practice makes perfect, so the more sums you do, the better you'll get. Just keep at it, you've got this!
Once can roughly round to tens if the numbers are less than 1000, or to hundreds if the numbers are less than 10000, etc., trying to make up for large round-off errors which occur when the number are close to 1/2 the round-off amount. E.G Add: 13+ 57+ 49 + 45 + 78 + 105 Add 10 + 60 +50 + 50 + 80 + 100
The pairs of positive integer factors of 80 are: 1 x 80 = 80 2 x 40 = 80 4 x 20 = 80 5 x 16 = 80 8 x 10 = 80 Since multiplication sums are commutative, the reverses of the sums also hold true. For example, such that 8 x 10 = 80, also 10 x 8 = 80, and so on.
910
There is no reason to estimate: 4000 + 10 = 4010.
Estimate that to be 10.