how to do sum and product for huge no easily
Answers
Answer:
yrrr their is no option you have to solve it
Answer:
Tip #1: Find Pairs of Numbers that Add to 10
Here is perhaps the single most useful quick and dirty tip to help you calculate quickly: When adding a list of numbers, look for pairs of numbers that add to ten. Here’s what I mean:
1 + 9,
2 + 8,
3 + 7,
4 + 6,
5 + 5.
All of those pairs add to ten.
So, when you’re adding groups of numbers, look for these special pairs. If you’ve got one or more pairs, it’s easy to add them up—as easy as 10 + 10 = 20.
How to Double and Halve to Multiply Fast
The previous trick is really just a special case of today's fifth and final (and I think coolest) trick that you can use whenever one of the numbers you're multiplying is even. Let's say you're multiplying 47 x 24. Since 24 is an even number, let's use the idea of doubling and halving to solve this problem quickly.
What do I mean by doubling and halving? Well, the trick is to continually double one number while halving the other. In this case, this means that we turn the problem 47 x 24 into the problem 94 x 12 by simultaneously doubling 47 and halving 24. We can then do the same thing and turn the problem into 188 x 6, and again to get 376 x 3. At this point, we can't double and halve any further, so we just have to do the remaining—much easier!—multiplication problem to find that 47 x 24 = 376 x 3 = 1,128.