Break it up into two separate problems. First 4X25=100, which is easy enough. Then 27X100=2700.
the property which states that for all real numbers a,b,and c their product is always the same, regardless of their grouping
4*25 = 100 So 4*25*27 = (4*25)*27 = 100*27 = 2700
No.
It depends on your computational skills.
Your brain, of course.
the property which states that for all real numbers a,b,and c their product is always the same, regardless of their grouping
4*25 = 100 So 4*25*27 = (4*25)*27 = 100*27 = 2700
No.
benchmark numbers
Your brain, of course.
It depends on your computational skills.
compatible numbers
if you mean multiplication then 4x25=100 x 27 = 270
Compatible Numbers numbers that are easy to compute mentally are called
The patterns and properties to compute mentally 120 times 30 is the numbers 12 and 3 plus the two 0. Multiply 12 by 3 (36) and add the two 0 (3600).
There are many ways to do it. Have a look at the Wikipedia article (check the link).
Numbers like 10, 25, 50, and 100 are easy to compute mentally because they have simple multiples or divisions that are easy to work with. For example, doubling 25 is 50, or dividing 100 by 10 gives you 10. These numbers are often used as benchmarks in mental math calculations.