Your brain, of course.
It depends on your computational skills.
Break it up into two separate problems. First 4X25=100, which is easy enough. Then 27X100=2700.
The term that describes numbers that are easy to compute mentally is "round numbers." Round numbers are whole numbers that end in zero or five, making them simpler to work with in mental calculations. These numbers are often used in estimation and quick arithmetic tasks due to their ease of manipulation.
dont know about associative property but this one is easy in your head. 4x25=100x27=2700
No, but if you practice you can learn to do it and it gets easier. Start of by learning (by rote) your times tables and when adding up do so in 10s.
benchmark numbers
It depends on your computational skills.
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.
Break it up into two separate problems. First 4X25=100, which is easy enough. Then 27X100=2700.
The term that describes numbers that are easy to compute mentally is "round numbers." Round numbers are whole numbers that end in zero or five, making them simpler to work with in mental calculations. These numbers are often used in estimation and quick arithmetic tasks due to their ease of manipulation.
dont know about associative property but this one is easy in your head. 4x25=100x27=2700
Compatible Numbers numbers that are easy to compute mentally are called
No, but if you practice you can learn to do it and it gets easier. Start of by learning (by rote) your times tables and when adding up do so in 10s.
easy to divide mentally
partial qoutient division is an easy way to do division
easy well not really
Compatible numbers can easily be divided mentally.