Use properties and mental math to solve. 7.35+ 1.47+ 9.65=

Hello mate!

We have the equation 7.35+ 1.47+ 9.65

We can see that 35 + 65 = 100, so we could do this:

7.35+ 1.47+ 9.65 = (7.35+ 9.65) + 1.47 = (7 + 0.35+ 9 + 0.65) + 1.47 = (7 + 9 + (0.35 + 0.65)) + 1.47 = (7 + 9 + 1) + 1.47 = 17 + 1.47 = 18.47

Is always useful to look for numbers that "fit" and add them first.

With "fit" i mean that the numbers add to 1, 10 or something that is easier to handle.

3

step-by-step explanation:

irrational, then, just means all the numbers that aren't rational. every integer is a rational number, since each integer n can be written in the form n/1. however, numbers like 1/2, 45454737/2424242, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers.

step-by-step explanation: