How is making a ten to add the same as making a ten to subtract? How is it different?

when adding a ten the number goes higher but when subtracting ten the number is lower than the original number  

Step-by-step explanation:

for example :

20+10= 30 ( its greater )

90-10=80( is lower )

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

answer: do we write it

step-by-step explanation: