Question

a) b) c) d) By how much is 78 greater than-12? By how much is -23 less than 23? What must be added to -6 to give 105? What must be added to 15 to give -30?​

Answer 1

a) 90

b) 46

c) 111

d) -45

Explanation:

78 is greater than -12 by 90 (78 + (-12) = 66)

-23 is less than 23 by 46 (23 + (-23) = 0)

To give 105, 111 must be added to -6 (105 + (-6) = 99)

To give -30, -45 must be added to 15 (-30 + 15 = -15)