Question

Simplify the following
1.72-90
2.[-20]-[-40]
3.[-35]-54
4.[-7]+[-8]+[-90]
5.1954+[-2010]+[-1979]

Answer 1

Step-by-step explanation:

Question:

Simplify the following:

i) 72-90

ii) (-20)-(-40)

iii) (-35) – 54

iv) (-7) + (-8) + (-90)

v) 1954 + (-2010) + (-1979)

Answer:

i) 72-90 = -18

ii) (-20)-(-40) = -20 + 40 = 20

iii) (-35) – 54 = -89

iv) (-7) + (-8) + (-90) = -105

v) 1954 + (-2010) + (-1979) = -2035

Answer 2

Answer:

(i) 15 + (−8) = 7

(ii) (−16) + 9 = −7

(iii) (−7) + (−23) = −30

(iv) (−32) + 47 = 15

(v) 53 + (−26) = 27

(vi) (−48) + (−36) = −84