a)
A = 37 . 173 + 62 . 173 + 173
= 37 . 173 + 62 . 173 + 173 . 1
= 173 . (37 + 62 + 1)
= 173 . 100
= 17 300
b)
B = 72 . 99 + 28 . 99 – 900
= 99 . (72 + 28) – 900
= 99 . 100 – 900
= 9 900 – 900
= 9 000
c)
C = 23 . 3 – (110 + 15) : 42
= 8 . 3 – (1 + 15) : 16
= 24 – 16 : 16
= 24 – 1
= 23
d)
D = 62 : 4 . 3 + 2 . 52 – 2010
= 36 : 4 . 3 + 2 . 25 – 1
= 9 . 3 + 50 – 1
= 27 + 50 – 1
= 77 – 1
= 76