Câu 1.33:
a. A= 32,125- ( 6,325 + 12,125 ) - ( 37 + 13,675 ) = 32,125- 6,325 - 12,125 - 37 - 13,675= (32,125-12,125) - (6,325 +13,675) - 37 = 20 - 20 - 37 = -37
b. B= 4,75 + $\left ( \frac{-1}{2} \right )^{3}$ + $0,5^{2}$ - 3.$\frac{-3}{8}$ = 4,75 + $\frac{-1}{8}$ + $0,5^{2}$ + $\frac{9}{8}$ = 4,75 + $0,5^{2}$ + ($\frac{9}{8}$ + $\frac{-1}{8}$) = 4,75 + 0,25 +1 = 6
c. C= 2021,2345 . 2020,1234 + 2021,2345 .(-2020,1234 ) = 2021,2345 . (2020,1234 -2020,1234 )= 2021,2345 .0 = 0