Tính: a) 110 – 7^2 + 22 : 2 b) 9 . (8^2 – 15); c) 5 . 8 – ( 17 + 8 ) :5 d) 75 : 3 + 6 . 9^2;
Giải thích
a) 110 – 72 + 22:2 = 110 – 49 + 11 = 61 + 11 = 72;
b) 9.(82 – 15) = 9.(64 – 15 ) = 9.49 = 441;
c) 5.8 – (17 + 8):5 = 40 – 25:5 = 40 – 5 = 35;
d) 75:3 + 6.92 = 25 + 6.81 = 25 + 486 = 511