Question

Thực hiện các phép tính sau: a) 18 : 32+ 5.23 b) (–12) + 42 c) 25 + 53 .75–200

Answer 1

a 18 : 32+ 5.23 = 18 : 9 + 5 . 8 = 2 + 40 = 420.50,25 b (–12) + 42 = 42–12 = 300,5 c53.25 + 53 .75–200 = 53. ( 25 + 75)–200 = 53 . 100–200 = 5300–200 = 5100

Answer 2

a, 18 : 32+ 5.23 = 18 : 9 + 5 . 8 = 2 + 40 = 42 b, (–12) + 42 = 42–12 = 30 c, 53.25 + 53 .75–200 = 53. ( 25 + 75)–200 = 53 . 100–200 = 5300–200 = 5100