Question

Answer 1

Câu mấy

Answer 2

Bài 1 : a) A = { 0,6,12,18,24} ; B = {1,2,3,4,5,6}

b) C = {6}

c) D = { 1,2,3,5}

Bài 2 : a) 47 + 53 + 319 - 19

= (47+53) + (319 - 19)

= 100 + 300

= 400

b) 5.28 - 8

= 140 - 8

= 132

c) 37 . 6² + 37 . 8²

= 37 . 36 + 37 . 64

= 37.(36 + 64)

= 37 . 100

= 3700

d) 125 - 60 : [12 + 2021⁰ . (46 - 44)³ ]

= 125 - 60 : [ 12 + 1 . 2³ ]

= 125 - 60 : [ 12 + 1.8]

= 125 - 60 : [ 12 + 8 ]

= 125 - 60 : 20

= 125 - 3

= 122

Bài 3 : 

a) x - 12 = 38

x = 38 + 12

x = 50

b) 8x + 7 = 103

8x = 103 - 7

8x = 96

x = 96 : 8

x = 12

c)24 : x = 3⁷ : 3⁶

24 : x = 3^7-6

24 : x = 3

x = 24 : 3

x = 8