Question

[Nguyễn Đình Minh Tuấn]

Câu 6: Tính giá trị biểu thức:

a, (115+35):15+200x6:8                           

b, 3075x(72:9)–897                                          c,19832:37+19464

d, 135540 : (9x4) + 57800 : 200                                e, 5625 – 5000 : (726 : 6 – 113)

g, abab : ab x 5 + 495 – 100                            h, 325512 : 33 – 7856

Câu 7: Tìm X

a, X x 15 + X x 13 = 560 x 45          b, X x 125 – X x 73 = 1196     c, (X + X x 2) : 34 = 504

246 : X + 34 : X = 5                360 : X – 126 : X = 6              2005 + X x 34 = 5337

58 x X – 934 = 6722               X : 1234 = 127 (dư 360)                   XX – 2X x 2 + 68 = 100

14968 – X x 5 = 4968      (X+2) + (X+2) + (X+2) = 42                     199 < X x 5 – 15< 201

Answer 1

[Trịnh Minh Hiếu]

a) (115 + 35) L 15 + 200 x 6 : 8

= 150 : 15 + 1200 : 8

= 10 + 150

= 160

b) 3075 x (72 : 9) - 897

= 3075 x 8 - 897

= 24600 - 897

= 23703

c) 19832 : 37 + 19464

= 536 + 19464

= 20000

d) 135540 : (9 x 4) + 57800 : 200

= 135540 : 36 + 289

= 3765 + 289

= 4054

e) 5625 - 5000 : (726 : 6  - 113)

= 5625 - 5000 : (121 - 113)

= 5625 - 5000 : 8

= 5625 - 625

= 5000