Question

Bài 1: Thực hiện phép tính

a) 22.85 + 15.22 - 20200

b) 50 + [65 - (9 - 4)2]

c) (39 - 19) : (-2) + (34 - 22).5

d) 123.456 + 456.321 – 256.444

giúp mình vs☺

Answer 1

a) 22.85 + 15.22 - 20200

= 22. (85+15) - 20200

= 22.100 - 20200

= 2200 - 20200

= -18000

b) 50 + [65 - (9 - 4)2]

= 50 + [65 - 5.2] =50 + [65 - 10] = 50 + 55 = 105

c) (39 - 19) : (-2) + (34 - 22).5

= 20: (-2) + 12 .5

= -10 + 60 = 50

d) 123.456 + 456.321 – 256.444

= 456. (123 + 321) - 444.256

= 444.456 - 444. 256

= 444. (456 - 256)

= 444. 200 = 88800