= 2300 – 140 = 2160 B 300

Câu 1

= 2300 – 140 = 2160

b 300 : 4 + 300 : 6 – 25 = 75 + 50 -25 = 100 0,75

0,75

c 276 : [ 110 – ( 17 – 9 )

2

] – 2021

0

= 276 : (110 – 64) – 1

= 276 : 46 – 1

= 5

d 6

20

: (6

15

.25 + 6

15

.11) = 6

20

: 6

17

= 6

3

= 216 0,75