giúp mình vs mn , mình cảm ơn nhiều a) 18.115 – 18.95 b) [12020 + (12 – 9 )2 ] : 5 c) [312.23 + 30.(315: 33)] : 310

Đáp án:

a) 18.115 – 18.95 = 18.(115-95) = 18.20 =360

b) [12020 + (12 – 9 )2 ] : 5 = (12020 + 6) : 5 = 12026 : 5 =2405,2

c) [312.23 + 30.(315: 33)] : 310 = (7176 + 286,36) : 310 = 7462,36 : 310= 24,07

@trannamguitarist

`a) 18.115 – 18.95`

`=(115-95).18`

`=20.18`

`=360`

`b) [12020 + (12 – 9 )2 ]:5`

`=[12020+3.2]:5`

`=[12020+6]:5`

`=12026:5`

`=2405,2`

`c) [312.23 + 30.(315: 33)] : 310`

`=[312.23+30.9,54]:310`

`=[7176+286,2]:310`

`=7462,2:310`

`=24,0716129`

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