Question

Tính nhanh:

a/  8,19x12+1,81x12

b/  81:9,16-81:9,15

Answer 1

a/  8,19x12+1,81x12

=12*(8,19+1,81)

=12*10

=120

b/  81:9,16-81:9,15

=81:(9,16-9,15)

=81:0,01

=8100

Answer 2

a.120

b.80,99

Answer 3

a ) 8,19 *12+1,81*12

= 12 *(   8,19+1,81 ) 

= 12*10

=120

b ) 81: 9,16-81: 9,15 

= 81 : ( 9,16-9,15 )

= 81 : 0,01

=8100