Question

a,1/2*5/4+1/2*3/4+1/2

b,72/95*64/72*95/72*14/86*72/64*86/14

Tính thuận tiện,đây là *nhân nha

Answer 1

a) `1/2 xx 5/4 + 1/2 xx 3/4 + 1/2`

`=1/2 xx (5/4 + 3/4 + 1)`

`=1/2 xx 3`

`=3/2`

b) `72/95 xx 64/72 xx 95/72 xx 14/86 xx 72/64 xx 86/14`

`=(72xx64xx95xx14xx72xx86)/(95xx72xx72xx86xx64xx14)`

`= 1`.

Answer 2

a)1/2.(5/4+3/4+1)

=1/2.3

=3/2

 

Answer 3

b)=(72/95.95/72).(64/72.72/64).(14/86.86/14)

=1.1.1=1

 

Answer 4

=1