Question

Tính nhanh 

35x12+65x13

Answer 1

35 x 12 + 65 x 13 

= 35 x 12 + 65 x ( 12 + 1 )

= 35 x 12 + 65 x 12 + 65 x 1

= 12 x ( 35 + 65 ) + 65 

= 12 x 100 + 65 

= 1200 + 65 

=1265

Answer 2

   35 . 12 + 65 . 13 

= 35 . 12 + 65 . (12 + 1 )

= 35 . 12 + 35 .12 + 65 

= ( 35 + 65 ) . 12 + 65 = 1200 + 65 = 1265

Answer 3

=35.12+65.(12+1)

=35.12+65.12+65

=(35+65).12+65

=100.12+65

=1200+65

1265

Answer 4

35x12 + 65x13

= 35x12 + 65x(12+1)

= 35x12 + 65x12 + 65

= 12x(35+65) + 65

= 1200 + 65

= 1265

Answer 5

35×12+65×13 =35×(13-1)+65×13 =35×13-35+65×13 =100×13-35 =1300-35 =1265 Dễ mà bạn