Question

(42x43+43x57+43)-360:4

456:2x18+456:3-102

tính nhanh

Answer 1

( 42 x 43 + 43 x 57 + 43 ) - 360 : 4

= ( 42 x 43 + 43 x 57 + 43 x 1 ) - 90

=  43 x ( 42 + 57 + 1 ) - 90

= 43 x 100 - 90

= 4300 - 90

= 4210

456 : 2 x 18 + 456 : 3 - 102

= 456 x 9 + 456 x 1/3 - 102

= 456 x ( 9 + 1/3 ) - 102

= 456 x 28/3 - 102

= 4256 - 102

= 4154

Answer 2

(42x43+43x57+43)-360:4

=43x(42+57+1)-90

=4300-90

=4210

456:2x18+456:3-102

=4154

Answer 3

=(42x43+43x57+43)-360:4

=(42x43+43x57+43x1)-360:4

=43x(57+42+1)-360x4

=43.100-360x4

=4300-1440

=2860