Tính bằng cách thuận tiện :
37 x 68 + 123 x 74
= 37 x 68 + 123 x 2 x 37
= 37 x 68 + 246 x 37
= 37 x ( 246 + 68 )
= 37 x 314
= 11618
37 x 68 + 123 x 74
= 37 x 68 + 123 x 2 x 37
= 37 x 68 + 37 x 246
= 37 x ( 68 + 246 )
= 37 x 314
= 11618
37 x 68 + 123 x 74
= 37 x 2 x 34 + 123 x 74
= 74 x 34 + 123 x 74
= 74 x ( 34 + 123 )
= 74 x 157
= 11618
Chúc bạn học tốt !!!
37x68+123x74
=37x68+123x37x2
=37x[68+123x2]
=37x314
=11618
37x68+123x74
=37x68+123x37x2
=37x[68+123x2]
=37x314
=11618
=37*68+123*2*37
=3768+246*37
=37*[246+68]
=37*314
=11618
37 x 68 + 123 x 74
=37 x 68 + 123x2x37
=37x(68+246)
=37x314
=11618
