Ta có : \(4.05.38,36+4,05.51,64+5,5\)
\(=4,05.\left(38,36+51,64\right)+5,5\)
\(=4,05.90+5,5\)
\(=364,5\)\(+5,5\)
\(=370\)
\(4,05\times38,36+4,05\times51,64+5,5\)
\(=4,05\times\left(38,36+51,64\right)+5,5\)
\(=4,05\times90+5,5\)
\(=364,5+5,5\)
\(=370\)
hk tốt ~
Ta có : 4,05 × 38,36 + 4,05 × 51,64 + 5,5
= 4,05 × ( 38,36 + 51,64 ) + 5,5
= 4,05 × 90 + 5,5
= 364,5 + 5,5
= 370
HOK TỐT
4,05 x 38,36 + 4,05 x 51,64 + 5,5
= 4,05 × ( 38,36 + 51,64) + 5,5
= 4,05 x 100 + 5,5
= 405 + 5,5
= 410,5