Toán Lớp 6: Tính hợp lý (−127) ⋅ (1 − 582) − 582.127 −225.35 + 225.136 − 225

Question

Toán Lớp 6:  Tính hợp lý (−127) ⋅ (1 − 582) − 582.127 −225.35 + 225.136 − 225

maingocquynhnhu2k1 · Answer

a) (&minus;127) &sdot; (1 &minus; 582) &minus; 582.127    Ta c&oacute;:   ( -127 ) . ( 1 - 582 ) - 582 . 127   = ( -127 ) . ( -581 ) + 582 . ( -127 )   = ( -127 ) . ( -581 + 582 )   = ( -127 ) . 1   = ( -127 )    b)(&minus;225).35 + 225.136 &minus; 225     Ta c&oacute;:     (&minus;225) . 35 + 225 . 136 &minus; 225      = 225 . ( -35 ) + 225  . 136 - 225 . 1     = 225 . [( -35 ) + 136 - 1]     = 225 . 100     = 22 500

ngochuong2k2 · Answer

a)     ( &minus; 127 ) . ( 1 &minus; 582 ) &minus; 582   . 127      = ( &minus; 127 ) . ( &minus; 581 ) &minus; 582 . 127      = 127 . 581 &minus; 582 . 127      = 127 . ( 581 &minus; 582 )      = 127. ( &minus; 1 )      = &minus; 127     b) &minus;225 . 35 + 225 . 136 &minus; 225      = 225 . ( -35 ) + 225  . 136 - 225 . 1     = 225 . [( -35 ) + 136 - 1]     = 225 . 100     = 22 500