54 x 2 x 9 x 5
= 54 x 9 x 2 x 5
= 486 x 10
= 4860
246 x 62 + 246 x 38
= 246 x ( 62 + 38 )
= 246 x 100
= 24600
428 x 56 - 428 x 46
= 428 x ( 56 - 46 )
= 428 x 10
= 4280
54 x 2 x 9 x 5
= 108 x 45
= 4860
246 x 62 + 246 x 38
= 246 x ( 62 + 38 )
= 246 x 100
= 24600
428 x 56 - 428 x 46
= 428 x ( 56 - 46 )
= 428 x 10
= 4280
Chúc bạn học tốt nha !
54 x 2 x 9 x 5
= (2 x 5) x 54 x 9
= 10 x 486
= 4860
246 x 62 + 246 x 38
= (62 + 38) x 246
= 100 x 246
= 24600
428 x 56 - 428 x 46
= (56 - 43) x 428
= 10 x 428
= 4280
54 x 2 x 9 x 5
= ( 2 x 5 ) x 54 x 9
= 10 x 54 x 9
= 540 x 9
= 4860
246 x 62 + 246 x 38
= 246 x ( 62 + 38 )
= 246 x 100
= 24600
428 x 56 - 428 x 46
= 428 x ( 56 - 46 )
= 428 x 10
= 4280