12,48 : 0,5 * 6,25 * 4 * 2 = 12,48 * 2 * 6,25 * 4 * 2
= 12,48 * 2 * ( 6,25 * 4 ) * 2
= 12,48 * 2 * 25 * 2
= 12,48 * 25 * ( 2 * 2 )
= 12,48 * 25 * 4
= 12,48 * ( 25 * 4)
= 12,48 * 100
= 1248
2 * 3,12 * 1,25 : 0,25 * 10 = 2 * 3,12 * 1,25 * 4 * 10
= 3,12 * 1,25 * ( 4 * 2 ) * 10
= 3,12 * 1,25 * 8 * 10
= 3,12 * ( 1,25 * 8 ) * 10
= 3,12 * 10 * 10
= 3,12 * ( 10 * 10 )
= 3,12 * 100
= 312
tttttttttttttttttttttttttttttjkkkkkkkfccđttjtttuujhfcfỵhjhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
faswyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
12,48 : 0,5 x 6,25 x 4 x 2 = 12,48 x 2 x 6,25 x 4 x 2
= 12,48 x 2 x ( 6,25 x 4 ) x 2
= 12,48 x 2 x 25 x 2
= 12,48 x 25 x ( 2 x 2 )
= 12,48 x 25 x 4
= 12,48 x ( 25 x 4)
= 12,48 x 100
= 1248
2 x 3,12 x 1,25 : 0,25 x 10 = 2 x 3,12 x 1,25 x 4 x 10
= 3,12 x 1,25 x ( 4 x 2 ) x 10
= 3,12 x 1,25 x 8 x 10
= 3,12 x ( 1,25 x 8 ) x 10
= 3,12 x 10 x10
= 3,12 x ( 10 x 10 )
= 3,12 x 100
= 312
học tốt nhé