Ta có
12.43+6.14+15.53
=12.43+6.2.7+15.53
=12(43+7)+15.53
=12.50+15.53
=4.3.5.10+15.53
=15.40+15.53
=15(40+53)
=15.93
=(10+5).93
=10.93+5.93
=930+465
=1395
12.43 + 6.14 + 15.53
= 12.43 + 6.2.7 + 15.53
= 12.43 + 12.7 + 15.53
= 12.(43 + 7) + 15.53
= 12.50 + 15.53
= 4.3.5.10 + 15.53
= 15.40 + 15.53
= 15.93
= 1395
12.43 + 6.14 + 15.53
= 12.43 + 6.2.7 + 15.53
= 12.43 + 12.7 + 15.53
= 12.(43 + 7) + 15.53
= 12.50 + 15.53
= 4.3.5.10 + 15.53
= 15.40 + 15.53
= 15.93
= 1395