e) 25 . 12 f) 125 . 24 g) 25 . 72 h) 444 . 75
=(25 . 4) . 3 = (125 . 8) . 3 = (25 . 4) . 18 = 111 . (4 . 75)
= 100 . 3 = 1000 . 3 = 100 . 18 = 111 . 300
= 300 = 3000 = 1800 = 33300
i) 29 . 40 k) 43 . 11 m) 67 . 101 n) 423 . 1001
=(20 + 9) . 40 = 43 . (10+1) = 67 . (100 + 1) = 423 . (1000 + 1)
= 20 . 40 + 9 . 40 = 43 . 10 + 43 . 1 = 67 . 100 + 67 . 1 = 423 .1000 + 423 . 1
= 800 + 360 = 430 + 43 = 6700 + 67 = 423000 + 423
= 1160 = 473 = 6767 = 423423