1) 954:3 + 512:4 = (900+54):3 + (500+12):4 = (300+18)+(125+3) =
= 318 + 128 = 446
2) 234*4 - 147*5 = (250-16)*4 - (150-3)*5 = (1000-64)-(750-15) =
= 936 - 735 = 201
3) 672:8 - 441:9 = (640+32):8 - (450-9):9 = (80+4) - (50-1) =
= 84 - 49 = 35
4) 8 * 8 : 16 = 8 * 8 : 8 : 2 = 8 * 1 : 2 = 4
5) 9 * 8 : 12 = 3 * 3 * 4 * 2 : 4 : 3 = 3 * 2 = 6
6) 7 * 8 : 14 = 7 * 2 * 4 : 7 : 2 = 4
7) 45 000 : 100 = 450 * 100 : 100 = 450
8) 6 000 * 100 = 600 * 10 * 100 = 600 * 1 000 = 600 000
9) 6 000 + 100 = 60 * 100 + 1 * 100 = (60 + 1) * 100 = 61 * 100 = 6 100