6 x 60 = 360 160 : 40 = 4 66 – 33 = 33
7 x 70 = 490 630 : 70 = 9 55 – 24 = 31
5 x 50 = 250 360 : 60 = 6 77 – 36 = 41
3 x 30 = 90 90 : 30 = 3 79 – 22 = 57
8 x 80 = 640 810 : 90 = 9 33 – 15 = 18
9 x 90 = 810 630 : 70 = 9 48 + 13 = 61
4 x 40 = 160 350 : 50 = 7 75 + 16 = 91