4.
a)
92 x 4 = 184 x 2 = 368
235 x 4 = 470 x 2 = 940
b)
29 x 6 = 87 x 3 = 261
56 x 6 = 168 x 3 = 504
5.
62 x 14 = 840 + 28 = 868
35 x 15 = 450 + 75 = 525
31 x 22 = 620 + 62 = 682
25 x 24 = 480 + 120 = 600
13 x 31 = 390 + 13 = 403
