+ = ﹣ = + = ﹣ =
15× = × = × = 48× =
29 + 13 = 1- 35 = 56 - 38 = 57 - 114 =
47 ×8= 913 × 34 = 58 × 310 = 825 × 512 =
78→×35()→×20()←×37()→×29()
4×12=
13×12=
12×24=
8×17=
34×45=
1517×1720=
712×621=
89×320=