Obliczenia :
346 + 533 = 346 + 500 + 30 + 3 =
= 846 + 30 + 3 = 876 + 3 = 879
392 + 201 = 392 + 200 + 1 = 592 + 1 = 593
424 + 432 = 424 + 400 + 30 + 2 =
= 824 + 30 + 2 = 854 + 2 = 856
770 + 128 = 770 + 100 + 20 + 8 =
= 870 + 20 + 8 = 890 + 8 = 898
512 + 437 = 512 + 400 + 30 + 7 =
= 912 + 30 + 7 = 942 + 7 = 949
682 + 312 = 682 + 300 + 10 + 2 =
= 982 + 10 + 2 = 992 + 2 = 994
