Урок математики
12 – 5 = 713 – 9 = 48 + 9 = 175 + 7 = 1411 – 8 =3
50, 70, 90, 20, 36, 40, 10, 80, 60.
10, 20, 30, 40, 50, 60, 70, 80, 90.
30
23 + 77 = 48 + 52 = 36 + 14 = 76 + 14 = 65 + 35 =
100