-

1 . ! , !

1

2 2 , , , . , ?

. ?

3

1 28 7 + 10 = 942 13 + 15 24 = 60 55 + 20 = 75; 4 * 15 = 40; 100 : 25 = 4; 60 - 22 = 28; 15+ 15 = 30; 2 * 2 = 5; 99 + 1 = 100; 28 : 7 = 9.

4

120* 3+3745- 2384+2792000160 * 2+3785-2248+143200010 5

*

5

, . !- 5 !

648, 651, . 98