500-400/(×+43)=495
-400/(×+43)=-5
400/(×+43)=5
5 (×+43)=400
5×+215=400
5×=185
×=37
1) 25 + 20 = 45 ( игр.) - шариков и звёздочек.
2) 65 - 45 = 20 ( игр.) - сосулек.
22/15=1ц 7/15
16/3=5 1/3
15/4=3 3/4
29/7=4 1/7
36/11=3 3/11
108/13=8 4/13
==================
1 1/2<2 1/3
3 2/3<5 3/4
4 2/7>3 1/14
3 2/5<4 1/2
5 2/3>3 2/4
1 2/3<2 3/4