Question

3+10○15, 9-4○5, 6+4○11, 8+3○11, 9-1○9, 8+2○2.

Answer 1

13<15; 5=5 ; 10<11; 11=11; 8<9; 10>2

Answer 2

3+10*15＝55 9-4*5=25 6+4*11＝50 8+3*11＝41 9-1*9＝72 8+2*2＝12