①90-28-30=
②100-80-8=
③97-(60-28)=
④62+(55-46)=
⑤78-24+37=
⑥73-(20+35)=
7×<65 6×<44
7×<36 3×<22
8×<60 7×<31
803-207= ÷5= 798+150= + =
0.25×8= 1.5- = 7.5÷ = 0.77+0.3=
9.8-8= × = 45.54÷45= 24× =