240+24=
483﹣238=
60×4=
270÷3=
9×700=
96÷3=
306+275=
7×3+24=
300+450+250=
600﹣(180+220)=
730﹣400÷8=
- = × = 80÷10%= 42×3.14=
30%+0.45= 3.6÷0.18= 2- = 6- - =