,2.5,2.8,,3.4
①675-(275+43)
②1.83+3.7+6.3+5.17
③18.7-4.79+5.03
④296+204÷(52-35)
⑤312×33+33×188
⑥25×32×125
×12= -= 100×50%= 0.32= 5﹣0.99=