①4.56-(1+0.4)×3.2
②73×1.61+1.61×28-1.61
③6.24×8×(0.47+0.25+0.53)
④38.4÷0.16-6.8×35+7.8
⑴
⑵+2=
⑶
⑷-1=
⑸
⑹
⑺
⑻
⑼
⑽
45×0.2= 10﹣0.89= 2.8×= 8÷=
0.8×125%= ÷= += 1﹣1÷9=
0.32= 32×196≈