①+3=
②
③
④0.32=
⑤1÷0.1﹣0.1×1=
⑥0.25+0.75=
⑦8﹣0.08=
⑧621÷89=
①42×()
②7.5×(26-10)+9.7
③0.8×4×12.5×2.5
④÷[1-(+0.25) ]
120×12﹣14.4÷0.45
6.62﹣0.53﹣2.47
125×32×25
32÷25
35下
42下
85下
8下
100﹣27.5= += 90×= 0.72÷0.6=
1.25×0.8= ÷75%= 96×65%+96×35%= 12÷×=