=
÷5%=
10%×5=
1÷25%=
⑴
⑵
⑶
⑷4.8+0.36+5.2+0.64
⑸2.5×1.25×32
⑹8.59×[40÷(3.49﹣3.09)]
1÷= ×= ÷= ×2=
+= ÷= ÷0.5= ×30%=