6﹣2= 18÷9= 5.6×= += 8÷=÷0.8= 3.6﹣1= ×= 3.14×4= +=+2= 0.45÷= 55÷= 8÷= 10﹣9.45=3+4= 0.36×100= 0.5÷100= 1×= ÷7=