(元)
1.5×1= 910÷70= 2.2﹣1.9= 6÷7= 435+199=
+= -= ÷= 20×= ×=
387+102= 4.8× = 18.6-5.6= 0.25×39×4=
9.6+0.1= + = 32×125%= ×8+ =