103×323000 9200÷40092÷4 -13℃-3℃
324 ÷3610 28×7264×19 587001059万
400÷80= 7.7+2.3= 4.2÷0.6= 1﹣0.91=
0.04×1000= 10÷1.25×9= 24×0.25= 23﹣1=
+= ×20=