24×25=×100 1200÷25=÷100
(+)×9= 1.5×100= 99×0.8+0.8= 42=
+= 7﹣= ×= ÷=
126+298= 36×= 0.36÷0.3= 2﹣= -=
÷= 0.62= 15.7÷3.14= 60×40%= 30﹣9÷=