x
10
15
y
12
①0.2x-3.4=6
②1.5: =x:8
图号
①
②
③
④
六边形的个数(个)
小棒的根数(根)
500-213= 10÷10%= 0.25+2.83= 1.25×0.8= 3.7-3.7÷3.7=
92-33= + = × = 9÷ = ( - )×20=