A×(B÷2) = (A×10)×(B×10)= (A×5)×(B÷5) =
①73000÷125
②9000÷8÷125
③6200÷(5×62)
④510÷34+ 17
⑤45×71+29×45
⑥54×63+38×54-54
48.76+3.64=
24.6-9.87=
×= 0.54÷6= ÷= 2.6×0.3= 27.8﹣1.9=