内容介绍：132+12 × 37 = =199+25×89 = =516+27×36 = =518+18×47 = =319+32×56 = =250+23 × 38 = =819+49×90 = =315+57×34 = =419+29×54 = =189+42×37 = =440+13 × 36 = =418+57×67 = =147+28×36 = =128+28×19 = =818+41×53 =