用竖式计算.603×25820×7049×360504×30.
+62.5%= 78×9.9+7.8= 7×÷7×= +=3.2万+1.8万= 4×2.7×0.25= 5﹣0.25+0.75= 0.42﹣0.32=
直接写出得数1÷= 0.4+4.73= ÷= +=×= +0.8= ×÷×= (+)×120=
口算:÷62.5%= ÷8= 1.8÷= 0.375+﹣0.01= ×÷×=0.25×4÷= ×÷×= 19÷= 0.125××8= 6.4×﹙1﹣1.25﹚=
直接写得数36+48= 920﹣460= 570÷10= 12.5÷0.5=4﹣2.4= 0.125×8= 3.6×25%= ×=3.5+4.7= 0.23÷0.1= ÷3= ÷=
直接写得数.1÷= ×= += 2﹣=4.2×0.5= 0.25×0.6= 246+198= ﹣== = = 84.6+4== 10÷0.5= = 603×39≈4980÷51≈ 9.3÷0.03= ÷2÷= 9﹣﹣.