直接写出得数.1.53﹣0.5= 7.8+0.9= 1+= 12÷0.4=0.56+4.44= 2,9+3.7+2.1= 4×0.25= 1.25×5×8=7.6×8+2.4×8=
口算.= = = 2.25+== 2.5×0.1= 7.5÷0.5= =20.1+9.09= ×= ﹣= 1÷0.1﹣1×0.1=(+)×63= 0.5÷= 0.4÷40%= 0.42﹣0.32=
+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= ÷=