六年级数学下册口算练习题7415= 633= 0.990.09= 125 + 4= 1252414035199 +226 25098538962 3771 493219 344-189 = += = 7.451.05= 1.03+0.07= 9.898 0.125218 = 40660 675298 5.31.8 9.77 2516 42060 2.50.4 8.41.4 2 115% 35%45% 26101 30012 193380 506317 12823 24139+= += 4= =12= = 6= =+= = = = 7 4= += += 3= =24= = 6 = = 4 25 4 16 = += 5= -=