300÷65=4···4040÷36=1···4所以可以买4×2+1=9箱还剩下4块钱
300/65=4...4040-35=54*2+1=9箱
(1)(20×5-58)÷(5+2),=42÷7,=6(道),答:她做错了6道.(2)(20×5-64)÷(5+2+5),=36÷12,=3(道),则做对了:20-3×2=14(道),答:小强做对了14道.