育才小学六年级举行数学竞赛，共20道试题．做对一题得5分，不做得0分，做错一题倒扣2分．
（1）小倩每道题都做了，却只得了58分．她做错了几道题？
（2）小强得了64分，他做错的题和没有做的题一样多．小强做对了几道题？
相关试题
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=直接写得数．
2/5﹣1/10= 16÷2/7= 1/2÷3/5= 1/7×1/7= 1/4×2/5=
5/6﹣1/2= 2/7×0+9= 3/5×1/21= 2/7×21= 14/17÷7=
1÷5﹣1/5= 4/7+4/7×6= （1/8+4/8）×4/5= 6×5÷1/2= 1/9÷1/3=
5/9×1/5÷5/9×1/5=
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