七上数学有理数的乘方混合运算期中特训 DAY 1 (1)[59-()×(-6)2]÷(-7)2 =[59-()×36]÷49 =(59363636)÷49 =(59-28+33-6)÷49 =58÷49 . (2)(-12)-5+(-14)-(-39) =(-12)+(-5)+(-14)+39 =8 七上数学有理数的乘方混合运算期中特训 DAY 2 (1)()×(-24) (-24)(-24)(-24) =20+(-9)+6 =17 (2)()()÷(-15)