(1)(-270)X1\4+0.25X21.5+(-8 1\2)X(-25%)
(2)有10数相乘,积为负数,那么这10个数中,负数的个数有多少种可能?如果有100数相乘呢,负数的个数有多少种可能?
(3)填完整.
A:What`s this in English?
B:It`s a dictionary.
A:This is your dictionary?
B:yes,it is.
A:___________it___________English dictionary?
B:___________,it___________.it`s a Chinese___________.