(1)I have _________ book. (2)look _________ my elephant. (3)The pen is ___________ the right. (4)Happy birthday __________ you. (5)The plate is ___________ the middle.
填上下列算式中所缺的数字。(10’) (1)four + two = _____________ (2)seven + __________ = eight (3)ten - five = ___________ (4)_________ + three = nine (5)_________ - three = one