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
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