问题
填空题
52+53+54+55+56+57+58=______.
答案
52+53+54+55+56+57+58,
=(52+58)×7÷2,
=110×7÷2,
=770÷2,
=385.
故答案为:385.
52+53+54+55+56+57+58=______.
52+53+54+55+56+57+58,
=(52+58)×7÷2,
=110×7÷2,
=770÷2,
=385.
故答案为:385.