1+4+7+10+…+292+295+298=_.
问题描述:
1+4+7+10+…+292+295+298=______.
答
此算式*有加数:
(298-1)÷3+1
=297÷3+1,
=99+1,
=100(个).
1+4+7+10+…+292+295+298
=(298+1)×100÷2,
=299×100÷2,
=14950.
故答案为:14950.