(98+95+100+99+100+96+97+99)÷8
=(100-2+100-5+100+100-1+100+100-4+100-4+100-3+100-1)÷8
=(900-2-5-1-4-4-3-1)÷8
=(900-20)÷8
=880÷8
=110
(98+95+100+99+100+96+97+99)÷8
=(100-2+100-5+100+100-1+100+100-4+100-4+100-3+100-1)÷8
=(900-2-5-1-4-4-3-1)÷8
=(900-20)÷8
=880÷8
=110