问题
解答题
①100+(10+20+30)
②100-(10+20+3O)
③100-(30-10)
答案
①100+(10+20+30)
=100+60,
=160;
②100-(10+20+3O)
=100-60,
=40;
③100-(30-10)
=100-20,
=80.
①100+(10+20+30)
②100-(10+20+3O)
③100-(30-10)
①100+(10+20+30)
=100+60,
=160;
②100-(10+20+3O)
=100-60,
=40;
③100-(30-10)
=100-20,
=80.