题目内容
计算:
| 195+196+197+198+199 | 116-48+84. |
(1)195+196+197+198+199,
=200×5-(5+4+3+2+1),
=1000-15,
=985;
(2)116-48+84.
=116+84-48,
=200-48,
=152.
=200×5-(5+4+3+2+1),
=1000-15,
=985;
(2)116-48+84.
=116+84-48,
=200-48,
=152.
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