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用简便方法计算567+142+558546-378-1621458+999796+643-596475-303265+318+35.
题目详情
用简便方法计算
567+142+558 | 546-378-162 | 1458+999 | 796+643-596 | 475-303 | 265+318+35. |
▼优质解答
答案和解析
①567+142+558,
=567+(142+558),
=567+700,
=1267;
②546-378-162,
=546-(378+162),
=546-540,
=6;
③1458+999,
=1458+1000-1,
=2458-1,
=2457;
④796+643-596,
=796-596+643,
=200+643,
=843;
⑤475-303,
=475-300-3,
=175-3,
=172;
⑥265+318+35,
=265+35+318,
=300+318,
=618.
=567+(142+558),
=567+700,
=1267;
②546-378-162,
=546-(378+162),
=546-540,
=6;
③1458+999,
=1458+1000-1,
=2458-1,
=2457;
④796+643-596,
=796-596+643,
=200+643,
=843;
⑤475-303,
=475-300-3,
=175-3,
=172;
⑥265+318+35,
=265+35+318,
=300+318,
=618.
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