△+○=60,○+□=51,□+△=39,□=______.△=______,○=______.
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△+○=60,○+□=51,□+△=39,□=______.△=______,○=______.
△+○=60,所以△=60-○;因为○+□=51,所以□=51-○;
因为□+△=39,
即51-○+(60-○)=39,
111-2○=39,
○=36;
所以△=60-○=60-36=24;
□=51-○=51-36=15;
故答案为:15,24,36.
因为□+△=39,
即51-○+(60-○)=39,
111-2○=39,
○=36;
所以△=60-○=60-36=24;
□=51-○=51-36=15;
故答案为:15,24,36.
△+○=60,○+□=51,□+△=39,□=______.△=______,○=______.
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已知△+○=□,如果△+○+□=60,那么□=______.
3.76°=______度 ______分 ______秒.
填上适当的质数.24=______+______=______+______=______+______.
巧填单位名称.1______-59______=1______;1______-9______=1______;1___
0.87×99+0.87=______×______.
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