△+○=60,○+□=51,□+△=39,□=______.△=______,○=______.
△+○=60,○+□=51,□+△=39,□=______.△=______,○=______.
□+□+△+○=16□+△+△+○=13□+△+○+○=11□=______△=______○=______.
○+□=91△+□=63△+○=46○=______△=______□=______.
125×(4+8)=______×______+______×______.
填质数:21=______+______=______×______=______-______.
化学方程式中符号的含义:“+”______,“=”______,“↑”______,“△”______,“↓”_____
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=______×______.
已知□+□+△=16,□+△+△=14,那么□=______,△=______.