24×□-□×15=18,□=______.
填上适当的质数.24=______+______=______+______=______+______.
□+□+△+○=16□+△+△+○=13□+△+○+○=11□=______△=______○=______.
△+○=60,○+□=51,□+△=39,□=______.△=______,○=______.
○+□=91△+□=63△+○=46○=______△=______□=______.
125×(4+8)=______×______+______×______.
已知□+□+△=16,□+△+△=14,那么□=______,△=______.
填质数:21=______+______=______×______=______-______.
如果4A=5B,那么 AB=______;5=24÷______=______:15.
在算式□÷△=19…6中,除数最小是______这时被除数是______.
将0~9这十个数字分别填在右面的□里:□□×□=□□______,□□×□=□□______.
11+12+13+14+15=______×______.
3÷______=______÷24=75%=______折.