Neidio i'r prif gynnwys
Enrhifo
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Ffactor
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Problemau tebyg o chwiliad gwe

Rhannu

51+2+10+20-80
Adio 50 a 1 i gael 51.
53+10+20-80
Adio 51 a 2 i gael 53.
63+20-80
Adio 53 a 10 i gael 63.
83-80
Adio 63 a 20 i gael 83.
3
Tynnu 80 o 83 i gael 3.