Răspuns :
24567-20455= 4122
4122*10=41220
al doilea mod Ș
10*(24567-20455)=10* 4122=41220
4122*10=41220
al doilea mod Ș
10*(24567-20455)=10* 4122=41220
10(24567-20455)=10x4112=41120
245670-204550=41120
1000(456+212)=1000x668=668000
456000+212000=668000