计算个位十位百位之和

简介：He suddenly woke up while still sleeping. Without saying anything, he immediately opened the English book with his left hand and held a pen in his right hand. He instantly entered a state of serious study. His eyes were bright, his brows were knitted, and the hand holding the pen was I kept writing words on the scratch paper, meditating from time to time, as if thinking about a grammatical problem.