下午放学回到家里,我放下书包开始做作业。这时爷爷走过来,指着书桌上的一张纸问:“这是草稿纸?作文本上撕下来的?真可惜!”我说:“不是,这是我在教室地板上捡到的。”“哦,好孩子,知道节约了,值得表扬!”说着,爷爷搬了只小板凳,坐在我的身边,“来,跟爷爷一起算笔账,我出几道题,你来算。”我说:“爷爷,您是考我吧。”爷爷笑了:“我先问你, Back to school in the afternoon after school, I put down my schoolbag to start my homework. At this moment my grandfather came and pointed at a piece of paper on the desk and asked: ”Is this a piece of scratch paper? It’s a shame!“ I said: ”No, this is my picking up on the classroom floor “” Well, good boy, know that saving, commendable! “Said, my grandfather moved a small bench, sitting beside me, ” Come, count grandpa with pen, I am out A few questions, you come to count. “I said: ” Grandpa, you are testing me. “Grandpa smiled: ” I first ask you,