早教吧 育儿知识 作业答案 考试题库 百科 知识分享

用简便方法计算下面各题.244+(87+56)128+264+82+46548+117+92+1832379-456-544(152+74)+(26+48)7345-2980-345

题目详情
用简便方法计算下面各题.
244+(87+56)128+264+82+46      548+117+92+183
2379-456-544      (152+74)+(26+48)7345-2980-345
用简便方法计算下面各题.
244+(87+56)128+264+82+46      548+117+92+183
2379-456-544      (152+74)+(26+48)7345-2980-345

244+(87+56)128+264+82+46      548+117+92+183
2379-456-544      (152+74)+(26+48)7345-2980-345
244+(87+56)128+264+82+46      548+117+92+1832379-456-544      (152+74)+(26+48)7345-2980-345244+(87+56)128+264+82+46      548+117+92+183244+(87+56)128+264+82+46      548+117+92+1832379-456-544      (152+74)+(26+48)7345-2980-3452379-456-544      (152+74)+(26+48)7345-2980-345
▼优质解答
答案和解析
(1)244+(87+56)=(244+56)+87=300+87=387(2)128+264+82+46 =(128+82)+(264+46)=210+310=520(3)548+117+92+183=(548+92)+(117+183)=640+300=940(4)2379-456-544=2379-(456+544)=2379-1000=1379...