(估算)49×104≈______×______=______(估算)98÷51 发布时间:2017-04-18 02:25 │ 来源:www.tikuol.com 题型:解答题 问题: (估算)49×104≈______×______=______(估算)98÷51≈______÷______=______估算过程:49≈______;104≈______估算过程:98≈______;51≈______.