第1个回答 2016-04-19
(248-297÷7)*52
＝（248-42.43）*52
=248*52-42.43*52
=12896-2206.36
=10688.64
第2个回答 2016-04-19
（248-297/7）x52
=（248x7-297）x52/7
=（250x7-2x7-297）x52/7
=（1750-14-297）x52/7
=（1439x50+1439x2）/7
=（71950+2878）/7
=74828/7
=10689.71本回答被网友采纳
第3个回答 2016-04-20
(248-297÷7)*52
=[248-(294+3)/7]*52
=[248-42-3/7]*52
=[206-3/7]*52
=(200+5+4/7)*52
=10400+260+208/7
=10660+(210-2)/7
=10660+30-2/7
=10689又5/7