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连乘、连除和乘除混合运算,苏教版义务教育教科书小学数学二年级(上册),口算,98= 284= 87= 357= 96= 729=,72,5,7,54,56,8,加减混合计算,20+6+7= 14-7-6= 25+7-8=,33,1,24,6,234,6,24,3643,9,27,4862,4,836,4,8,24,1.,9,45,6,4,48,2,45,48,2,2.,639,2,249,72,1642,2,3668,926,3249,48,3,72,3.,56,24,38,3,40,44,2,9,32,拓展练习,1892 20255,0,25,谢 谢,