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北师大版小学数学二年级下册,第3课,第五单元,87139,导入新课,87,139,226,种,100,9,87,187,217,87100187,18730217,2179226,30,226,新课学习,87,139,226,种,新课学习,87,139,226,种,87,139,6,2,2,1,1,新课学习,26889,304197,686235,268,89,7,5,3,1,1,357,304,197,1,0,5,1,1,501,686,235,1,2,9,1,1,921,课堂练习,90,479,482,3,482,课堂练习,100,9,553,623,70,632,632,课堂练习,368+68436(元),课堂练习,答:买1套桌椅共花436元。,580+365945(元),课堂练习,答:买1张床和1个书柜共花945元。,368+365733(元),68+365433(元),课堂练习,368+68436(元),580+68648(元),487,5,4,5,1,1,58,545,课堂练习,337,584,1,2,9,1,1,921,课堂练习,199,726,5,2,9,1,1,925,课堂练习,397,432,7,2,9,435,275,7,0,0,278,256,2,2,1,1,8,1,1,4,1,3,5,课堂练习,课堂练习,结论总结,今天你学习到了什么?,