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第1个回答 2016-07-22
23×(3+19/23)带分数,又相当于加号,用加法分配律=23×3+23×19/23=69+19=88
第2个回答 2016-07-22
88×35-87×23-86×12
=88x(23+12)-87x23-86x12
=88x23+88x12-87x23-86x12
=(88-87)x23+(88-86)x12
=1x23+2x12
=23+24
=47
=88x(23+12)-87x23-86x12
=88x23+88x12-87x23-86x12
=(88-87)x23+(88-86)x12
=1x23+2x12
=23+24
=47