﹝﹣22﹞×﹝﹣99﹞＋11×﹝﹣66﹞－33×44
=22×99-11×66-33×44
=66×33-66×11-66×22
=66×（33-11-22）
=66×0
=0
﹝﹣22﹞×﹝﹣99﹞＋11×﹝﹣66﹞－33×44
2个回答
相关问题
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