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(2+3.15+5.87)X(3.15+5.87+7.32)—(2+3.15+5.87+7.32)X(3.15+5.87)要简便

题目详情
(2+3.15+5.87)X(3.15+5.87+7.32)—(2+3.15+5.87+7.32)X(3.15+5.87)要简便
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答案和解析
(2+3.15+5.87)X(3.15+5.87+7.32)—(2+3.15+5.87+7.32)X(3.15+5.87)
=2×(3.15+5.87+7.32)+(3.15+5.87)×(3.15+5.87+7.32)—2×(3.15+5.87)-(3.15+5.87+7.32)×(3.15+5.87)
=2×(3.15+5.87+7.32)-2×(3.15+5.87)
=2×7.32
=14.64