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(1+0.21+0.32)×(0.21+0.32+0.43)-(1+0.21+0.32+0.43)×(0.21+0.32)如题
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(1+0.21 +0.32)×(0.21+0.32+0.43)-(1+0.21 +0.32+0.43)×(0.21+0.32)如题
▼优质解答
答案和解析
=(1+0.21 +0.32)×(0.21+0.32+0.43-(0.21+0.32))+(1+0.21 +0.32)×0.43==(1+0.21 +0.32)×0.43-(1+0.21 +0.32)×0.43=0
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