0.12×63+1.9×126+196×0.74的简便计算?
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2022-07-10
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0.12×63+1.9×126+196×0.74的简便计算?
0.12×63+1.9×126+196×0.74
=63x2x(0.06+1.9)+1.96x74
=126x1.96+1.96x74
=1.96x(126+74)
=1.96x200
=392
0.12×63+1.9×126+196×0.74
=63x2x(0.06+1.9)+1.96x74
=126x1.96+1.96x74
=1.96x(126+74)
=1.96x200
=392
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