67.2-(12.63-9.04)的简便运算?
3个回答
展开全部
67.2一(12.63一9.04)
=67.2一12.63+9.04
=67+0.2一12一0.6一0.03+9+0.04
=(67+9一12)+(0.2一0.6)
+(0.04一0.03)
=64一0.4+0.01
=63.61。
=67.2一12.63+9.04
=67+0.2一12一0.6一0.03+9+0.04
=(67+9一12)+(0.2一0.6)
+(0.04一0.03)
=64一0.4+0.01
=63.61。
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展开全部
67.2-(12.63-9.04)
=67.2-12.63+9.04
=54.57+9.04
=63.61
=67.2-12.63+9.04
=54.57+9.04
=63.61
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展开全部
=67.2-12.63+9.04
=67.2+9.04-12.63
=76.24-12.63
=76+0.24-12-0.63
=76-12+0.24-0.63
=(76-12)-(0.63-0.24)
=64-(0.63+0.01-0.01-0.24)
=64-(0.64-0.01-0.24)
=64-(0.64-0.24-0.01)
=64-(0.4-0.01)
=64-0.39
=63.61
=67.2+9.04-12.63
=76.24-12.63
=76+0.24-12-0.63
=76-12+0.24-0.63
=(76-12)-(0.63-0.24)
=64-(0.63+0.01-0.01-0.24)
=64-(0.64-0.01-0.24)
=64-(0.64-0.24-0.01)
=64-(0.4-0.01)
=64-0.39
=63.61
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