(-53.02)(-69.3)+(-130.7)(-5.02)的简便运算

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(-53.02)(-69.3)+(-130.7)(-5.02)的简便运算(-53.02)(-69.3)+(-130.7)(-5.02)的简便运算(-53.02)(-69.3)+(-130.7)(-5.

(-53.02)(-69.3)+(-130.7)(-5.02)的简便运算
(-53.02)(-69.3)+(-130.7)(-5.02)的简便运算

(-53.02)(-69.3)+(-130.7)(-5.02)的简便运算
(-53.02)(-69.3)+(-130.7)(-5.02)
=53.02*69.3+130.7*5.02
=53*69.3+0.02*69.3+130.7*5+130.7*0.02
=53*69.3+130.7*5+0.02(69.3+130.7)
=53*(70-0.7)+(130+0.7)*5+0.02*200
=53*70+130*5-0.7(53-5)+4
=3710+650-33.6+4
=4330.4