两题的简算

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两题的简算

两题的简算
两题的简算
 

两题的简算
9999x7778+3333x6666
=9999x7778+3333x3x2222
=9999x(7778+2222)
=9999x10000
=99990000
5.6x69.32+138.64x0.05+693.2x0.43
=69.32x5.6+69.32x2x0.05+69.32x10x0.43
=69.32x(5.6+0.1+4.3)
=69.32x10
=693.2