简算:(1)9999*7778+3333*6666(2)5.6*69.32+138.64*0.05+693.2*0.43

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简算:(1)9999*7778+3333*6666(2)5.6*69.32+138.64*0.05+693.2*0.43
简算:
(1)
9999*7778+3333*6666
(2)
5.6*69.32+138.64*0.05+693.2*0.43

简算:(1)9999*7778+3333*6666(2)5.6*69.32+138.64*0.05+693.2*0.43
(1)
9999*7778+3333*6666
=9999*7778+3333*(2222*3)
=9999*7778+(3333*3)*2222
=9999*7778+9999*2222
=9999*(7778+2222)
=9999*10000
=99990000
(2)
5.6*69.32+138.64*0.05+693.2*0.43
=5.6*69.32+69.32*(2*0.05)+69.32*(10*0.43)
=5.6*69.32+69.32*0.1+69.32*4.3
=(5.6+0.1+4.3)*69.32
=10*69.32
=693.2

9999*7777+9999+9999*2222=99990000
5.6*69.32+138.64*0.05+693.2*0.43
=5.6×69.32+69.32×0.1+69.32×4.3
=69.32×10
=693.2

2212222610000000000000098+9+