脱式计算,能简算的要简算(219-135)×1.6÷(186×17) &...
脱式计算,能简算的要简算(219-135)×1.6÷(186×17)910×67.8+54.3÷119-221×9%3333×3333+9999×8889+92011×2...
脱式计算,能简算的要简算(219-135)×1.6÷(186×17) 910×67.8+54.3÷119-221×9%3333×3333+9999×8889+9 2011×2011+20112012×2012?2012.
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小莫3aN2
2014-10-07
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(1)(2
-1
)×1.6÷(186×
)
=
×1.6÷
=
÷=
;
(2)
×67.8+54.3÷1
-221×9%
=(67.8+54.3-22.1)×90%
=100×90%
=90;
(3)3333×3333+9999×8889+9
=9999×1111+9999×8889+9
=(1111+8889)×9999+9
=10000×9999+9
=99990000+9
=99990009;
(4)
2011×2011+2011 |
2012×2012?2012 |
=
(2011+1)×2011 |
(2012?1)×2012 |
=
=1.
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