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54 19.9 0.54的简便运算

54=5.4*19.1=55.4*19.4*(19.9+0.9+0.4*0.9+5

54x19.9十0.54=54x19.9十54x0.01=54x19.91=1075.14

=0.54*199+0.54*1=0.54*(199+1)=0.54*200=108

5.4x19.9+0.54=5.4x19.9+5.4x0.1=5.4x(19.9+0.1)=5.4x20=108

=0.54x199+0.54=0.54x(199+1)=0.54x200=108

展开全部5.4*19.9+0.54= 5.4 * 19.9 + 5.4 * 0.1= 5.4*(19.9 + 0.1)= 5.4* 20= 108

0.54*199+0.54=0.54*200=108

=5.4x19.9+5.4x0.1=5.4x(19.9+0.1)=5.4x20=108

4.9x5.4+51x0.54=4.9x5.4+5.1x5.4=(4.9+5.1)x5.4=10x5.4=54

0.46*1.9+0.54*1.9=(0.46+0.54)*1.9=1*1.9=1.9

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