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57×43+57×56+57 怎样简便算

43×57+56×57+57 =57×(43+56+1) =57×100 =5700

(1)23-57+43-27=(23+43)-(57+27)=2-1=1;(2)(79+56-14)...

56X57+43X56 =56X(57+43) =56X100 =5600

(1)57+56+27+16=(57+27)+(56+16)=1+1=2;(2)58×19×45=5...

将7/6等化为1又1/x,看x的规律,得8+[n/(2n+6)],数一下n是8,所以得8+(8/22...

(43.56+5.44)+(21.26+0.74)-(3.43+7.57) =49+22-11 ...

43✘76+57✘56简便方法 43d...

如图

1.125*3+125*5+25*3+25 2.9999*3+101*11*(101-92) ...

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