1999998+199998+19998+1998+198+88

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1999998+199998+19998+1998+198+88
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1999998+199998+19998+1998+198+88
1999998+199998+19998+1998+198+88

1999998+199998+19998+1998+198+88
1999998+199998+19998+1998+198+88
=1999998+2+199998+2+19998+2+1998+2+198+2+88-10
=2000000+200000+20000+2000+200+78
=2222278

=2000000+200000+20000+2000+200+88-2*6=2222276

原式=2000000+200000+20000+2000+200+100-2×5-12= 2222300-22= 2222278

2000000-2+200000-2+20000-2+2000-2+200-2+100-12=22222078

解 :原式=(2000000-2)+(200000-2)+(20000-2)+(2000-2)+(200-2)+88
=2000000+200000+20000+2000+200-10+88
=2222200-10+88
=2222278

1999998+199998+19998+1998+198+88
= 2000000-2+200000-2+20000-2+2000-2+200-2+88
= 2222200+88-10
= 2222278

2220280计算得出

2000000-2+200000-2+20000-2+2000-2+200-2+100-12
=2222300-20
=2222280

1999,998+199,998+19,998+1,998+198+88
=2000,000-2+200,000-2+20,000-2+2,000-2+200-2+100-12
=2222,200+100-22
=2222,300-22
=2222,278