1.25x67.875+125x6.7875+1.25x53.375
=1.25(67.875+678.75+53.375)
=1.25*800
=1000;
3.6x42.3x3.75-12.5x0.423x28
=42.3(3.6*3.75-1.25*2.8)
=42.3*1.25*(3.6*3-2.8)
=42.3*1.25*8
=423;
1-0.1-0.01-0.001-0.0001-...-0.000000001
=1-0.111111111
=0.88888889;
减数=10.4/2=5.2;
被减数=5.2+8.6=13.8;
较大数为13.8;
较大数=10*7.02/(10-1)=7.8