19.98乘37减199.8乘1.9加1998乘0.82

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19.98乘37减199.8乘1.9加1998乘0.82
19.98乘37减199.8乘1.9加1998乘0.82

19.98乘37减199.8乘1.9加1998乘0.82
19.98乘37减199.8乘1.9加1998乘0.82
=(20-0.02)*37-(200-0.2)*1.9+(2000-2)*0.82
=(20-0.02)*37-(20-0.02)*19+(20-0.022)*82
=(20-0.02)*(37-19+82)
=19.98*100
=1998

1. 19.98*37-199.8*1.9+1998*0.82
原始=19.98*37-19.98*19+19.98*82
=(37-19+82)*19.98
=100*19.98
=1998