用简便方法计算1又6/13-2/9-7/9＋7/134又7/17-(2又7/17-2.375)6.801-（0.153+0.801）2009×37＋2009×64-20098÷0.12547×37/462又1/2×0.678×405.6÷0.25÷4900÷12.55×(3/5＋2/7)×7666×7＋58×1114/9×13＋7/9÷1/13-131000÷0.4÷1.25

Question

用简便方法计算
1又6/13-2/9-7/9＋7/13 4又7/17-(2又7/17-2.375)
6.801-（0.153+0.801） 2009×37＋2009×64-2009
8÷0.125 47×37/46 2又1/2×0.678×40
5.6÷0.25÷4 900÷12.5 5×(3/5＋2/7)×7
666×7＋58×111 4/9×13＋7/9÷1/13-13
1000÷0.4÷1.25÷8÷2.5
1急

Answer 1

1又6/13-2/9-7/9＋7/13=(1又6/13+7/13)-(2/9+7/9)=2-1=1
4又7/17-(2又7/17-2.375)=4又7/17-2又7/17+2.375)=2+2.375=4.375
6.801-（0.153+0.801）=6.801-0.153-0.801=6.801-0.801-0.153=6-0.153=5.847
2009×37＋2009×64-2009=2009×(37+64-1)=2009×100=200900
8÷0.125=8÷(1/8)=8×8=64
47×37/46=(40+7)×37/46=1739/46
2又1/2×0.678×40 =5/2×40×0.678=100×0.678=67.8
5.6÷0.25÷4=5.6×4÷4=5.6
900÷12.5=900÷(25/2)=900×2÷25=7200
5×(3/5＋2/7)×7=5×7×(3/5+2/7)=5×7×3/5+5×7×2/7=21+10=31
666×7＋58×111=6×111×7+58×111=42×111+58×111=(42+58)×111=11100
4/9×13＋7/9÷1/13-13=4/9
1000÷0.4÷1.25÷8÷2.5