题目
1.10-23+32-17-21+45
2.(3又5/6)+(2又2/5)-(+2又1/6)-(-7又3/5)
3.-9.2-(-7.1)-(-3)+6又1/5+(+2.9)
4.3.6+41.8-12又3/5-11-51又4/5
5.-1/8-2/5-4/9+2又3/8-3/5-5/9
2.(3又5/6)+(2又2/5)-(+2又1/6)-(-7又3/5)
3.-9.2-(-7.1)-(-3)+6又1/5+(+2.9)
4.3.6+41.8-12又3/5-11-51又4/5
5.-1/8-2/5-4/9+2又3/8-3/5-5/9
提问时间:2021-02-22
答案
1.10-23+32-17-21+45
=(10+32+45)-(23+17+21)
=87-61
=26
2.(3又5/6)+(2又2/5)-(+2又1/6)-(-7又3/5)
=23/6+12/5-13/6+38/5
=35/3
3.-9.2-(-7.1)-(-3)+6又1/5+(+2.9)
=(6.2+2.9+7.1+3)-9.2
=19.2-9.2
=10
4.3.6+41.8-12又3/5-11-51又4/5
=45.4-(12.6+11+51.8)
=45.4-75.4
=-30
5.-1/8-2/5-4/9+2又3/8-3/5-5/9
=(19/8-1/8)-(2/5+3/5)-(4/9+5/9)
=9/4-1-1
=1/4
=(10+32+45)-(23+17+21)
=87-61
=26
2.(3又5/6)+(2又2/5)-(+2又1/6)-(-7又3/5)
=23/6+12/5-13/6+38/5
=35/3
3.-9.2-(-7.1)-(-3)+6又1/5+(+2.9)
=(6.2+2.9+7.1+3)-9.2
=19.2-9.2
=10
4.3.6+41.8-12又3/5-11-51又4/5
=45.4-(12.6+11+51.8)
=45.4-75.4
=-30
5.-1/8-2/5-4/9+2又3/8-3/5-5/9
=(19/8-1/8)-(2/5+3/5)-(4/9+5/9)
=9/4-1-1
=1/4
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