1.123+234+345+456+567+678+789
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/09/20 18:55:13
1.123+234+345+456+567+678+789
2.20082008*2007-2008*20072007
3.5000-1-2-3-4-.40
4.1500-2009+2008-2007+2006-.-5+4-3+2-1
5.1246000/250/89/8
6.(91*27*84*76)/(9*7*19*13)
7.189*190190-190*189189
2.20082008*2007-2008*20072007
3.5000-1-2-3-4-.40
4.1500-2009+2008-2007+2006-.-5+4-3+2-1
5.1246000/250/89/8
6.(91*27*84*76)/(9*7*19*13)
7.189*190190-190*189189
1,123+234+345+456+567+678+789
=100+200+300+400+500+600+700+20+30+40+50+60+70+80+3+4+5+6+7+8+9
=2800+350+42
=3192
2,20082008×2007-2008 ×20072007
= 20082008×2007 -(2008-1 +1)×20072007
=20082008×2007-2007×20072007-20072007
=(20082008-20072007)×2007-20072007
=10001×2007-20072007
=20072007-20072007
=0
3,5000-1-2-3-4.40
=5000-(1+2+3+4.40)
=5000-(1+39+2+38+3+37+4+36.+40)
=5000-(40×20+20)
=5000-(800+20)
=5000-820
=4180
4,1500-2009+2008-2007+2006.-5+4-3+2-1
=1500-(2009-2008+2007-2006.+5-4+3-2+1)
=1500-(1+1.+1+1+1)
=1500-1×1005
=1500-1005
=495
5,1246000÷250÷89÷8
=1246000÷(250×8×89)
=1246000÷(2000×89)
=1246000÷178000
=1246÷178
=7
6,(91×27×84×76)÷(9×7×19×13)
=(13×7×3×9×84×19×4))÷(9×7×19×13)
=(3×4×84)÷1
=1008
7,189×190190-190×189189
=(189+1-1)×190190-190×189189
=190×190190-190×189189-190190
=190×(190190-189189)-190190
=190×1001-190190
=190190-190190
=0
我为你做了很久哦,自己的作业都还没做,不要忘恩负义啊,一定要采我的 啊!
过程都是我自己一字一句码出来的
=100+200+300+400+500+600+700+20+30+40+50+60+70+80+3+4+5+6+7+8+9
=2800+350+42
=3192
2,20082008×2007-2008 ×20072007
= 20082008×2007 -(2008-1 +1)×20072007
=20082008×2007-2007×20072007-20072007
=(20082008-20072007)×2007-20072007
=10001×2007-20072007
=20072007-20072007
=0
3,5000-1-2-3-4.40
=5000-(1+2+3+4.40)
=5000-(1+39+2+38+3+37+4+36.+40)
=5000-(40×20+20)
=5000-(800+20)
=5000-820
=4180
4,1500-2009+2008-2007+2006.-5+4-3+2-1
=1500-(2009-2008+2007-2006.+5-4+3-2+1)
=1500-(1+1.+1+1+1)
=1500-1×1005
=1500-1005
=495
5,1246000÷250÷89÷8
=1246000÷(250×8×89)
=1246000÷(2000×89)
=1246000÷178000
=1246÷178
=7
6,(91×27×84×76)÷(9×7×19×13)
=(13×7×3×9×84×19×4))÷(9×7×19×13)
=(3×4×84)÷1
=1008
7,189×190190-190×189189
=(189+1-1)×190190-190×189189
=190×190190-190×189189-190190
=190×(190190-189189)-190190
=190×1001-190190
=190190-190190
=0
我为你做了很久哦,自己的作业都还没做,不要忘恩负义啊,一定要采我的 啊!
过程都是我自己一字一句码出来的
1.123+234+345+456+567+678+789
123+234+345+456+567+678+789+900=?
123+234+345+456+567+678+789+890+901=?
123+234+345+456+567+678+789+890+73874837487400+?
123+234+345-456+567-678+789-890怎么做这道题
123+234+456+567+678+789
123+234+345+456+567+678=?
123+234+345+456+567+678
123+234+345+456+567+678速算
计算123+234+345+456+567+678+789/12.3+23.4+34.5+45.6+56.7+67.8+
用简便方法计算:123+234+345+456+567+678+789急
计算:123+234+345+456+567+678+789=______.