①(1234567+2345671+3456712+4567123+5671234+6712345+7123456)/7
来源:学生作业帮 编辑:百度作业网作业帮 分类:数学作业 时间:2024/05/08 17:24:36
①(1234567+2345671+3456712+4567123+5671234+6712345+7123456)/7=?
②(1+1/2)x(1+1/4)x(1+1/6)x...x(1+1/10)x(1-1/3)x(1-1/5)x...x(1-1/9)=?
②(1+1/2)x(1+1/4)x(1+1/6)x...x(1+1/10)x(1-1/3)x(1-1/5)x...x(1-1/9)=?
第一题
=(1111111+2222222+3333333+...+7777777)/7
=(1111111*(1+2+3+...+7))/7
=1111111*28/7
=4444444
第二题
=(3/2*5/4*...*9/8*11/10)*(2/3*4/5*...8/9)
=3/2*2/3*5/4*4/5*.
=11/10
=(1111111+2222222+3333333+...+7777777)/7
=(1111111*(1+2+3+...+7))/7
=1111111*28/7
=4444444
第二题
=(3/2*5/4*...*9/8*11/10)*(2/3*4/5*...8/9)
=3/2*2/3*5/4*4/5*.
=11/10
①(1234567+2345671+3456712+4567123+5671234+6712345+7123456)/7
(1234567+2345671+3456712+4567123+5671234+6712345+7123456)除以7
(1234567+2345671+3456712+4567123+5671234+6712345+7123456)÷7你
计算:(1234567+2345671+3456712+4567123+5671234+6712345+7123456)
(1234567+2345671+3456712+4567123+5671234+6712345+7123456)/ 2
(1234567+2345671+3456712+4567123+5671234+6712345
填上适当的加减乘除及括号使算式成立 1234567=71 2345671=71 3456712=71 4567123=7
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