(1) 7+79+799+7999+79999(2) 26/(13/2)/(2/15)请列出计算步骤
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(1) 7+79+799+7999+79999(2) 26/(13/2)/(2/15)请列出计算步骤
(1) 7+79+799+7999+79999
(2) 26/(13/2)/(2/15)
请列出计算步骤
(1) 7+79+799+7999+79999(2) 26/(13/2)/(2/15)请列出计算步骤
1.原式=(8-1)+(80-1)+(800-1)+(8000-1)+(80000-1)
=88888-5
=88883
2.原式=26/13*2/2*15
=2*15
=30
(1) 7+79+799+7999+79999
=(10-3)+(80-1)+(800-1)+(8000-1)+(80000-1)
=10+80+800+8000+80000-3-1-1-1-1
=88883
(2) 26/(13/2)/(2/15)
=26*(2/13)*(15/2)
=30
(1)7+80+800+8000+80000-1-1-1-1
=88880+7-4
=88883
(2)26/(13/2)/(2/15)
=26/13*2/2*15
=26/13*15
=30
7+79+799+7999+79999=88883
26/(13/2)/(2/15)=30
(1) 7+79+799+7999+79999
=(10-3)+(80-1)+(800-1)+(8000-1)+(80000-1)
=88883
(2) 26/(13/2)/(2/15
=30
7+79+799+7999+79999=8+80+800+8000+80000-5=88888-5=88883
26/(13/2)/(2/15)=26/13 *2 /(2/15)=2*2 /(2/15)=2*(2 /2)*15=30
(1)7+79+799+7999+79999
=7+80-1+800-1+8000-1+80000-1
=7+80+800+8000+8000-4
=88887-4
=88883
(2)26/(13/2)/(2/15)
=26*(2/13)*(15/2)
=26*(15/13)
=30
(1) 7+79+799+7999+79999
=7+80+800+800+8000-4
=88883
(2) 26/(13/2)/(2/15)
=这一题没看明白啥意思,呵呵
7+79+799+7999+79999
=3+79+1+799+1+7999+1+79999+1
=3+80+800+8000+80000
=88883
26/(13/2)/(2/15)
=26/ 13/2 / 2/15
=26*2/13 *15/2
=4*15/2
=30
7+79+799+7999+79999=7+(80-1)+(800-1)+(8000-1)+(80000-1)=88887-4=88883
26/(13/2)/(2/15)=(26*2*15)/(13*2)=30