一條數學題~
回答 (10)
2008-01-03 8:18 pm
30除以2分之1等於:
30x2=60
再:60+10=70
60
+10
-------
70
一條式:
(30x2)+10
--------------
......1......
‘30除以二分之一再加上10等於70’
30x2=60
再:60+10=70
60
+10
-------
70
一條式:
(30x2)+10
--------------
......1......
‘30除以二分之一再加上10等於70’
2008-01-03 7:44 pm
30 / 1/2 + 10
= 30 x 2 + 10 (分數除數, 將除數倒轉, 由除1/2, 變成乘2/1, 即乘2)
= 70
= 30 x 2 + 10 (分數除數, 將除數倒轉, 由除1/2, 變成乘2/1, 即乘2)
= 70
2008-01-03 7:38 pm
30 除 1/2 + 10
=30 * 2 + 10
=60 + 10
=70//
=30 * 2 + 10
=60 + 10
=70//
2008-01-03 7:37 pm
30
____
1/2
when 1/2 putting on top, the demonitor need to reverse, i.e. 30 x 2 + 10
The answer: 70
____
1/2
when 1/2 putting on top, the demonitor need to reverse, i.e. 30 x 2 + 10
The answer: 70
2008-01-03 7:33 pm
30除以二分之一再加上10
=70
=70
2008-01-03 7:33 pm
10又1 over 60
收錄日期: 2021-04-14 17:54:57
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