{[(+4/25)+36/13]-[7/26+4/9]}÷105/22×21/11
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{[(+4/25)+36/13]-[7/26+4/9]}÷105/22×21/11
![{[(+4/25)+36/13]-[7/26+4/9]}÷105/22×21/11](/uploads/image/z/19401538-58-8.jpg?t=%7B%5B%28%2B4%2F25%29%2B36%2F13%5D-%5B7%2F26%2B4%2F9%5D%7D%C3%B7105%2F22%C3%9721%2F11)
把{[(+4/25)+36/13]-[7/26+4/9]}÷105/22×21/11 先化简为
(4/25+36/13-7/26-4/9)x22/105x21/11
=(4/25+72/26-7/26-4/9)x2/5
=(4/25+65/26-4/9)x2/5
=(4/25-4/9)x2/5+65/26x2/5
=(4/25-4/9)x2/5+1
=97/225
(4/25+36/13-7/26-4/9)x22/105x21/11
=(4/25+72/26-7/26-4/9)x2/5
=(4/25+65/26-4/9)x2/5
=(4/25-4/9)x2/5+65/26x2/5
=(4/25-4/9)x2/5+1
=97/225
42÷14/15= 13/21÷26/27= 35/36÷14= 11/12÷11/36= 33/35÷22= 4/9÷
5分之21÷7×9分之5 2分之15×4÷7分之25 4分之1×9分之26×13分之4
找规律:1、4、9、16、()、36、49 ;25、3、22、5、19、7、()、()、13、11
3,4,5,6,7,8,11,12,13,14,15,16,17,18,21,22,23,24,25,26,27,28,
巧算此题巧算 (85×105×117×22)÷(5 ×7×9×11×13×15×17)
找它们的规律:7 4 9 2 11 16 9 13 22 20 24 25
15/25 - 7/4 ÷ 1/8 × 13/26
找规律 4 9 2 7 10 15 8 13 12 21 14 22 25
找规律1/4,3/9,7/16,13/25,21/36
1/4,3/9,7/16,13/25,21/36第五个是多少?
几道数学题,麻烦各位一、28÷4/7=? 25/36÷5/72=? 5/8÷20=? 4/5×5/8=? 9/22×11
1 3 6 10 15 21 28 2 5 9 14 20 27 4 8 13 19 26 7 12 18 25 11