七类数学中相似分数概念的例题

相似分数的数值相等。

类似的:

“2/3 = (2 xx2) / (3 xx2) = 4/6 '

“2/3 = (2 xx5) / (3 xx5) = (10) / (15)

“2/3 = (2 xx8) / (3 xx8) = (16) / (24)

“2/3 = (2 xx9) / (3 xx9) = (18) / (27) '

' 2/3 = 4/6 = (10) / (15) ' ' = (16) / (24) = (18) / (27)

因此，我们可以通过分子和分母乘以相同的数字来获得任何数量的分数。

同样地，如果分子和分母除以相同的数，我们会得到相似的分数。以下是一些例子:

”(40)/(60)=(40÷2)/(60÷2)= (20)/ (30)'

”(40)/(60)=(40÷4)/(60÷4)= (10)/ (15)

”(40)/(60)=(40÷10)/(60÷10)= (4)/ (6)'

”(40)/(60)=(40÷20)/(60÷20)= (2)/ (3)'

”(40)/ (60)= (20)/ (30)= (10)/ (15)= 4/6 = 2/3 '

样品的问题

问题1:通过将2和3相乘，得到下列各2个相似的分数。

2/3, 3/2, 5/9, 2/5, 2/7, 3/7,“(5)/(11),(5)/(13)、(3)/(11)’,‘(5)/ (21)

答:“2/3 = (2 xx4) / (3 xx4) = (8) / (12)

“2/3 = (2 xx5) / (3 xx5) = (10) / (15)

答:“3/2 = (3 xx4) / (2 xx4) = (12) / (8) '

“3/2 = (3 xx5) / (2 xx5) = (15) / (10) '

答:“5/9 = (5 xx4) / (9 xx4) = (20) / (36)

“5/9 = (5 xx5) / (9 xx5) = (25) / (45)

答:“2/5 = (2 xx4) / (5 xx4) = (8) / (20) '

“2/5 = (2 xx5) / (5 xx5) = (10) / (25)

答:“2/7 = (2 xx4) / (7 xx4) = (8) / (28)

“2/7 = (2 xx5) / (7 xx5) = (10) / (35)

答:“3/7 = (3 xx4) / (7 xx4) = (12) / (28)

“3/7 = (3 xx5) / (7 xx5) = (15) / (35)

答:“5/11 = (5 xx4) / (11 xx4) = (20) / (44)

“5/11 = (5 xx5) / (11 xx5) = (25) / (55)

答:“5/13 = (5 xx4) / (13 xx4) = (20) / (52)

“5/13 = (5 xx5) / (13 xx5) = (25) / (65)

答:“3/11 = (3 xx4) / (11 xx4) = (12) / (44)

“3/11 = (3 xx5) / (11 xx5) = (15) / (55)

答:“5/21 = (5 xx4) / (21 xx4) = (20) / (84)

“5/21 = (5 xx5) / (21 xx5) = (25) / (105) '

问题2:得到相似的分数除以2。

2/4, 6/8,(12) /(10)’,‘(20)/(30),(40)/(60),(4)/(10)’,‘(16)/(40),(20)/(100)、(14)/ (44),(8)/ (20)'

答:“2/4 =(2)÷2)/(4÷2)= 1/2”

答:“6/8 =(6÷2)/(8÷2)= 3/4”

答:”(12)/(10)=(12÷2)/(10÷2)= 6/5”

答:'(20) /(30) =(20÷2)/(30÷2)= (10)/ (15)

答:”(40)/(60)=(40÷2)/(60÷2)= (20)/ (30)'

答:(4) /(10) =(4÷2)/(10÷2)= (2)/ (5)'

答:”(16)/(40)=(16÷2)/(40÷2)= (8)/ (20)'

答:'(20) /(100) =(20÷2)/(100÷2)= (10)/ (50)

答:(14) /(44) =(14÷2)/(44÷2)= (7)/ (22)

答:”(8)/(20)=(8÷2)/(20÷2)= (4)/ (10)'

类似的分数

样品的问题