Dane są rozwiniecia dziesietne liczb a i b: a=4,(1) i b=3,(7)
Znajdź rozwiniecie dziesiętne liczby a-b
1. 4,111... = x /*10
41+ 0,111... = 10x
41+ x = 10x /-x
41 = 9x /:9
x= 41/9=4 całe i 5/9
2.3,777... = x /*10
37+0,77... = 10x
37 + x = 10x /-x
37 = 9x /:9
x = 37/9=4 całe i 1/9
Nie jestem pewny na 100% tego zadania.
a = 4,(1) = 4,111...
x = 4,(1)
10x = 41,1
--------------
9x = 37
x = 37/9
a = 37/9
b = 3,(7)
x = 3,(7)
10x = 37,7
------------
9x = 34/9
b = 34/9
a-b = 37/9 -34/9
a-b = 3/9
a-b = 1/3
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1. 4,111... = x /*10
41+ 0,111... = 10x
41+ x = 10x /-x
41 = 9x /:9
x= 41/9=4 całe i 5/9
2.3,777... = x /*10
37+0,77... = 10x
37 + x = 10x /-x
37 = 9x /:9
x = 37/9=4 całe i 1/9
Nie jestem pewny na 100% tego zadania.
a = 4,(1) = 4,111...
x = 4,(1)
10x = 41,1
--------------
9x = 37
x = 37/9
a = 37/9
b = 3,(7)
x = 3,(7)
10x = 37,7
------------
9x = 34/9
b = 34/9
a-b = 37/9 -34/9
a-b = 3/9
a-b = 1/3
=========