1313 / 1616 + 3 / 5
>,<,=
1313/1616+3/5........................131313/161616+9/15
1313/1616 + 3/5 = 131313/161616 + 9/15
G= (1313/1414+10/160)-(130/140-1515/1616)
G = \(\left(\dfrac{1313}{1414}+\dfrac{10}{160}\right)-\left(\dfrac{130}{140}-\dfrac{1515}{1616}\right)\)
= \(\left(\dfrac{13}{14}+\dfrac{1}{16}\right)-\left(\dfrac{13}{14}-\dfrac{15}{16}\right)\)
= \(\dfrac{13}{14}+\dfrac{1}{16}-\dfrac{13}{14}+\dfrac{15}{16}\)
= \(\dfrac{1}{16}+\dfrac{15}{16}=1\)
Tìm x:
a, (1313+ 1616 ) .2x2x+ 2x+12x+1= 212212+210210
b, (1212- 1616) . 3x3x+ 3x+23x+2= 316316+313
1111+1212+1313+1414+1515+1616 / 2020+2121+2222+2323+2424+2525 =?
\(\frac{2323+1313+1414+1515+1616}{4141+2222+2323+2424+2525}\)
=\(\frac{8181}{13635}\)
> , < , =
1313/1717.... 13/17
161616/202020.... 5/6
1414/1818.....7/8
1212/1616..... 1515/2424
1313/1717=13/17
=>1313/17 = 13/17
161616/202020 =16/20=4/5=24/30 ;5/6=25/30
=>161616/202020 <5/6
Bài 5:
a,1111+1212+1313+1414+1515+1616/2020+2121+2222+2323+2424+2525
b,5.4:0,4x1420+4,5x780x3/3+6+9+12+.....+24+27
c,7,2:2x28,6+1,43x2x64/2+2+4+6+10+16+...110
11+22+33+44+55+66+77+88+99+1010+1111+1212+1313+1414+1515+1616+.........+20162016=?
Rút gọn các phân số sau
a ) 55 66 ; b ) − 33 88 ; c ) 2020 8080
d ) − 2121 − 4242 ; e ) 130130 − 260260 ; f ) 1616 − 1313
a ) 5 6 b ) − 3 8 c ) 1 4
d ) 1 2 e ) − 1 2 f ) − 16 13
1313/1717 ..... 13/17 161616/202020 ....... 5/6
1414 ..... 7/8 1212/1616 ........1515/2424
1313/1717 = 13/17 161616/202020 < 5/6
1414 > 7/8 1212/1616 > 1515/2424
chúc bạn học tốt! ^_^
phần dưới cùng là cái underline đấy, ko phải dấu = đâu