Tiết 98 - Bài 15 - Tìm một số khi biết giá trị một phân số của nó

1 Trêng PTDT néi tró Mï cang ch¶i GV: Nguy n Nh Ho ngễ ư à 2       =⋅ 4x. 11 8 b) =       =⇒    =⇒      ⋅=⇒    ⋅=⇒    =⇒    =⇒ 3 TiÕt 97 Ngêi so¹n: §ç ThÞ Minh Anh Trêng THCS Lª Quý §«n CÇu GiÊy – Hµ Néi 4     =⋅  Tr¶ lêi  !" !#$%&'($)*∈+, x 5 3 ⋅ 45 3 5 27 5 3 : 27 x =⋅== -$%&'(!. !" ⇒ !" !#$%&'($)    !" !#$%&'($)/"0 12$%&'(!.3" 4 !" 5 5 3 5 67! 8"9!#".:"; " *<"∈+ ,  "  "   n m :ax = 1!#:";  n m *<"∈+, 5 =$ =  89>! ?@A"B%!<C D"; =$"B%!  3";>!E"$/9$BF";:";";! >0 12>")! ?@BF!3" 4$"B%!5 =  GH;I GBF";"B%!@JD";! & A">$) >! *"; =  =   =− ⇒!#>:";=$ =  ->! ?@BF! *$===  = = =  = =⋅= K 3" E"L)3@M&M"@N";" O3";!M!!P 9 <   <(0 =⋅ 4,87,2: 3 2 B. = !#".:";< 3 2 =<   <Q0 = 3,5 - 7 3 1 . 5- A. = 7 50 )5(: 7 10 C. − =− !#".:";R    R<  = RS0 = TU"L)3! V! O3";!M!!P y x a ⋅ 8"!#! 3B%!*<∈+<≠= "  0… … y x 8" 0$O@." P"L%& P"0…… ;MW& P"!#9! 3B%! !8"9!#".:";*<"∈+<"≠= "  0… … n m n m :a 8" $O…… *<∈+, b a :c 9!#".:";! b a 9<X!#".:";<   S/"("@J@Y& Z&" " B 006,0 500 2 . 1,5% 5 2 . 1,5 ==  [3[</"("@J@Y& Z&" @N"; 5 <  == < ==  <X   < =⋅== 3";\!.<X]0" $BF";\3";9 ! <:";$BF";]3";! \")$); GH;I !.<X!#$BF";\3";! $);0 -$BF";\3";! $) ==*; ===  <X == [...]... thø nhÊt b¹n ®äc 5 Ngµy thø hai b¹n ®äc 8 1 sè trang 3 sè trang cßn l¹i Ngµy thø ba b¹n ®äc nèt 90 trang Hái: Cuèn s¸ch cã bao nhiªu trang? 128, 131 (SGK – Trang 55) 128, 134, 135 (SBT – Trang 24) TiÕt 98 14  . =⋅ 4,87,2: 3 2 B. = !#".:";< 3 2 =<   <Q0 = 3,5 - 7 3 1 . 5- A. = 7 50 )5(: 7 10 C. − =− !#".:";R    R<  = RS0. A">$) >! *"; =  =   =− ⇒!#>:";=$ =  - >! ?@BF! *$===  = = =  = =⋅= K 3" E"L)3@M&M"@N";". lêi  !" !#$%&'($)*∈+, x 5 3 ⋅ 45 3 5 27 5 3 : 27 x =⋅== - $%&'(!. !" ⇒ !" !#$%&'($)   