1.7 有理数的混合运算-2019-2020学年七年级上册初一数学【名师学案】(湘教版)

!"#$%&' ! !" (%()*+,- #! !!! !!' ! /L$4WXYZ ! 6789:%;< ! =>?@A " """"""""""""""""""""""" " " " " " " """""""""""""""""""""""" " " " " " # ## # " !! #@2(»ª¥¤ÒÓ8 ' ¬¤ ! Þc ! ! ® ¤ ! Þé ! ! 豤 ! µÓ ! " ij#é� ! ¬ ��é�êÛ(¥¤ ! $ !"# # ! %0-*OPKL #! !"#\®Jå@cSY-. " ' # '( " 0$ # 4 </ )( " #0$ # =/ *( " #0$ 4 # </ +(#0 " &</ # 6 $! ! $%#, " ij # qJ 4. " 0$ # $ </; " " # '(0#6 )(#6 *($% +($4 &! !"#\ $ qJå@c % -. " ! # '(0& $ 0&<& )( " 0$ # $ .$ $ *(0& $ . " 0& # $ +(0$ $ 0$ $ 4! !"#\& $ qJSv-. " # # '(0 " 0& # $ ;% )( " 0# # $%#/ . " 0# # $%#6 ;0#.# *(060$<6;04<6 +(4= # $ <$;4<# /! qJ #0$ & < " 0& # O " " # '(0$3 )(0$& *($# +($/ 6! Î� qJ ) " # #" /<$ # <& $ ; ! (, ! < ! 1 ! ; ! 1, ! * " $ #- 40 " 0& #. $ <$; ! " 2/% # * 5* ! ; ! 0 * 5* ! ; ! 215* ! ; ! 13 ! * " & # /0 " &<$ # $ ;/0 ! ) * ! ;/0 ! %) ! ; ! $%( ! ! 3! qJ ) " # # 0 ( 03.# ( .&0$= " 0 # & #* - $ a� 4$)/%/)4%! " $ #" 0$, # = " 06.4 # . " 0# # </ * - $ a� 4 " $*3 # 6 " $* # / " $+ # 4(2$+41! " & #" 0$ # $ <$. " 0$ # & =4 * - $ a� 425*$36243$*4)! " 4 # 0# 4 0 # 6 < - $0 " 0& # $ . ! - $ a� 4$($ ( ) 5 " *$1 # 4$($ ( ) 5 " $0 # 4$(/ 0 ) 4 ( ) ! $ !"# $ ! KB%0-KLMbc=dKL ,! \â " 4<$/< # $ 0 & #% . $ # / " ;#%%< # $ 0 & #% . $ # / ;/%0&%.4% &>-®Jb. " ! # '( �uÒÓbd�uå�b )( �uÒÓbd]kb *( �uå�bd]kb +( ]kbd6uå�b 7! >]ÖñuqJ ! " # # 34< " 0#$,% # .34<##4%.&3<$,$ * - $ a� 4025 " $(*3,/((2,/(2( # 4025( 402 " $ #" 06 # $ < " # $ 0 # & # ! - $ a� 4%)5 " ( * $ ( % # 4(3$(* 4) %%%%%%%%%%%%%%%%%%%%%%%% & & & & & & & & & %%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % % % ! !! Z[Dg3à»ÁÂ> ! !! #! ±{|ÁÂ,- # 4ì#å+ÒÇ¡¢% �J " !! $! ��W.+�%ÁÂ,-� # Ã9:»gR? �ÁÂÊ/×ÁÂ,- # ü�QbÁ & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & ! *+BC)%0D ,-BC?EF #" !!! #%! !"qJ& $ å@rSv-. " ! # " '(&6< # $ 0 # # & ;6 )(4< " 0& # $ .6;4$ *( " 0$ # & " 0#&= 0 # # $ ;4$ " +(0 & # 4 -" < 0,. $ # & 0 # . & ; $& 4 ##! qJ ) #70 " 0$ # < -" 0#$ # 03 . -8c " # # '(0# )(0#7 *(#7 +(43 #$! !"