已翻译人教版小学五年级方程的意义

1、12x+50 x+x2xb-5?ositi ? tmini? ?氀歀氀? ?m氀si? ?iii氀? ?rimo?a? ?io氀 ?oii吠mi ?tim氀si? : ?im 50? ?r ?氀歀? ?氀 x (1)?im 5? ?氀? ?氀歀? ?氀 b (3)?io ?imoii? x2to吠m (2)341.?oii?t? ?1o1? ?a ?ioil?n . 2.?ioi?吠i氀? ?o1?1s?t? ?氀 ?oisioiiis ?ii. 3.?ioii?t? ?i歀tt? ?1i1? ?ti ?氀歀? ?olioi氀 ?ii ?tmot? ?oitii ?ioi歀? ? ?mm氀?

2、?氀歀? ?i歀tt? ?oitt ?ti ?ii . 5” 1 ?t?o “吠?吠i氀? 吠?吠i氀? ?ti ?1l1o1?6吠?吠i氀? ?1s?t? t?t歀氀i7100g100g?1i1 ?ioo氀r氀?i? ?i歀ii? 100?吠ii?1s?t?8100g?1s?t?9100g100+xitt? ii ?氀r氀?i? ?io1 ?i歀ii? ?吠ii 氀歀? ? ?氀r氀?i? ?ti ?io1 ?i歀ii? ?t? .xii ?氀r氀?i? ?io1 ?i歀ii? ?riino氀 10100+x100g100+x20050g100g100g?氀 ?it? ?吠iii? 1110

3、0g100g100g100+x100+x30050g100g100g100g?氀 ?it? ?吠iii? 12100g100g100g50g100+x?氀 ?it? ?吠iii? 1320505010050 x2=10050 x x18050+2180 80x x802x180克x x x10010030100x5050503x=180100+20100+30100+2x=50 x3 ?吠ii?吠ii?吠ii?吠ii ?吠ii ?吠ii1420+30=50 802 20+=100 3=180502=100 100+20100+5050+2 180 100+2=350?鮘守 ?鮘尌 : ?i 1

4、 ?oitim氀si? ti? ?i氀?ii?氀? ? ?mti ?吠mo氀 tmtn歀? ?t氀氀? ti? ?o?i?iio氀?ii?氀? ?i?i? ?it歀?i?15100g100g100g50g100+x250100+x uli ?守 ?退? ? ?0守 ?守 ?守 x100+=250?+?耀 ?+?耀 退r鮘r.?氀 ?it? ?吠iii? ?1s?t?161 ?i?i? ii tnnto ti?t? ? ? 氀ss1i1 ?mini? ?iit? ?ii i?i? ?氀?氀oiii?i? 1ii?t? 1tt? ?17x+5=18x3=93x+7=225(x-2)=15x+y=9

5、x+792+7=9x+32x+x+x=151 ?ioitim氀si? ?iti 1ii?t? ? 18(2)?+?耀 ? ?+?耀 退r尌 .( )(1) ?a+?耀 ? ?+?耀 退r尌 .( )3. l尌 ? ?+?耀 ? ? ?raa退l退? ?0守-?l守 ?退l退耀?守 ? ?鮘?l尌 .2. ?5a0? ? :19ti?t? ?ti ri?t? ?ioim氀si? ?oi?iai氀o1 ?rimo?a? ?i?i ?iii氀? trltim氀si? 1mi歀?.ti?t? ?t?t? ?ir?歀?ri?t? ri?t? ti?t? ?li歀? ?i?氀?氀o .ri?t?ti?t?

6、203?i 6? ?imi? r?is?r ?i吠a iiimi? ii歀iii ?imii?t? ?ioiim?氀s ?氀?i氀?irii? ?oitiit ?ti ?olii ?ti .?rimt 吠m1m? ?toi?t? 2?i ?i? ?iimi? ?氀?i? ?1? ?i氀 ?氀?i氀? ii 氀ss1i1 ?imii?t? ?ioiim?氀s ? ?i歀tt? ?oitiit ?ti 氀lii ii?吠m ?ii氀? i歀氀?ii?氀 ?tmot歀ii?氀? . ?im?io1 300ii? ?iimi? ? ri?io吠ii? ?i歀i氀?氀 ?imitsiti ?oiim?氀

7、s ? ?1歀t氀o ?oo氀 z、y、 xri?氀?氀 ?i氀r?m ?noiii ?1歀? ? ?oltim氀si? ?1tlt? ?imo氀?i ?i?r ? ?imo氀? ?ii?氀i ti?t? ?tmotirtl . 21 35- =12 ( ) 0.49 =7 ( ) y+24 ( ) 35+65=100 ( ) 5 +32=47 ( ) -14 72 ( ) 28 16+14 ( ) 9b-3=60 ( ) 6(a+2)=42 ( ) +y=70 ( ) 910?ilt: ?rimo?a? ?imitim氀si? ?i?氀 ?ti?t? ?氀 ti?t? ?tt? 22r?mi

8、rimo?a? ?i?im 1iig? ? 氀?iiiiig? ?氀oii? tmini? ” “?氀?氀i?氀” “ ?1? .氀歀? ti?t? ? ri?t? ?tt? . ( )1=0.4+0.6氀歀? ri?t? ? ti?t? ?tt? . ( ) 1= 0.4 36 a = 45 32 5.8 2 = 8 氀歀? 1ii?t? ?tt? ? 1ri?t? ?tt? . ( )氀歀? ti?t? ? ?ti ri?t? . ( )氀歀? ti?t? ?tt? . ( )?r?i ?ii ?ii歀氀?123（1） 6x + =78 （2） 36 + =42 ? ?鮘? ?aa守 ?r

9、a守 ?r?耀 ? ?耀?耀鮘耀?守 ?鮘? ?a0耀 ?耀耀?a .?l?a ? ?鮘尌 ? 退守 ?耀 ?ra守 退?+?耀 ?守?退退? ?+?耀 ?尌?+?耀 ?鮘耀24” ?+?耀 ? ?+?耀 ?+?耀 ? ?+?耀 “ ?鮘r 退?lu耀 ?吠ig? ?tt? ? ti?t? ?t?t? ?ir?歀?ri?t? ri?t? ti?t? ?li歀? ?i?氀?氀o .2550gxxx73166tmi?i ?吠i氀 ti?t? ? .26?鮘x3x=186186?鮘?鮘x?鮘x1.?+?耀 ?l守 ?耀 lil?r? ?耀?退? ?ra守 .27tr 35?o ?氀l? ? 吠moi

10、?i?911mi歀? . x (1)?io 3?iti571mi歀? . x (2)?im 3?o ?氀歀氀? ? 氀ii?氀?61mi歀? . x (3)tr ?rt歀?1.31mi歀? . x7.8?o (4)?rimo?a? ?io氀 ?oit?ai氀o1 ti?t? ?iii氀? ?tim氀si? .280.6x=31.2x=30 x+ y =48?ar?0耀 ?arl? ? lil?r? ?耀?退? ?+?耀 ?l守 ?鮘ra守 ? ?t?氀 ?m?氀 . x 2. ?氀? ?i歀t?1 ?i?si?a 氀g1roi歀 ?n氀i氀 ? iti ii t?t?氀1.2?imii?i?i

11、r ?im?氀?i?吠1l tnig1roi歀 ?iii氀? 30 ii?i?ir . to吠m ?n ?t? ?m?氀? ? ?irri? y to吠m ?n ?t? ?m?氀? ? ?氀1?i歀 ?吠i?m x 3. ?氀? ?r1a?ili歀ii ?t?48 to吠m ?n ?t? ?m?氀? .?r ? ?r?耀? ? l? ?l尌 0.6?鮘 ?退尌 ? ?守? 3?鮘 ?r? . x 1. ?鮘 ?守退?29开放题8=1202=1208= 48 = 32= 42= 38=120+48=120+38+4 =1208+3 =1208- 4 =1208- 3 =1208+2 =1208-

12、2 =1208+2 = 48+2 = 3?imi ii8、2、120、4、3 ?oinnto ?歀氀? ? ti?t? ? ?iin . 30xxx4 ? ?r?al?耀 ?退? ? ?l尌 +退 退守 ?+?耀.( ).x20+ (5)3?尌 ?+?耀.( ).x= 0 (4)?退? ? ?0守 ?守 ?守 ?+?耀 ?+?耀 退r尌 . ( ). (1)?退? ? ?0守 ?守 ?守 ?ra守 ?+?耀. ( ) (2)?+?耀 ?尌 ?+?耀 ?+?耀 ?尌 ?+?耀 .( ). (3)?a0? ? ?l守退? :31x50x2x = 50x73166x + 73 = 166?l ?l

13、?+?耀 ?耀 .325x=9 ?a鮘 95=x ?a鮘9x=5 40 x=18 ?a鮘 18x=40 ?a鮘4018=x3.?rimo?a? ?rimitit ?io氀 ii吠mi ?oi?iai氀o1 ti?t? ?iii氀? ?it歀t?iim氀si? ? (1)?a氀?il 5to吠m ?t歀t ?i?ai? ?t? 9? ?mi?t? ? 氀?吠mo1? iti ii ? . x ?t歀t氀rs1i1r x(2) ?1? ?ii歀吠i? 吠mioir1m 40氀rs1i1r ri?-r氀? ? ?1歀? ? ?imo氀?氀 ?i?r ? ? tot? 18 氀rs1i1r ?m歀氀

14、. 33 s=4212 ?a鮘 s42=12 ?a鮘 s12=42ii?ir ? ii 氀oil氀 tmi?i?氀 42 s(3)氀? ?氀? ?ti ? ?io?氀? ?iii氀? ii?ir ?t?i? ?ti 氀?氀 ? 氀?氀?12t?t?氀 ?i? 1mii氀 . 34 5.1=x4.75 ?a鮘 5.1x=4.75 ?a鮘5.14.75=x (4)ii ?iois ?i歀ii? 5.1氀oo? ? ii ?氀?1? ?ioi歀氀r 氀oo? ?1 氀r ?imis 4.75氀oo? rioi? . x?i歀ii?35 80a=45.4 ?a鮘 45.480=a ?a鮘 45.4a=

15、80(5)?io?ia氀?il ?ioi? 1 ?rim?氀? r? ?i?ili? ?i吠mi 80 ?吠a?ir ?1歀? ? r? ?ti ?n? 45.4? ? .a?mi1ls氀? ? iti ii ?吠a?ir r? ?ti 36探讨天平平衡的道理探讨天平平衡的道理?l耀 ?退+退a+?耀 ?尌? ?r耀?守 ?r?守 ?鮘尌 3738itt? ?rri? trs?it? ?rri? to吠m ?氀r氀?i? 吠mo氀? ? 吠?吠i氀? ?o1?1s?t? 1m氀 ?rri? trs?it? ?氀l? 1?im rto?tn 1nimo氀? ?39?rri? ?i?s?it? ?

16、imii ?oi?歀 吠mo氀?吠ai? ? 吠?吠i氀? ?o1?1s?t? 1m氀 ?ii to吠m rt?lt? ?ti ( 3 ) to吠m ?ioi?歀 ?i歀ii? ?氀l? .40?iori?t? ?rri? tmisiit? ii 氀?i吠a ?氀l? ii ?oo氀 吠mo氀l?(?r氀? 吠mo氀歀氀?) ? ? ? ?rri? ?siit? iot? ?t? 1mi歀? .41? ?aa?l?耀 1耀退 ?鮘? ? ?守 ?aa?l?耀 2?r ? ?退?a ?rl鮘 ? ?l耀 ?退+退a+?耀 退r?i鮘? ?42=ii ?i歀吠a ?ti tno氀 to吠m tro

17、i?ii ?ios? ?i歀ii? ?t? ? 43?a+?耀 ?aa守 ?al?耀 ?守 l尌 ? ?r?a耀鮘?a0a(?a鮘 0?r 尌 l尌 ? ?r?0尌 )? ?+?耀 ?鮘 ?a?a ?守 退r尌 . 44?ioii?t? ?i氀氀? ?i?11:?iori?t? ?rri? tmisiit? ii 氀?i吠a ?氀l? ii ?oo氀 吠mo氀l?(?r氀? 吠mo氀歀氀?) ? ? ? ?rri? ?siit? iot? ?t? 1mi歀? .?a+?耀 ?aa守 ?al?耀 ?守 l尌 ? ?r?a耀鮘?a0a(?a鮘 0?r 尌 l尌 ? ?r?0尌 )? ?+?耀 ?鮘 ?a?a ?守 退r尌 . 45ii to吠m 氀歀氀? ?ti tno氀 to吠m ?iooiis氀? ?i歀ii? ?t? ? 46260+ x =300- x?