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1? ?? 20.7 1.9 72.8 42.42 0.05 6.3 1 1/12 13

2? ??

(1) ??

(2) ??

(3) ??

(4) ??

3? ??

0.563.68+6.320.56 7.810.1

=0.56(3.68+6.32) = 7.8(10+0.1)

=0.5610 = 7.810 + 7.80.1

=5.6 = 78.78

4? ????

(1)24??=0.24?

650.242.5=39 (???)

52539= 20475 (?) ???

(2)6004-80=70(??/?)

???

????? (???????????12?) ?1440? 5? ??? ????1, 2, 3, 4 ????2, 4, 6, 8 ????3, 6, 9, 12 ????4? 8 12 16 . ?n??n, 2n 3n 4n ?100??100? 200, 300, 400 ?? 1000 P10-11 1? ??0.12 0.96 2.25 2.1 2.3 50 5/6 0.16 1/2 2? ?? (1) 15+2a 15h2=7.5h (2) ??1 7 3 (3)1/4 10 10/13 13 3? ?? B A B D 4? ??? ????(85 + 83 + 53)2 =158 (????) ?? 853=120 (????) 5? ????

(2)(40+60)842=4200 (???) 5.54200= 23100 (?) ??? (3)1- 1/5- 5/12 = 23/60 ??? P12-13 1? ??6.72 3.7 107.1 0.096 3 0.3 2.5 1 0.406 2? ?? (1)? ? (2)a b (3)145 14.5 1450 14.5 145 0.0145 3? ??? X=5 x=3.6 x=1.1 4? ???? (1) ?????????x???????3x? 3x+x=160 4x=160 X=40 3x=3*40=120 ??? (2) ??????????x?? 2.5(28+x)= 150 28+x = 60 X = 32

(3) ??????????x?? 76(2.8+x)=762.8 + 444 X = 1.523 4-2.8 1.523 ??? (4) ???x?????????31? 2 n-1=31 N=5 ??? ???????????EFCO??? (10-4+10)22=16 (????) P14-15 1? ??92.4 0.2 1.16 7 0.5 0.99 4.6 0.902 2 2? ?? (1)2/7 7/12 (2)5x (3)4a a2 (4)3x+2 3x+2=41 (5)1.1 1.08 3? ???? 287.1 8.9 4? ????

(2) 495(100-1)=5(??) (3) ??1/4 ? 1/4 ? 1/2 (4) 160 8 4 = 80 (?) 5? ??? 3/16 P16-17 1? ?? 13.27 0.18 0.72 0.56 0.75 50 3/4 7/12 7/10 2? ?? (1)52cm 92 ???? (2)7/8 8/8 (3)76 96 (4)1/7 2m 3? ?? (1)B (2)A (3)C 4? ??? X=0.49 x=7.15 x = 4.2 5? ???? 8.579 5.14375 6? ???? (1)??????????x?

??????2015?????????????

???2015????????????? P4-5 1? 6.9 0.72 0.007 1 0.3 1.6 0.5 4/7 1 2? (1)10.26 (2)1/8 5 (3) 50 3770 (4)1.17 1?1/12 3/4 40 (5)450-m+n 3? B C C C 4? (1)25.5&pide;2.5=10(?)0.5(??) ??????11?????? (2)???????????x???????????2.6x? X+2.6x = 360 3.6x = 360 X = 100 2.6x=2.6*100=260 ??? ?300&pide;5-35=25(?) (3)????????x???????????2x?? 2x+X = 450

3x = 450 X = 150 2x=2*150=300 ??? ?????????x??????(x+12.5)????(x+X+12.5-25=2x-12.5) ? (x+12.5)+x+(2x-12.5)=130 4x = 130 X = 32.5 ??x+12.5=32.5+12.5=45 ??2x-12.5=2*32.5-12.5=52.5 ??? ???? P6-7 1?1 32.36 10.8 0.45 506 0.4 3.4 0 10/19 2? (1)12? 4? (2)3/4 0.7 1 (3) 12 (4)??? ? (5)4 24 3????? 3.8×2.5×0.4 0.5×12.5×8×0.2

=3.8×(2.5×0.4) =(0.5×0.2)×(12.5×8) =3.8×1 = 0.1×100 =3.8 = 10 4????? (1)3.8×180&pide;3.6=190(?) ??? (2)0.16×75= 12 (??) ??????????????????0.16*? = (??) (3)????? 10×4 + 10×1.6&pide;2=48(???) ???? 0.15 × 4 8= 7.2 (??) ??? ???? ????????64????????????4?? ??????????????????? 8 ?; ?????????????(????)???? ?? 2? ?12??? 24? ????????????????????4??6???24? ???? 64-8-24-24=8(?) P8-9 1? ?? 20.7 1.9 72.8 42.42 0.05 6.3 1 1/12 13 2? ?? (1) ?? (2) ?? (3) ??

(4) ?? 3? ?? 0.56×3.68+6.32×0.56 7.8×10.1 =0.56×(3.68+6.32) = 7.8×(10+0.1) =0.56×10 = 7.8×10 + 7.8×0.1 =5.6 = 78.78 4? ??? (1)24??=0.24? 65×0.24×2.5=39 (???) 525×39= 20475 (?) ??? (2)600&pide;4-80=70(??/?) ??? (3)???;???????? ????? (???????????12?) ?1440? 5? ??? ????1, 2, 3, 4 ????2, 4, 6, 8 ????3, 6, 9, 12 ????4? 8 12 16 . ?n??n, 2n 3n 4n

?100??100? 200, 300, 400 ?? 1000 P10-11 1? ??0.12 0.96 2.25 2.1 2.3 50 5/6 0.16 1/2 2? ?? (1) 15+2a 15h&pide;2=7.5h (2) ??1 7 3 (3)1/4 10 10/13 13 3? ?? B A B D 4? ??? ????(8×5 + 8×3 + 5×3)×2 =158 (????) ?? 8×5×3=120 (????) 5? ???? (1)0.75×25×4=75 (?) ??? (2)(40+60)×84&pide;2=4200 (???) 5.5×4200= 23100 (?) ??? (3)1- 1/5- 5/12 = 23/60 ??? P12-13 1? ??6.72 3.7 107.1 0.096 3 0.3 2.5 1 0.406 2? ?? (1)? ? (2)a b (3)145 14.5 1450 14.5 145 0.0145

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2014?????????????????????2014?7?12?(???)?8?31?(???)?????7??2??????????????????????????????????????????????????????????????????????????????????!

???????????(40———49?)

40?——41?

??? 1.???????????????? 2.?????????? 3.???(?????) ??? 1.?????? ???(?)?(?)? ??(?)? (?)?(?)? (?)?(?)? (?)???(?)?(?)????(?)?(?)? (?)?(?)? ?(?)?? ??(?)? (?)??? (?)?(?)? 2.????????(??)(??) ??(??)( ??) ??(??)( ??) ??( ??)(??) 3.?????1??????????????????2?.....????????? ???? ? ???? ? ???? ??? 1.(???????????????) 2.? ??? 3.? ? ?? 4.? ?? ??? 5.? ? ?? 6.? ????

42?——43?

??? 1. ???????????????????????????????????:????;?????????????????????????????????? 2.?????????(????????????????????????????????????????????????????????????????????) 3.????????????????????????, ?????, ???????????????????? ??? 1.???????? ?(??)(??)(??)(??) ?(??)(??)(??)(??)?(??)(??)(??)(??)?(??)(??)(??)(????) 2.????????? (?)??? (?)???(?)??? ?(?)???(?)?? ?(?)?? ??(?)? ???(?) ??(?)? ?(?)?(?) ?(?)?(?)?(?)?(?) 3.???? ? ? ? ; ? , ?? , , , (?? ?? ?? ?? ?? ?? ?? ?? ?? ???? ??) ????????????????????????????

44?——45?

??? 1.???(?????) 2.????(??????????????????????????????????????????????????) ??? 1.????????????????( A) 2.???????? ??? ??? ??(??) (??) ??(??)(??)??(??) (??) 3.????????(D) ??? 1.???? 2.????

3.???? 4.???? 5.???? 6.???? 7.????

46?——47?

??? 1.??(??) ??(??) ??(??)(???) ??(??) 2. ????????

????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 3.?????????????(???????????????????????????????) ??? 1.???(?????) 2.????????? ?? ?? ?? ??(??????) ?? ?? ?? ??( ??) ?? ?? ?? ??(????)?? ? ?(??) ??? 1.?????????(???) 2.???????????(???) 3.???????????(???) 4.?????????????(?????)

48?——49?

??? 1.????????????????????????????????????????????????????????????????????????????????? 1.???? (?)(?)?? (?)(?)??(?)(?)?? (?)(?)?? (?)(?)?? (?)(?)?? 2.??????? ????? ??? ????? 3.?????? ????? ????? ?????? ??? ? ? ? ?

50?

??? 1.?? ??? ?????? 2.(?) (?) (?) (?) ??? ??——1.(??) 2.(??) 3.(??) ??——1.(??) 2.(??) 3.(??)

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