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BÀI THI GIAO LƯU TOÁN TUỔI THƠ CẤP HUYỆN LỚP 5, NĂM HỌC 2013 - 2014 Phần thi cá nhân; thời gian làm bài: 30 phút Họ và tên: ........................................................................ ........................................................ Trường Tiểu học:....................................................................... Số báo danh: .......... (Học sinh làm bài trên tờ giấy này) Câu 1: Hiện nay trung bình cộng tuổi của hai anh em là 9. Sau 3 năm nữa, tuổi em bằng tuổi anh. Vậy hiện nay anh ..................... tuổi. Câu 2: Phân số lớn nhất trong các phân số , , , là: …….....…. Câu 3: Chỉ ra một phân số sao cho: < < . Đáp số: = …….....…. Câu 4: Để số 46a34 chia hết cho 9 thì phải thay a bằng chữ số ........................ Câu 5: Viết số thập phân thích hợp vào chỗ chấm: 1m 2 2cm 2 = .....................m 2 Câu 6: Một thửa ruộng hình chữ nhật có chu vi là 180m. Tính diện tích thửa ruộng đó, biết rằng nếu giảm chiều dài 10m và giữ nguyên chiều rộng thì ta được thửa ruộng hình vuông. Đáp số: ........................m 2 Câu 7: Từ 4 chữ số 0, 1, 2, 3 có thể lập được bao nhiêu số thập phân bé hơn 1 mà mỗi số đều có 4 chữ số và có đủ mặt các chữ số đã cho? Điểm ............ ............ .... Chữ kí giám khảo:

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BI THI GIAO LU TON TUI TH CP HUYN

LP 5, NM HC 2013 - 2014

Phn thi c nhn; thi gian lm bi: 30 pht H v tn: ................................................................................................................................ Trng Tiu hc:....................................................................... S bo danh: ..........(Hc sinh lm bi trn t giy ny)Cu 1: Hin nay trung bnh cng tui ca hai anh em l 9. Sau 3 nm na, tui em bng tui anh. Vy hin nay anh ..................... tui.Cu 2: Phn s ln nht trong cc phn s , , , l: ......

Cu 3: Ch ra mt phn s eq \s\don1(\f(a,b)) sao cho: < eq \s\don1(\f(a,b)) < . p s: eq \s\don1(\f(a,b)) = ......

Cu 4: s 46a34 chia ht cho 9 th phi thay a bng ch s ........................ Cu 5: Vit s thp phn thch hp vo ch chm: 1m2 2cm2 = .....................m2Cu 6: Mt tha rung hnh ch nht c chu vi l 180m. Tnh din tch tha rung , bit rng nu gim chiu di 10m v gi nguyn chiu rng th ta c tha rung hnh vung.p s: ........................m2Cu 7: T 4 ch s 0, 1, 2, 3 c th lp c bao nhiu s thp phn b hn 1 m mi s u c 4 ch s v c mt cc ch s cho?p s: ......................s.Cu 8: Tnh tng: + + + + . + + . p s: ......................Cu 9: Lp 5A c 30 hc sinh, trong s hc sinh thch hc mn Ting Vit, s hc sinh thch hc mn Anh Vn, s cn li thch hc mn Ton. Hi lp 5A c bao nhiu hc sinh thch hc mn Ton?p s: .. hc sinhCu 10: Tnh: 10 0,4 0,7 0,6 0,3 0,2 0,9 0,1 0,8.p s: .

Cu 11: Tch ca 10 s t nhin lin tip bt u t 1 c tn cng bng bao nhiu ch s 0? [[

p s: ........................Cu 12: Tm s t nhin a nh nht sao cho khi chia a cho 2 d 1, chia cho 5 d 1 v chia ht cho 9.

p s: a = ........................Cu 13: Tng ca mt s t nhin v mt s thp phn l 25,8. Nu b du phy s thp phn th tng s l 87. Tm s thp phn ?

p s: .

Cu 14: Tng s hc sinh khi lp 5 nu xp hng nm hay hng chn u tha 1 bn. Nhng nu xp hng hai th va p i hnh. Hi khi 5 c bao nhiu bn? (bit rng s hc sinh khi 5 t hn 100 bn).

p s: ..................bn.Cu 15: Khong thi gian t u thng ti ngy sinh ca Lan gp 3 ln khong thi gian t sau ngy sinh ca Lan n cui thng. Hi Lan sinh vo ngy no, thng no?p s: Ngy ..........., thng ..................

Cu 16: (T lun)Giao lu Ton Tui th cp Tiu hc huyn Thch H nm hc 2013-2014 c 31 i tuyn tham gia, mi i c 6 em hc sinh. Bit rng s hc sinh n d thi nhiu hn s hc sinh nam d thi l 3 em. Hi c bao nhiu hc sinh nam d thi, bao nhiu hc sinh n d thi?

Bi gii......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... BI THI GIAO LU TON TUI TH CP HUYN

LP 5, NM HC 2013 - 2014

Phn thi ng i; thi gian lm bi: 20 pht H v tn hc sinh: .............................................................................................................. Trng Tiu hc:.......................................................................... S bo danh: ........... (Hc sinh lm bi trn t giy ny) s 1:Tnh bng cch thun tin nht:a. 27,32 + 36,23 + 45,14 15,14 6,23 + 22,68......................................................................................................................................................................................................................................................................................................................................

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b.

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BI THI GIAO LU TON TUI TH CP HUYN

LP 5, NM HC 2013 - 2014

Phn thi ng i; thi gian lm bi: 20 pht H v tn hc sinh: .............................................................................................................. Trng Tiu hc:.......................................................................... S bo danh: ...........(Hc sinh lm bi trn t giy ny) s 2:Tng ca hai s bng 792. Mt trong hai s c ch s tn cng bng ch s 0. Nu xa ch s 0 th ta c hai s bng nhau. Tm hai s cho?Bi gii

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BI THI GIAO LU TON TUI TH CP HUYN

LP 5, NM HC 2013 - 2014

Phn thi ng i; thi gian lm bi: 20 pht H v tn hc sinh: .............................................................................................................. Trng Tiu hc:.......................................................................... S bo danh: ...........(Hc sinh lm bi trn t giy ny) s 3:Trong mt tun bn Mai hc 5 tit Ton v 2 tit Th dc. Bit rng trong 4 tun tng thi gian bn Mai hc Ton v Th dc l 17 gi 20 pht; thi gian hc 1 tit Ton nhiu hn 1 tit Th dc l 10 pht. Hy tnh thi gian hc 1 tit Ton v thi gian hc 1 tit Th dc.Bi gii

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BI THI GIAO LU TON TUI TH CP HUYN

LP 5, NM HC 2013 - 2014

Phn thi ng i; thi gian lm bi: 20 pht H v tn hc sinh: .............................................................................................................. Trng Tiu hc:.......................................................................... S bo danh: ...........(Hc sinh lm bi trn t giy ny) s 4:Mt ming t hnh ch nht c chu vi bng 170m. Bit rng nu gim chiu di 5m, tng chiu rng 5m th din tch ming t tng thm 20m2. Tnh din tch ming t ?Bi gii

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BI THI GIAO LU TON TUI TH CP HUYN

LP 5, NM HC 2013 - 2014

Phn thi ng i; thi gian lm bi: 20 pht H v tn hc sinh: .............................................................................................................. Trng Tiu hc:.......................................................................... S bo danh: ...........(Hc sinh lm bi trn t giy ny) s 5:Trong cuc giao lu Ton Tui th, bn bn Chi, Bo, Phc, Hnh t bn gii: gii Nht, gii Nh, gii Ba, Gii Khuyn khch. Trong cc cu sau, mi cu ch ng c mt bn.

a. Chi gii Nh, Bo gii Ba.

b. Chi gii Nht, Phc gii Nh.

c. Hnh gii Nh, Bo gii Khuyn khch.

Hy xc nh gii ca mi bn.Bi gii

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BI THI GIAO LU TON TUI TH CP HUYN

LP 5, NM HC 2013 - 2014

Phn thi ng i; thi gian lm bi: 20 pht H v tn hc sinh: .............................................................................................................. Trng Tiu hc:.......................................................................... S bo danh: ...........(Hc sinh lm bi trn t giy ny) s 6:

1. Tnh bng cch thun tin nht:

+ + + + + + +

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2. Tm y:

105,8 y = 2,47 + 85,6

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