Sách giáo khoa toán 3 tập 1 chân trời sáng tạo đã chuyển đổi

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TRAN NAM DUNG {Tong Cl u bién)

KHU C THANH CHIN H {Chu bién)

OINH THi KUAN DUNG — NGUYEN KIN H OEC

OINH THI KIM LAN — HtJYMH THI SIM TRANG

T$P M$T

Mai bdi hgc thLYdng cd cdc phbn sou:

Cung hoc fim t6i, khom phs:i, duo voa kidn th fc

at hinh monh kidn thac moi.

Thuc honh cdc kién thñc. la ndng d ph6n Cung hgc.

Luy?n top vd vdn dung ki4n thu'c. ki ndng via hgc.

Mdt sb ki hiéu khâc One cfdng trong sâch:

Bqn ong vui v6 ggi 'y..hodc ldm 'm6u.

Khdm phd’ nfi‹3ng vdn a4’ m”di lien quon all.kidn thñc v‹4o hgc.

: ThU Jhd ch’ v . phdt 6ién ning.’! c.tadn hgc.

Gidi mi9u m‹2tsd dia donh:v,o oio"tri i!Ch”s‹3 - vdn hoo cda aât nuac.

Cac hoqt ding mom khdo iqo thém co h@i giup hgc sinh kdt ndi

kién th‹ic ctd hqc vdi mdc t‹6n cudc s6ng.

Cdc l‹2nh you c6u viét dugc mdc hién t én bdng con hodc ›8 b&i tdp.

Ldl ndl ddu

C6c em hoc sinh th6n mgn!

Bu’dc song lip 3, cdc em dd Id'n hon vd mong mu in

hidu bidt nhieu Mn,

Soch TO 9 cñng ch0a dg'ng nhieu noi dung md mé v0 thu

! hmm. Chang hgn, c6c em c6 th6 tinh todn sâ sdch

hdng chuc nghln cu6n trong the vi4n: cAc em bfgt do

nhigt d6 trong

Id'p hoc, bigt Minh chu vl phbng h cdc em c6 thd th6ng L4

chldu coo c0o cdc bqn hpc sfnh trong Id'p:

S6ch Tadu3 s8 gidp cdc em tg' tim t0i, khdm ph6 v6

hoc t6p m§t cach sdng two theo ning Iu'c cuo minh.

@ tzu'd'ng, em hgc Todn cGng bgn bé vd thdy co. Q

nhd, em chio sé nhfi'ng diéu dig hoc v0'i nguc/i thin de tim

hiéu vé cuoc sdng xung quonh.

Sdch Tom 3 nhu' ngcfb'i bgn thdn thigt qiup cdc em bigt yéu

thuonq moi ngu''i vd hiAu th4m vg dbt nu'd'c Viét Nom tuoi dep.

Chic cdc em mdi ngdy dgn tru'dng Id m6t ngdy vui.

›. 6s T vA ed suns......................................................s

in top cdc so dén 1000.................................................................................7

On tbsp phép c nq, phép trñ'........................................................................9

Cong nhom, tru' nhom..................................................................................11

Tim sd hgng..................................................................................................12

Tim so L'! trñ', tim sd tr0'..............................................................................13

On t8p phép nh6n........................................................................................14

in hip phép chio.........................................................................................15

Tim thñ‘o sd.................................................................................................17

Tim sd b! chio, Um sd chio..........................................................................18

Em ldm du'oc nhñ'ng gi?.............................................................................19

Mi-li-mét................................................................... ........,.................................21

Hinh tom gidc. Hen h t0' gldc.......................................................................23

Kh6i h6p chñ' nh6t. Khdf Up phuwng ,...„,.,.,.„„.............„.. ,.........................25

X6p hinh......................................................................................................26

Xem ding hd............................................................................................28

Bdi todn gidi b6ng hoi bu'b'c tfnh.. ................. ........_,................................30

Ldm quen vc/i bi/u thD'c..............................................................................32

Tinh gi6 tri cdo bidu th¿c ,........„..„.„....... ...,.,., ....,.....,.,......,..,..„....,............33

Tfnh gid tri cdo bigu thñ‘c {tigp theo)...........................................................34

Tinh gi6 tri cuo bidu the ‹up theo)...........................................................35

Ldm tr6n sd.................................................................................................36

Lom quen vdi chñ‘ sd Lo Md........................................................................38

Fm Idm ‹su'oc nhñ'ng gi?...............,.........................,...........................................„.. .29

Thu'c hdnh vb trdi nghiâm: Ldm hdp bdt tñ' v6 h6p dd quo s0' dung.........40

2. PH#P NHAN, PH/P CHI A TRDNG PHAM VI 1OOO.................41

Bang nhon 3................................................................................................42

B6ng chio 3..................................................................................................43

Bong nhdn 4................................................................................................44

Bong chio 4..................................................................................................45

M6t phdn hoi, m6t phdn bo, met phdn tu', met phdn ndm...........................46

Nh6n nh6 m, chio nhdm.......................................,...................................._......48

Em Idm duo'c nh0'ng gi?.............................................................................49

Nhdn vd'i so co mot ch0' sd trong p hgm vi 1000.......................................50

Nh6n vé'i s6 c6 mot ch0' sd trong p hgm vT 1000 (tiép theo).....................51

Phép chio het v0 phép chio c6 du’..............................................................53

Chia s6 cd hoi ch0' sd cho sd cd met chfi' sd..............................................55

Em Idm duo'c nh0'ng qT* ................................................................................57

Bong.............................................................................................................59

Bong chia 6..................................................................................................60

Gdp met sd I6n met s6 I&n .......... .......................,.............................,............., 61

Bdng nhdn 7......................................... ..... ......., ..„....................................62

Bong chio 7..................................................................................................63

Bong nhdn 8.................................................................................................64

B6ng chio 8........................................................................................6S

Gt6rn m6t s6 di m6t ed l6n.................................................................66

Bong nhdn 9................................................................................................67

Bong chio 9..................................................................................................68

Em Idm du'oc nhu'ng gi?.............................................................................69

Xem ddng ho...............................................................................................71

Chis ed c6 bn chti s6 cho ed cd mñt chfi s6.......................................73

So sdnh s6 ldn gdp mdy Sdn sd bd.................................................................76

Oiém cr giDo. Trung diém cdo doqn thong..................................................77

Hinh tron...................................................................................................................79

Nhi§t d . Do nh!ét d6..................................................................................81

PM IBM @U*O'0 Uh Uq @i? .........+............,...............,...,..................................+...+...........................................2

Thus hdnh vd troi nghiém: Gib' gidc — Thbi tiet.........................................84

IN TCP HoC Ki 1.................................................................................8d

Thu'c h6nh v6 tr6i nghiém: Bo khodng cdch bang bu'd'c ch6n...................95

B6ng thudt ngfi'............................................................................................99

.*. don vi = 1 chuc .?. chuc = 1 tram

•!

3 .”*. i . ?. .?. .?.

Viet so: .?.

Viét theo mdu.

Viét so Nhon h tong c oc trdm, chuc, do'n vi.

Mo u: 729 = 700 + 2O + 9

Viet so: . ?.

• 641

b) Viét tong fhonh so.

Mo r . 200 + 80 + 3 = 283

• 900 + 6O + 3

Tra cho‘i Ai nhonh fto‘n ?

830

• 100 + 1

Ha i n ho m h oc sinh, moi nh om bon ban th u'c hién h oi nhiém vu:

• Mo i ba n trong nho m viét m ot s o the a yéu cou cua gioo v i en.

Vi du: Viet s6 tron chuc co ba ch? s d.

• Moi nhom sop xep bon so vñ‘o viet thea thLf tLr ter bé de’n Ibn.

Nhorn no o hot n th o nh dun g vet n han h thi du’oc co IUp vo toy

kh en thu'é ng.

7

Hang ’ Hon g

Trdm I Chuc Oo'n vi ci “Chuc

Lom theo mou.

Bon from boy mu'oi lom 475 400 + 70 +

5

Hai trdm bo mu'di mdit .*. .?.

.?. 814

500 + 4

a) b) c)

185 285 1385 .?.

’ ” —— * I 372”

3s2

!

34"

45 I ?. ?.

a} 27 hay

33?

58

5

t392 23 78

422 .?. ' .?.

b) 280 hay 320?

10 20 30 dO TOO 300 400 500

Cdu noo dung, câu noo soi?

a} 621 gom 1 trom, 2 c hu c vo 6 don •!

bt 621 gom 6 trñm, 2 chuc vo 1 don v! .

c) 162, 216, 612, 621 lo coc so du'o'c sip xep theo the’ tu' th' bé den I6'n.

.S6?

Lém theo mbu.

22 + 15 = .?.

15 + 22 = .?.

37-15=.I

37 - 22 = .?.

o) 20, 90, 70

b T€ 9, 5

O§t tinh rdi

tinh. o} 204 + 523

Tinh.

a) t5 + 6 + 5

b). 61 + B29 c) 347 - BO

c) 29 + 5 + 6

Em noi vé’ phép c ng, phép tr0"vdi 0.

Vi du: Hop thñ"nhdt cé 12 cdi bao, hip thu' hai khâng co cdi keo noo.

Co hqi hop cJ 12 + 0 = 12 coi keo.

N°u:

Tom tdt

27 bon

d0 + 30 = 7G

30 + a0 = 70

70-a0=J0

7s-30=40

B i vbn nghé tru'bng em c6 27 bon nG' vd 15 bon nom. H6i dci vdn ngh truong

em co boo nhiéu bon?

Nom:

J5 bon ? bgn

Tom tit

Tfi 1:

To 2.

M oi to m it sou phu ho'p v@i boi toon noo?

Bo i foén 1: Mai vo Minh co

tdt co 20 cot nhon vé', trong

do Moi co 8 CC i. HOOII Minh

co baa nhiéu cdi nhon vé'?

Tom tot A

20 coi

Bñ i toa n 2: Mai co 20 cñ i

k hau tran g. Mt nh co it ho'n

M

Mai 8 coi. Hoi Minh co bao

Tom tot B

B cdi 20co

nhiéu céi khou trom g? Minh: ? co i

18 coy

To \ trong du’oc 1B coy, to 2 Frong du'oc

25 coy. Hoi t6 2 tr6ng du' c nhiéu ho'n to 1 boo nhiéu c6y?

* Q uansot hinh onh du‘oi dñy, gi up b on t irn cau tré I i

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