2024小学奥数精讲精练三年级含答案.pdf

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18、-=f*,1i J!oc 7J 4ij:1JB175-f-*,Z:1:-tl!U-pg:1:-tl!Re Jg 120-=f*,1iJ!Jg1JEf1 60-=f*o J!Ll:k$kA l:f3:1:-tl!.U pg:l:-tl!-3 ffl T$y I j B1?4.-tlt!Jm,bA l:f3:1:-tl!JEU 7.fil$JE-Mf*-7j(o MrfflfJE,1$1JB1 1ii 55-=f*,rlfi 3 1JEf1;7j(Jm ffiH-JE,tffifr4ij:1JB1 l:tf$Y1ri 40-=f*,rKi 6 1JB1,Mrin l:tJtinKY-=f*?28

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38、11j 0-6X6 -20-32 4+32-24X2-E A H B D 2-F C G 0-0-J .-2 0 1 D 4 A C 2 B 3 53 ABCD l=fEB 41 0 0 -16Xl6 -2 -2 0-2-:-2 2 -2 -2 2-2-2 0-0 A 128(-tf Jm B D 8(-tf J11-C-54 ftj 0 0 -2 8-6-90-0 -0 I I 55 0-0-0 0 56 f1J-ff fr%,i:tta 3 mr*J-wt1t-IE fr%,*H iif f/q:1:110 T 24 f fr Jm*o-lf1f%ffimYf1fJm*?o OOfJrff

39、e:$5t-ff1f%,JK-ff1f%ffi f/q 24 f1f Jm*,i:3 Jm*,EHlrtPJJtiliJ!-ff1f%s-ffo-ff1f%s-ff:24-;-3=8(Jm*)-ff1f%s:8-3=5(Jm*)-ff1f%Bffif/t:8X5=40(f1f m*):-ff-Jr%ffif/t 40 fnm!*o-1.-ff-Jr%,:l:ja 2 J*,5g)t:5t T IE1f%,iiff/t:l:ja 18 f-Jr II*;-ffy2Jm*sm1tTIE-Jr%,ffimYl4fnm!*o-ff1f%2.-ff1f%BirY 5 Jm*,iiffJg)ty 50 f

40、nm!*;tr-ff:1:JJD 7 Jm*,ffi f/qg)t:l:JJa 42 fnm!*o*-ff-Jr%iiff/tYf-Jr)*?3.-ff1f%-ff 25 Jm*,O*tty 4 Jm*,1U-ff-Jr%ffif/t*-*o*-lf1f%ffimYf1fm!*?4.-lf1f%-lf 30 Jm*,O*t:1:1JD 12 Jm*,1U-lf1f%iiff/t*4Afo*-ff1f%ffimY1fm*?57-(18+2)-2-36+4Xl0+2X8-92(.1*).t _%-18-10 2-0 0 -58 .=(t I(J-.-1.%.:J:E:,.A FJIJ J.J it

41、j -2 10X4 0-0-1 0 0 59 flj 7-0 0 -(6+1)-2-6-60 A B G E D H F C 1 ma-1JWJ*=c 20+12)x2 2 ma_JWJ*:(20X2+12X2)X2 3 ma_JWJ*:(20X3+12X3)X2 (20 xl2+12Xl2)x2-768(J.17 0 2.73 0 -,t J=1*1102801f 0 *2802 560X2-560(1J)-11.20(1J)112ox2-2240(1J)T-0 0-l3r r!J-*-!J 280-y-y,A.,l =-t J=1.-=-1 J=1 !IT,t J=J.-3c1 T 200

42、-*,-0-(1):WI,Jtir 1-J-74 1tj I -70+10-160(1)0 25+10-101-0 35(1)-70(-i)80(-i)0+J l 3cX:1JDIT 0 101-I I -0 0 75*I I I -0-*-:(15-110)+7 27X2 -12x2-24+3-,-0 r-I I I 1 10-1.1f-0 2.1f-*-2*-0 76 frj -1145 -(1+4)-229(1145-229-916(0(1-lf+1)-)tl/0 -0 0 -0-=f 320./lE 77 -(1+2)-70(jc)-115(jc)210(jc)0 0-2.78 -0-

43、520(Jjc)(1+3)-130(7J:JG)130-20-llO(Jjt)130X3-390(Jjc)0 0-J:ft.,r=t 0 79 330+1:o-450(-=f)-(2+1)150-120-150(-=f Jl)-30(-=f)-0 4.EJ3 80 ftj 33 40-3-4 -(1+2)-33(-11(11+4-15(,R)40-15-25()0-0 0 0 81 11J 0;j:572 -(10+1)52Xl0-520 -52 0-0 0 0 0 82 11j 128 -(1+7)-16X7-112 0 0 16-0 0 0 0 0 83 -960 -(5-1)-240(j

44、c)240X5(1ff-l)-1200(jc)0-0 jc)0-1350 Jl 0 84 0 11J IThl*1p-W3fsJ1j-*#tto 1JOPttsJAttlriJEttABJ 4 1irY 15 A,1JOPttsJAttlrtJEnttBJA$24 Ao 1JOPtt 5frf WE ttBJ?tJlLl:ff$YA?1m 1JDPttBJAttWEnttABJ 41ifY 15 A,iJt!W$1JDPttBJ.A1Jo_t 15 AiE:tff$1JOWEnttABJ 41if o$:bDWE tteJA:(24+15)-;-(4-1)=13(A)$:boP ttBJA:1

45、3x4-15=37(A):1JDJJjcP tt5frllrtJEnttBJ?tJlLl:ff 37 A5frl 13 Ao-1.1JrJf1J$tcpttfx1 tt!ipeJ 2 ffy 250 fl,tcp tttcp$t1W 1000 f!o tcp 5frl!cp)tJlLlt1W$Yf!?2.Ji5tJrLl-tU:,Jtq:if4tt ttt$290*,Hf4tt ttt$BJ 4 ffy 10*o f4tt5frlt$45?tJlLl:ff$Y*?3.$*131 EI tt*3t;$150 x,EI 13tI tt*3 st 41ff Hi$3 x o$*BJ EI5frl*3

46、?tJl1J:ff$Yx?4.&b$:ff If-ZM#rl*o lfl#rl*ttZ#rl*31BJ 21ifrri$120 Imo B lfl#rl*ttZ#rl*$380 Tm,If-ZM#rl*?tJlLl:ff$YTm?85 -0,(4-1)-20(TJl)-24(-f4Jl)-soc TJl)-60(TJl)0 0-7 86.,b a:t rm.tl/,o 191J 1f EJ3,GT#JmE-=f,EJ:ImE-=fffi:IGm 3 tf o o*M.EJ3mr:pJtRte 24-=f 5l,M.G mr:p*ili 6-=f sl,Mm,urIIElo EJ3,G Mm1*

47、5tJJU1fifJ5r$Y-=f5l?M.EJ3 m r:p*te 24-=f sl,M.G 11 r:p*te 6-=f sl,M ll*tl r I_;_ 0 iJt EJ3 llttG$24-6=18(-=f sl)o G llJffi:1f:187(3-1)=9(-=f 5l)EJ3 mJffi:1f:9X3=27(-=f 5l):EJ3,6Mm1*5tJJU1fifJ5r 27-=fslfl:19-=fslo-1.1fMf&ti,m-*18*,mf&iE:10*o Mf&tiJ=PJiE:&Fo,m*UriE:&f&31iro m-f&fl:lm f&ti5tJJU*tlr$Y*?

48、2.1fM;tt;fp,-tt-$6*M+t;fp?tJJUffl 2*Fo,-:tt;fp iE:&BJ 31iro fl:l+t1P1*5tJJU1f$Y*?Jffi:1f Jt r:p*ili 70 5EJ!JJUA0 J!Bt,1Jt JtI1J 3 1:fr,1Jt fl:l1JJffi:1f Jt?tJJU:3/g$y5E?4.Wil ri I_;_ PJ t_xf-,M.EJ3 ffi r:p*lli 7 mt,6 ffi r:p:if!A 19*FL,J!at 6 ffi txf-t BJ mt EJ3 ri 3 1ir O EJ3 GM ffi)$1f txfl5t3JU 7

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