六年级数学简便计算练习题答案.doc

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1、六年级数学总复习简便计算练习题 一、口算。(10分)10 0 0 9 2460 6 =5-3=2 80=80*=10 3=*=二、用简便方法计算下面各题。(90分,42052)1125997 998+1246 4+5+ 12(1+2) 4001258 25(378)=1125-(1000-3) =(998+2)+(1246-2) =(45)+(+)=12-21=400(125*8)=25*8*37=1125-1000+3 =1000+1244 =10+10=20 =10-1=8 =4001000= =200*37=7400 =125+3=128 =2244()12 12 34(2) 125 9

2、9=()*12 =2 =34234 =125*(8+) =(+)+(+)=*(99+1)=*12 =()*2 =68+13 =125*8+125* =8+8=16 =*100=340=1 =1*2=2 =81 =1000+100=1100 1734 2 32 =(+) =1743 = =*32 =(+)= =13-3=9 =* =1 =17-7=10= =()=(+)72 3(21) 11 43 () =7272+72 =4+1-(3+2) =*(11-1) =4357 =(*)=11*6+7*4+5*3 =6-6=0 =1887 =(4357-1) =*()=66+28+15 =*100=5

3、0 =*=109+43 + + (+)=*+-*1 =2*62*6 =(+) =4+3+6+5 =(+)+5+3= -=(+) =2*2*6 =8=3 =4+5+(3+6)=10+9=19 =2- =1=*6=8 =10+10=20 + + + + + 5-=4+2+5+7 =+ =+ =+(+)=+ =5-(+)=4+5+(2+7)=10+ =70- =+5=5 =+(+)=2 =5-4=1=10+10=20 =14 =53+ - +6 +% +(=(1+9+99+999+9999) = (+)=9*4+4* =*+* = =+(-1)=11107 =48-20=28 =(9+)*4 =*(

4、+1) =1= =-1+ =10*= =15+=18(+) 22+2575%-7 + 1125-996=2*4* =22*+25*-7* =*63-*13 =6*2-2*4 =+(3+)=1125-(1000-4)=*4*=10*=9 =(22+25+7)*= =*(63-13) =(6-4)*2 =5+5=10 =1125-1000+4 =*50=12 =2*=5 =125+4=129(111+999) 56(-) -(50-) + 45(+ 897%+104 =110+(1+999)/(56-56)=49*-49 =+*+ =45*(+-) =897+104 =(110+1000)(24-

5、21) =49(10-) =(+1) =45*+45*-45* =(897-1+104)=1110* =49*10=495 =*11=7 =35+12-27=20 =(896+104)=1000=375( + 72156-5672 2532125 70999+709 299101=*(5-5) =3*1+1*2+3* =72*(156-56) =25*(8*4)*125 =709(99+1) =0 =(3+2+3)* =72*100 =25*8*(4*125) =709*100 =(+2+)* =7200 =200*500=100000 =70900 =(+2+)*563999 7199 37

6、55+2996 8439+1001 446+295 888+999 2100202+6 99+ +54 +% =2*6+2*6 =*(99+1) =*+* =*+*8+ =(+)=2(6+6) =*100 =(+)* =(+1) =7-5=2=2*12 =7530 =10* =*2=*=33 =371161 155 +3+6+ 4+5+7 4 6=11-(6+1)=15-(4+5)=(+)=+(3+6)=4+5+(2+7)=(*4) =6/=11-8 =3 =15-10=5 = =10+10=20 =10+10=20 =10= =6*4=243 + + 18(+) 7+5 ()(24)=3-(

7、+) =(+) =*+* =18*+18* =*(7+5) =*24-*=3-1=2 = =*+* =2*4+3*5 =*12 =2-=1 =+= =8+15=23 =2*4=8(+) (+) 7+5 () ()1511 12103450075 =(+1)* =/(+) =(7+5) = *(*) =*165+*165=1 =*+*65 =2*4=8 =*= =2*11+3*15 =+13=16 =22+45=67(3217) (25) (2121) (99)9 =(8+17)* =25*4+*4+ =(+1) =21(+)* =99*+* =*=25* =100+3+ =2*=1 =21*=5 =11+=11 =1=5*12=60 =103 () ()30 3 4 5841=/(*+*) =*30+*30 =+3*2 =1- =4-(+) =*(58+41+1)=/(+) =25+24=49 =6 = =4-1=2 =*100=12=/=*= () 235 - 13518 153 53 ()=- =+(*) =/(*) =*(153-53)= =*2=1 =/=*5=4 =*100=3*20=6010 - - + 25 =10-(+)+=25* =(+)=10-1+ =6 =9

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