六年级数学简便计算练习题-新修订

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1、1 六年级数学总复习简便计算练习题六年级数学总复习简便计算练习题 一、口算。(10 分)一、口算。(10 分) 102.657.35 03.8 0 90.08 0.72 240.460 67.50.2567.75 614.420.4 0.770.33=1.15 1.41.6=5-3=2 800.125=80*=10 3=*= 102.657.35 03.8 0 90.08 0.72 240.460 67.50.2567.75 614.420.4 0.770.33=1.15 1.41.6=5-3=2 800.125=80*=10 3=*= 8 1 7 3 7 1 7 3 3 1 7 1 49 1

2、 二、用简便方法计算下面各题。(90 分,42052)二、用简便方法计算下面各题。(90 分,42052) 1125997 998+1246 4+3.25+6.8 12(1+2) 4001258 25(378)1125997 998+1246 4+3.25+6.8 12(1+2) 4001258 25(378) 3 1 3 2 5 2 7 2 5 2 =1125-(1000-3) =(998+2)+(1246-2) =(45)+(3.2+6.8)=12-21=400(125*8)=25*8*37=1125-(1000-3) =(998+2)+(1246-2) =(45)+(3.2+6.8)=1

3、2-21=400(125*8)=25*8*37 3 1 3 2 5 2 5 2 7 2 =1125-1000+3 =1000+1244 =10+10=20 =10-1=8 =4001000= =200*37=7400 =1125-1000+3 =1000+1244 =10+10=20 =10-1=8 =4001000= =200*37=7400 7 2 7 5 5 2 =125+3=128 =2244=125+3=128 =2244 ()12 12 34(2) 1258.8 4.354.253.653.75 3.4993.4()12 12 34(2) 1258.8 4.354.253.653.

4、75 3.4993.4 4 1 6 1 4 3 15 4 7 4 34 13 =()*12 = 2 =34234 =125*(8+0.8) =(4.35+3.65)+(4.25+3.75)=3.4*(99+1)=()*12 = 2 =34234 =125*(8+0.8) =(4.35+3.65)+(4.25+3.75)=3.4*(99+1) 24 6 24 4 4 7 15 4 7 4 34 13 =*12 =( )*2 =68+13 =125*8+125*0.8 =8+8=16 =3.4*100=340=*12 =( )*2 =68+13 =125*8+125*0.8 =8+8=16 =3.

5、4*100=340 24 2 4 7 7 4 15 4 =1 =1*2=2 =81 =1000+100=1100=1 =1*2=2 =81 =1000+100=1100 15 4 15 4 2 17.158.471.53 1734 2 0.1250.2532 22.32.455.34.5517.158.471.53 1734 2 0.1250.2532 22.32.455.34.55 6 5 4 3 6 5 9 7 5 1 11 5 9 2 =17.15-(8.47+1.53) =1743 = =*32 =22.3-5.3-(2.45+4.55)=17.15-(8.47+1.53) =1743

6、 = =*32 =22.3-5.3-(2.45+4.55) 6 5 6 5 4 3 9 7 5 11 11 5 9 2 8 1 4 1 =17.15-10 =13-3=9 =* =1 =17-7=10=17.15-10 =13-3=9 =* =1 =17-7=10 4 3 4 1 9 7 11 5 11 5 9 2 =7.15 =()=7.15 =()= 9 7 9 2 11 5 11 5 (+)72 4.253(21) 187.711187.7 4357.1250.5 (+)72 4.253(21) 187.711187.7 4357.1250.5 ( ) 12 11 18 7 24 5 6

7、 5 6 1 4 3 8 7 2 1 2 1 3 3 4 4 1 15 5 5 5 7 7 3 3 1 14 4 3 3 4 4 = =7272+72 =47272+72 =4+1-(3+2) =187.7*(11-1) =4357 =+1-(3+2) =187.7*(11-1) =4357 =( *) 12 11 18 7 24 5 4 1 4 3 6 5 6 1 8 7 2 1 8 1 2 1 2 1 3 3 4 4 1 15 5 5 5 7 7 3 3 1 14 4 3 4 =11*6+7*4+5*3 =6-6=0 =1887 =(4357-1) =*=11*6+7*4+5*3 =6-6

8、=0 =1887 =(4357-1) =*( ) 2 1 8 7 8 1 15 495 5 7 7 7 2 =66+28+15 =*100=50 =*=66+28+15 =*100=50 =*= 2 1 15 49 7 3 5 7 =109=109 2.42+4.5843 2.42+4.5843 6.62.5 4.6+5.4 2.8+7.2+ (+) 4 3 3 1 12 21 1 2 2 6 63 3 5 5 1 11 17 7 8 8 6 61 1 3 3 1 12 2 3 3 3 32 2 5 5 6 63 3 5 5 5 54 4 9 9 3 35 5 9 9 4 44 4 5 5 2

9、 24 4 5 5 5 5 1 12 2 =2.42*+4.58-*1 =2*+4.58-*1 =2*62*6 =*6 =(+) =4+3+6+5 =(2.8+7.2)+5+3=+3+6+5 =(2.8+7.2)+5+3= - 3 4 3 4 3 4 2 1 5 3 2 1 5 3 1 11 17 7 8 8 6 61 1 3 3 1 12 2 3 3 5 3 5 2 5 3 5 2 9 4 9 5 4 44 4 5 5 2 24 4 5 5 5 5 1 12 2 =(2.42+4.58-1) =(2.42+4.58-1) =2*2*6 =*2*6 =8=3 = =4+5+(3+6)=10+9

10、=19 =2-+5+(3+6)=10+9=19 =2- =1 3 4 2 1 5 3 1 11 17 7 8 8 8 7 5 3 5 2 5 2 5 35 5 1 12 2 12 7 =*6=8 =10+10=20=*6=8 =10+10=20 3 4 3 +2.25+ + + + 0.75+ + +0.375 5-4 43 3 8 8 5 55 5 8 8 7 73 3 4 4 7 72 2 5 5 4 45 5 7 7 2 23 3 5 5 5 53 3 6 6 1 11 1 1 16 64 4 7 7 1 16 6 5 5 1 11 1 2 23 3 7 7 3 35 5 9 9 3 3

11、3 3 7 7 1 14 4 9 9 1 14 4 7 7 5 5 8 8 1 1 4 4 2 21 14 4 1 17 7 1 1 3 3 1 17 7 =4+2+5+7 =4+2+5+7 =+ =+ =+(+)=+ =+ =5-(+) 8 3 4 1 8 5 4 3 7 72 2 5 5 2 23 3 5 5 4 45 5 7 7 5 53 3 6 6 1 11 1 1 16 6 5 5 1 11 1 1 16 64 4 7 7 2 23 3 7 7 1 14 4 7 7 3 33 3 7 7 3 35 5 9 9 1 14 4 9 9 4 3 8 5 4 1 8 3 2 21 14 4

12、1 17 7 1 1 3 3 1 17 7 =4+5+(2+7)=10+=4+5+(2+7)=10+ =70- =+5=5 =+(+)=2 =5-4=1+5=5 =+(+)=2 =5-4=1 8 3 8 5 4 1 4 3 4 45 5 7 7 1 16 64 4 7 7 7 4 7 4 4 3 4 1 8 5 8 3 =10+10=20 =14 =53=10+10=20 =14 =53 7 5 7 3 + 48.3- 4.25+6 0.6250.5+ + 62.5% +(-1.8) 4 4 5 5 9 94 4 5 5 9 99 94 4 5 5 9 99 99 94 4 5 5 9 99

13、99 99 94 4 5 5 1 15 51 1 6 6 4 45 5 6 6 9 95 5 6 6 4 41 1 4 4 5 5 8 8 1 1 2 2 3 31 13 3 8 8 7 72 2 5 5 1 13 3 3 31 13 3 8 8 1 16 64 4 5 5 2 24 4 7 7 =(1+9+99+999+9999) = 48.3-(+)=9*4+4* =*+* =*4+4* =*+* = =+(-1) 4 4 5 5 1 15 51 1 6 6 4 45 5 6 6 6 5 4 1 4 1 6 1 8 5 2 1 8 5 2 1 8 5 3 31 13 3 8 8 3 31 13 3 8 8 7 72 2 5 5 1 13 3 1 16 64 4 5 5 2 24 4 7 7 5 4 =11107 =48-20=28 =(-20=28 =(9+)*4 =*(+1) =1+)*4 =*(+1) =1= =-1+ 4 4 5 5 10 3 10 3 6 5 6 1 4 1 8 5 2 1 2 1 7 72 2 5 5 1 13 3 7

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