六年级数学简便计算练习题答案

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六年级数学总复习简便计算练习题

一、口算。(10分)

10-2.65=7.35 0÷3.8= 0 9×0.08= 0.72 24÷0.4=60 67.5+0.25=67.75 6+14.4=20.4 0.77+0.33=1.1

5-1.4-1.6=5-3=2 80×0.125=80*81=10 73

÷3×71=73*31×71=49

1

二、用简便方法计算下面各题。(90分,4×20+5×2)

1125-997 998+1246 431+3.2+532+6.8 1252-(172+25

2

) 400÷125÷8 25×(37×8)

=1125-(1000-3) =(998+2)+(1246-2) =(431+532)+(3.2+6.8)=1252-252-17

2

=400÷(125*8)=25*8*37

=1125-1000+3 =1000+1244 =10+10=20 =10-172=875 =400÷1000=5

2

=200*37=7400

=125+3=128 =2244

(41

-61)×12 143×2154×74 34×(2+3413) 125×8.8 4.35+4.25+3.65+3.75 3.4×99+3.4 =(246-244)*12 =47×2154×74 =34×2+34×3413 =125*(8+0.8) =(4.35+3.65)+(4.25+3.75)=3.4*(99+1)

=242*12 =(47×7

4)*2154 =68+13 =125*8+125*0.8 =8+8=16 =3.4*100=340 =1 =1*2154=215

4

=81 =1000+100=1100

17.15-8.47-1.53 17

65-343-465 97÷251+115×92

0.125×0.25×32 22.3-2.45-5.3-4.55 =17.15-(8.47+1.53) =1765-465-343 =97÷511+115×92 =81*41

*32 =22.3-5.3-(2.45+4.55)

=17.15-10 =13-343=941 =97*115+115×9

2

=1 =17-7=10

=7.15 =(97+92)×115=11

5

(1211+187+245)×72 4.25-365-(261-143) 187.7×11-187.7 4387×21+57.125×21-0.5 3415 ×(57 -314 ÷3

4 ) =1211×72+187×72+245×72 =441+143-(365+26

1) =187.7*(11-1) =4387×21+5781×21-21 =3415 ×(57 -3

14 *34) =11*6+7*4+5*3 =6-6=0 =1887 =21(4387+5781-1) =1549*(57 -72

=66+28+15 =21*100=50 =1549*73=5

7

=109

2.42÷4

3+4.58×311-4÷3 212 ×6.6+2.5×635 1178 -613 -123 4.6+325 +635 +5.4 2.8+549 +7.2+359 445 -(245 +5

12 )

=2.42*34+4.58×34-34*1 =221*653+221*653 =1178 -(613 +123 ) =453+352+653+55

2 =(2.8+7.2)+594+395= 445 -245 -5

12

=34(2.42+4.58-1) =221*2*653 =1178 -8=387 =453+552+(352+65

3)=10+9=19 =2- 5

12 =1127

=34

*6=8 =10+10=20

438 +2.25+558 +734 725 +457 +235 53611 -1647 +16511 237 +359 -337 +149 +147 0.75+58 +14 +0.375 5-21417 -1317

=483+241+585+743 =725 +235 +457 =53611 +16511 -1647 =237 +147 -337 +(359 +149 )=43+85+41+83 =5-(21417 +1317 ) =483+585+(241+743)=10+457 =70--164

7 =74+5=574 =43+41+(85+8

3)=2 =5-4=1 =10+10=20 =1475 =537

3

45 +945 +9945 +99945 +999945 48.3-1516 -456 956 ×4.25+414 ÷6 0.625×0.5+58 +12 ×62.5% 3138 ×72513 ÷3138 1645 +(24

7

-1.8) =(1+9+99+999+9999)45 = 48.3-(1516 +456 )=965*441+441*61 =85*21+85*21*85 =3138 ÷3138 ×72513 =1645 +(24

7 -15

4)

=11107 45 =48103-20=28103 =(965+61)*441 =85*(21+21+1) =1×72513 =72513 =164

5 -154+247

=10*417=285 =1554+247 =1835

13

2.5×(910 +910 +910 +910 ) 22×34 +25×75%-7×0.75 0.25×6

3.5-14 ×1312 6715 ×2.5-212 ×4715 389 +3.125+119 +17

8

1125-996

=2

21*4*109 =22*43+25*43-7*43 =41*6321-41*1321 =6157*221-221*4157 =389 +11

9 +(381+178 )=1125-(1000-4) =25*4*109=10*109=9 =(22+25+7)*43=271 =41*(6321-1321) =(6157-4157)*22

1 =5+5=10 =1125-1000+4 =41*50=1221 =2*2

5

=5 =125+4=129

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