六年级数学简便计算练习题答案

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=1.15－1.4－1.6=5-3=2      80×0.125=80*=10       ÷3×=*×=

二、用简便方法计算下面各题。（90分，4×20＋5×2）

1125－997             998+1246           4+3.2＋5+6.8          12－(1+2)        400÷125÷8      25×（37×8）

=1125-（1000-3）   =（998+2）+（1246-2） =（4＋5）+（3.2+6.8）=12-2－1    =400÷（125*8）=25*8*37

=1125-1000+3       =1000+1244            =10+10=20                =10-1=8             =400÷1000=  =200*37=7400          

=125+3=128        =2244

(－)×12         1×2×        34×(2＋)       125×8.8        4.35＋4.25＋3.65＋3.75        3.4×99＋3.4

=（－）*12     =×2×         =34×2＋34×    =125*（8+0.8）   =（4.35+3.65）+（4.25+3.75）=3.4*（99+1）

=*12              =（×）*2      =68+13             =125*8+125*0.8   =8+8=16                     =3.4*100=340

=1                   =1*2=2          =81               =1000+100=1100

17.15－8.47－1.53         17－3－4        ÷2＋×         0.125×0.25×32        22.3－2.45－5.3－4.55

=17.15-（8.47+1.53）     =17－4－3       =÷＋×        =**32               =22.3-5.3-（2.45+4.55）

=17.15-10               =13-3=9           =*＋×          =1                      =17-7=10

=7.15                                         =（＋）×=

(＋+)×72      4.25－3－(2－1)      187.7×11－187.7     43×＋57.125×－0.5       ×(－÷)  

=×72＋×72+×72   =4+1-（3+2）     =187.7*（11-1）      =43×＋57×－        =×(－*）

=11*6+7*4+5*3            =6-6=0                   =1887               =（43＋57-1）             =*(－）

=66+28+15                                                             =*100=50                      =*=

=109

2.42÷+4.58×－4÷3       ×6.6＋2.5×      －－       4.6+++5.4        2.8++7.2+         －(+)

=2.42*+4.58×-*1        =2*6＋2*6     =－（+）  =4+3+6+5    =（2.8+7.2）+5+3= －-

=（2.42+4.58-1）           =2*2*6            =－8=3       =4+5+（3+6）=10+9=19            =2- =1

=*6=8                                                             =10+10=20

  +2.25++        ++        －+        +－++       0.75+++0.375        5--

=4+2+5+7    =++        =+－        =+－+（+）=+++          =5-（+）

=4+5+（2+7）=10+             =70-－               =+5=5               =++（+）=2    =5-4=1

=10+10=20             =14                 =53

＋+++     48.3--      ×4.25+÷6     0.625×0.5++×62.5%      ×÷       +(-1.8)

=（1+9+99+999+9999）      = 48.3-（+）=9*4+4*     =*+**          =÷×    =+(-1)

=11107                    =48-20=28   =（9+）*4    =*（++1）          =1×=       =-1+

                                               =10*=                                                     =15+=18

2.5×(+++)     22×+25×75%-7×0.75     0.25×63.5－×        ×2.5-×    +3.125++     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×(-)]        49.5×-(50-)×0.6        ×+÷+       45×(+－0.6)       7×－37.5%+104×0.375    

=[110+（1+999）]/（56×-56×）=49*-49×      =×+*+       =45*（+-）    =7×－+104× 

=（110+1000）÷（24-21）         =49（10-）        =（++1）          =45*+45*-45*  =（7-1+104）×

=1110*                      =49*10=495           =*11=7                    =35+12-27=20       =（6+104）×=1000×=375

×(－5.375)      3.5×+1.25×+3.8÷         72×156-56×72       25×32×125       709×99+709     299×101

=*（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+）*

563×999    71×99           3755+2996        8439+1001       446+295      888+999         2100÷20

2×6.6+2.5×6      75.3×99+75.3     4.6×3.7+54×0.37       0.125×+×8.25+12.5%     8.37-3.25-(1.37+1.75)        

=2*6+2*6   =75.3*（99+1）    =4.6*3.7+5.4*3.7      =*+*8+           =8.37-1.37-（3.25+1.75）

=2（6+6）    =75.3*100         =（4.6+5.4）*3.7      =（++1）             =7-5=2

=2*12          =7530             =10*3.7               =*2=

=*=33                              =37

11―6―1      15―4.25―5      19.82―6.57―3.43     4.6+3+6+5.4     4+2.25+5+7        9.63÷2.5÷4       6÷0.25

=11-（6+1）=15-（4+5）=19.82-（6.57+3.43）=4.6+5.4+（3+6）=4+5+（2+7）=9.63/（2.5*4）    =6/

=11-8 =3     =15-10=5     =19.82-10=9.82      =10+10=20          =10+10=20           =9.63/10=0.963     =6*4=24

3－－       ×+×      ×+÷     18×（+）    ×7+×5      （－）×（24－）

=3-（+）    =（+）        =*+*        =18*+18*      =*（7+5）       =*24-*

=3-1=2          =                 =*+*          =2*4+3*5          =*12            =2-=1

                                  =+=             =8+15=23          =2*4=8

（×+）÷    ÷[（+）×]    ×7+×5     ×[÷(×)]       (＋)×15×11    12×103－4500÷75     

=（+1）**     =/（+）       =（7+5）        = *（*）         =*165+*165

=1                =*+*65         =2*4=8            =*=           =2*11+3*15

                   =+13=16                                                =22+45=67

(32×＋17)÷   （25＋）÷＋    ×＋×＋   （21×＋×21）×      （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－－           ×58＋×41＋

=/（*+*）        =*30+*30         =+3*2    =1-                =4-（+）      =*（58+41+1）

=/（+）             =25+24=49            =6        =                  =4-1=2        =*100=12

=/=*=

××－         ×＋÷        ÷[（－）÷]     235 - 135÷18        ×153 – 0.6×53          （＋）÷＋

=-             =+（*）       =/（*）                          =*（153-53）

=               =*2=1           =/=*5=4                          =*100=3*20=60

10 - - +       25×÷×         13.09－8.12－4.88     

=10-（+）+=25***         =13.09-（8.12+4.88）

=10-1+          ==6            =13.09-13=0.09

=9