口算.7.6+215=0.875-58=6.8×0.1=3.6÷1.2=1.5÷513=34×2.4=127÷67=0.35+91320=9×300%=1.69÷1.3=12.5×88=10.7×10=2.3×102=5-149=0.5+18=23÷23=156×10=518÷123=125÷14%=a÷18=8π=122=
      口算. 7.6+2= |   0.875-= |   6.8×0.1= |   3.6÷1.2= | 
    |  1.5÷= |   ×2.4= |   ÷= |   0.35+9= | 
    |  9×300%= |   1.69÷1.3= |   12.5×88= |   10.7×10= | 
    |  2.3×102= |   5-1= |   0.5+= |   ÷= | 
    | 1×10= |   ÷1= |   1÷14%= |   a÷= | 
    | 8π= |   122= |   ( )3= |   2×π×6= | 
    | 3.14×(102-82)= |   40×99= |   1×101= |   1÷25%= | 
    |  16×62.5%= |    3.6÷1= |   5÷5×= |    2+2÷5= | 
    | 1×÷= |   +×2= |   125×27×8= |   015:4.5= | 
    | 6:1= |   1:2.5= |   (-)×30= |    6××6÷= | 
 
 
 
答案和解析
       7.6+2=9.8 |    0.875-=0.25 |    6.8×0.1=0.68 |    3.6÷1.2=3 | 
    |  1.5÷=3.9 |   ×2.4=1.8 |   ÷=2 |   0.35+9=10 | 
    |  9×300%=27 |   1.69÷1.3=1.3 |   12.5×88=1100 |   10.7×10=107 | 
    |  2.3×102=234.6 |   5-1=3 |   0.5+=0.625 |   ÷=1 | 
    | 1×10= |   ÷1= |   1÷14%=10 |   a÷=8a | 
    | 8π=25.12 |   122=144 |   ( )3= |   2×π×6=37.68 | 
    | 3.14×(102-82)=113.04 |   40×99=3960 |   1×101=126.25 |   1÷25%=4 | 
    |  16×62.5%=10 |    3.6÷1=2.8 |   5÷5×= |    2+2÷5=2.4 | 
    | 1×÷=1 |   +×2= |   125×27×8=27000 |   0.15:4.5= | 
    | 6:1=3.5 |   1:2.5=0.45 |   (-)×30=10 |    6××6÷=36 | 
                     
 
 
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