练习（一）
4.8÷6= 0.96÷0.03= 2.4÷0.2=
4.8÷0.6= 9.622.8÷3= 5.983.81÷7= 322.17÷0.7= 0.45.4-3.6-1.4= 3012.9-8.5= 7.28+2-8+2= 286+198= 314-202=
526+301= 223-99= 0.450.8×1.25＝ 0.310×0.07＝ 0.3练习（二）
.
÷0.3= 25.8÷0.23= 19.76÷42= 246.4÷0.01= 5.3+6.7=
×0.01= 15×0.4= 2.8×3.6＝ 0.3×1.4＝ 0.05÷6=
÷5.2=
÷13=
÷1.5=
×1.4=
×2.5＝×0.3＝
×7＝
.
2.14－0.9= 0.5+7.6= 240÷48=
4200÷300= 0.75－0.38= 396+99=
90×30= 203－2.25= 1.57+3.43= 286+199=
18.54－9.9= 3648÷0.6= 964.8÷6= 0.964.8÷0.6= 9.63.24÷0.24= 3.2448÷0.6= 96 3.215×100= 0.8.
×35= 1×99= 2.4÷3= 0.24÷0.03= 2.4÷0.3= 3.24÷2.4= 2.4÷3= 0.24练习（三）
×10= 4.08－0.2=
÷2=
÷0.2=
÷0.2=
÷24=
÷2=
÷0.2=
×100=
.
1.1×0.2 = 0.6×0.8 = 3×0.9=
2.5×0.4= 3.6×0.4= 12.5×8=
50×0.04= 80×0.3 = 1.1×9=
0.16×5= 1.781.2×0.5= 0.712－3.9= 6.64.2÷3.5＝ 1.6+2.427＋456＋73= 0.30.9÷0.01＝ 1213÷4＝ 0.96练习（四）
0.92×0.4＝ 0.20.02×0.1＝ 1.28.2＋1.8＝ 100.
＋2.2 = 9.6÷0.01= 2.5÷0.66= 3.9×0.3= 2.14×0.3= 7.2÷0.3= 2.87÷0.3＝ 1.5×0.26＝ 0.14×0.3= 0.2－35.22＝ 2.3÷0.6 =
×0.4=
＋2.03＝
－0.9＝
＋2.8＝
÷0.7＝
×0.4＝
×4＝
×0.4＝
×4＝
.
2.5×0.4＝ 2.4×5＝ 0.22×4＝
3.25×0.5= 0.9－0.52＝ 3.99×1＝
0×3.52＝ 12.5×8＝ 8÷10 =
10-1.8-7.2= 0.43+3.57= 2.50.9×0.8= 7.5x-3x= a+3a+7a=
1.05×100= 11.47÷0.7= 5.40.56×100= 3.78练习（五）
2.5÷0.7= 10.13.25×9.04= 12.56.45×0.73= 4.63.08×0.43= 1.518.72÷3.6= 13.95.
÷0.5= 0.96÷6= 0.16.5×100= 4÷3.3= 10.75×8.8= 0.43×0.6= 8.9×26.7= 5.22÷3.1= 8×4×12=
÷3=
×10=
÷0.8=
÷12.5=
×0.28=
×0.05=
÷29=
÷10=
.
10-1.8-7.2= 0.43+3.57= 2.5×4×12=
0.9×0.8= 7.5x-3x= a+3a+7a=
1.05×100= 1÷0.5= 0.96÷3=
1.47÷0.7= 5.478÷0.6= 9.654÷0.12= 32练习（六）
0.35×0.3= 1.419.6÷4= 22.50.756÷0.36= 15.60.025×14= 3.063.84×2.6= 5.7690.75÷3.3= 3.681.55÷3.9= 3.7.
÷6= 128÷3.2= 65÷0.4= 36×5= 2.8×4= 0.396×13= 0.18×36= 0.04×3＝ 7.15×0.2= 16.9×0.016= 13.76÷0.4=
÷0.05=
÷0.18=
×4= 、
÷1.2=
×15=
×0.12＝
×22=
÷0.13=
×0.8=
.
5.2×0.6= 8.4×1.3= 6.4×0.5=
4.48×0.4= 5.25×5= 35.4×4.2=
0.042×0.54= 0.76×0.32= 0.25×0.046=
2.52×3.4= 1.08练习（七）
7÷0.25＝ 2.516÷1.6＝ 5.664.32÷16＝8.4÷4.2＝ 13.80.05×0.8＝ 2.561.23×3＝ 3.219.6÷2= 8.80.5×0.8= 8.47.2×0.3= 2.8.
×25= 4.8×0.7×0.8= 8×1.01= 0.36÷0.1＝ 72.8＋9.9＝ 2.4－0.37＝÷1.6＝ 3.5÷2.2= 0.75×0.2= 1.6×0.3＝ 0.9×0.25＝
－2.5＝
＋0.64=
÷0.8＝
×2.5＝
×2.5＝
＋3.5×3＝
×4＝
×0.2＝
÷0.15=
4.2 12.
1.8×0.4= 5.5÷0.55= 0.08×100=
2.2÷0.11= 5.46＋4.54= 12.5×0.8=
练习（八）
42÷0.003= 7881÷0.03= 7.210÷2.5= 1208.6÷0.002= 0.00362.5÷0.005= 0.366.3÷21= 8.68.4÷0.0084= 1.284.6÷0.023= 0.009133÷.0007= 5.050.00125÷50= 5.64.329÷6= 492.
÷0.06= 45÷0.002= 1000÷0.024= 7.5÷3.6= 8.6÷0.0006= 7.5÷0.0043= 46÷3.2= 9.8÷0.005= 39÷0.5= 123000÷700= 760÷0.004= 18.63÷0.005=
÷1.25=
÷5=
÷2=
÷2=
÷0.0023=
÷0.7=
÷0.0003=
÷1.23=
÷0.008=
÷0.03=
.
练习（九）
9.5×99= 13.5×0.98= 0.1-0.047=
0.29÷2.9= 3.4×0.2= 0.57÷19=
63+124+76= 7.099.5×101= 3.83.8×10.1= 0.12522.8÷3= 5.983.81÷7= 322.17÷0.7= 0.45.4-3.6-1.4= 3012.9-8.5= 7.28+2-8+2= 286+198= 314-202=
练习（十）
1025－768÷32= 645-45.
×10.8= 0.8×7.09=
×10.1= 7.69×101=
×72= 7×19+7=
÷0.23= 19.76÷5.2=
÷42= 246.4÷13=
÷0.01= 5.3+6.7=
×0.01= 15÷1.5=
×0.4= 2.8×1.4=
×12=
.
10-2.87-7.13= 0.96+9.6×9.9=
401×19+284= 640+128×45=
1.25×8÷1.25= 5.37×0+4.63=
2.5×7.1×4= 16.125.0-0.9＋0.9= 7.284.3×50×0.2= 643.94+34.3×0.2= 8.92.7×5.4×3.9= 3.68.05×3.4+7.6= 6.582.8×0.5+1.58= 32练习（十一）
70+50÷50+70= 13.7+0.98+0.02+4.3=
18.6－3.47－0.53= 72235×28－35×28= 2.6.
×99＋16.12=
×99+7.28=
－2.64×0.5=
×1.1×4.7=
×9.85-5.46=
×4.5×0.9=
＋4.9－0.9=
×101－72=
×78+78×7.4=
.
7.26-(5.26-1.5)= 8×(2.5＋0.25)＝
1.25×0.8×0.5＝ （1.5＋0.25)×4＝
0.12×0.5×0.16＝ 7.28×99+7.28=
4.3×50×0.2= 5436102×45-328= 10013.8×5.25+14.5= 300-42630.81÷0.25+5.96= 403(25+4)×4= 练习（十二）
526+301= 223-99= 0.450.8×1.25＝ 0.310×0.07＝ 0.30.92×0.4＝ 0.20.02×0.1＝ 1.2.
÷18 =
－9036÷18=
÷21=
÷13×27=
（1.2+ 1.8)×4.5=
×2.5＝×3.6＝ 0.3×0.3＝
×1.4＝ 0.05×7＝
×0.26＝ 0.14×4＝
×0.3= 0.2×0.4＝
.
8.2＋1.8＝ 100－35.22＝ 2.3×4＝
2.5×0.4＝ 2.4×5＝ 0.22×4＝
3.25×0.5= 0.9－0.52＝ 3.99×1＝
0×3.52＝ 12.52.5×1.25×0.32= 121.7+0.43+3.3= 75练习（十三）
4.8－4.8×0.5= (1.254.8×100.1= 56.54.85+0.35÷1.4= 0.8740.5÷0.81×0.18= 4.82.13×0×8257= 6.81+6.810.25×185×40= 2.50.25×39+0.25= (8.
×8＝ 5.4－2.5－1.4=
－6.2－3.8= (180+20)÷5=
×25×4= 250－250÷5=
－0.125)×8=
×99＋56.5=
×3.16+4.64=
×(15 ÷ 2.4)=
×99=
×(3.8×0.04)=
×5.27)×1.25=
.
6.81+6.81×99= 0.25×185×40=
6.8×0.75÷0.5= 3.75÷0.125–2.75=
1.53+23.4÷7.2= 1.2+3.2+0.8 =
1.2×2.5×4 = 3.01+1.7+0.99 =
练习（十四）
1×0.66÷6 = 2.7-2.7÷2.7=
5.4÷(0.51÷0.17)= 0.78×99+0.78=
5.4×(7.26÷6.05)= 8.7×17.4-8.7×7.4=
12.5×0.4×2.5×8= 0.68÷（5.2-3.5)×1.25=
(0.25+2.5+25)×0.4= 5-0.9×0.2+1.8÷0.5=
6.4×3.28+4.6×3.28-3.28= 12.27＋21÷(7.3－6.6)×2.4=
4.4×0.8－3.4×0.8= (9.37+9.37+9.37+9.37)×2.5=
2.37×6.3+2.37×3.7= 46×0.33+54×0.33=
1.93+2.7+2.07+7.3= 26×15.7＋15.7×24=
.
.
(2.275 ＋0.625)×0.28= 85.07－(15.3－4.8)+5.369=
40－（3.5－2.75+0.86）= 37×25+268÷67=
练习（十五）
（32+360÷45）×72=
412÷（607－36×14） 10.5（13.8－8.7）÷0.034= 6.25+3.85-2.125+3.875=
3.375+5.75+2.25+6.625= 2.13.375×0.97+0.97×6.625= 6.54+2.4+3.46+0.6=
95.6×1.8+95.6×8.2= 1.53.27×4 +3.27×5.7= 0.252.4+2.4×(5.375-3.375)= 7.5-5.7练习（十六）
12.37-3.25-6.75= 16.
（7590÷33－14）÷54=
÷(5.2-3.5)=
×4.3+5.7×2.1=
×4.2－0.75÷0.25=
×80－0.45÷0.9=
×1÷3=
×6.8+2.2×16+16=
.
58.7-16.65÷3.7= 0.4×4.7×2.5+(2.3+5.3)=
9.31-1.125-7.875= 400×(0.62+0.08)=
1.2×(9.6÷2.4)÷4.8= （8.58－3.69）×（3.4－1.8）=
1.5×（10.03－15.6÷7.5）= 30.6÷（4.5×0.16）=
4.7+3.91÷(32-29.7)= 3.12×（0.9＋0.7÷0.1）=
9.2+9.728÷3.2×1.5= 2.4×0.75＋1.25÷2.5=
（20.2×0.6－2.12）÷0.1= (1.5×0.9+3.65)÷2.5=
练习（十七）
8.48÷0.8×0.9= 101×0.36÷（14.4×0.05）=
(25.3-9.7)÷0.3×8.5= 10.5÷(5.1－4.4)+18.25=
4.11－0.72×(3.38－2.13）= 1025－1125÷4.5×3.6=
（6.8－5.4）×2.75－0.9= 0.875×36+4.05÷8.1=
（227÷25－4.68）×0.5= 630÷（2.98＋6.5×0.08）=
(21.88+29.8) ÷7.6= (8.1－5.4)÷3.6＋85.7=
.
.
(3.44+20.5×0.32)÷0.16= 0.54÷(8.7＋45.3)×28.4=
0.1÷1+1÷0.8－0.1=
练习（十八）
（1.25＋6.4）－14.88÷2.4= (4.358.8÷（0.6×0.7）÷0.02= 10.43.6÷（1.2＋0.5）×5= 13.73.6×1.25+ 0.32÷0.4= 0.82.5×(6＋9.728÷3.2)= 5.25.4÷(3.94＋0.86)×0.8= 19.2810.56×3.75－3.75×0.56= (1.5 练习（十九）
（37.62+20.76）÷0.042= (6.02 + 2.8 )÷0.4 - 2.05= 3.27(71.2－71.2×0.9)÷0.25= 1.08.
－2.01＋2.2)÷4=
－7.79÷（0.35＋0.6）=
×0.25－3.7÷4=
×(3.2－2.99÷2.3)=
×(4.6÷0.92×0.04)=
＋1.82÷0.7=
÷0.8－1)÷0.4=
（17.2-4.5×3.6）÷0.32=
×（80.5-9.84÷0.16）=
÷（3.94+34.3×0.2）=
.
（4.25-4.25×0.8）÷1.7= 1.46×5+12.8÷0.4×7.5=
1.52－1.6×5＋5.7= 3.8＋（24－25×0.6）=
(0.25 +0.125）÷（0.75×0.4)= 20－2.5×4÷8=
(4.8－4.8×0.5)÷2= 0.8×（10.4＋0.64）÷0.92=
练习（二十）
(25.3-9.7)÷0.3×7.6= （4.5+1.3×6）÷1.5=
58.8÷（0.6×0.7）÷0.02= 0.4×(3.2-0.8)÷1.2=
16.78-1.6×1.5÷0.8= (53.73-17.49)×(2.6+12.4)=
18.64－4.35×2＋20.9= 80－8.2×（10－7.6）=
(9－8.5)×(5－4.76)÷0.1= 1.6＋8.4×1.5÷0.18=
（1.1-0.78）×（2.7-1.95）= （20.2×0.6－2.8]÷0.4=
0.06×(10.14－0.64)÷2= 17.68÷5.2+2.7×1.5=
练习（二十一）
19.8+(3.749-0.299)÷2.3= 8.6+15.4÷0.4×1.4=
.
.
1.5×1.2－0.6÷2.4= 0.6×（6.25÷2.5＋0.25）=
4.32×15÷12＋5.1÷0.85= 5.6×(12.5－8.5 ÷0.85)=
8.74 - 8.74÷23+700×0.03= 0.38+9.62÷3.7×5.4=
4.38÷（36.94+34.3×0.2）= 1.6×(2.25+27.75÷1.5)= 2.026.5×(10-3.7)+2.98= 4.75+8.4.
（5.84-3.9）÷0.4+0.15=
×1.027÷0.26）=
÷(9.2-6.8)=
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