人教版四年级数学下册小数加减法混合运算专项练习题105.docx
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人教版四年级数学下册小数加减法混合运算专项练习题105.docx
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人教版四年级数学下册小数加减法混合运算专项练习题105
一、口算。
8.4-0.6=6.6+2=0.79+0.23=6.3+0.5=
4.6+0.5=8+1.5=0.69-0.18=6.1+0.1=
6.5-0.4=9+1.1=0.62+0.23=4.3+0.1=
3.2+0.5=8.2+3.6=0.62-0.05=5.5-0.2=
7.7+0.6=8.6+4.1=0.84+0.2=2-0.4=
2.1+0.5=6.7+4.9=0.66+0.02=4.9-0.7=
5.4+0.5=7.5+4.6=0.86+0.07=2.2+0.1=
2.9-0.3=9-1=0.78-0.42=1.7+0.8=
二、混合运算。
0.86-0.35+38.8-0.64-0.3650.3+12.2+26.3
71.11+16.98+75.4179.58+31.75+978.5-3.07-4.2
40-(7.13-0.26)76.1+(16.2+2.8)8.45+6.19+1.64
一、口算。
5.6+0.4=8-1.3=0.8+0.14=8.3-0.1=
3.3-0.6=7.2+2.6=0.6+0.28=1.4-0.6=
4.4-0.2=6-2.4=0.77-0.27=4.9+0.7=
4.2-0.9=8.8+1.2=0.77-0.39=7.4-0.2=
7-0.6=6.5-3.6=0.9-0.07=4-0.8=
1.9-0.6=7.9-3.1=0.8+0.49=5.9-0.2=
1.1+0.3=7.6-2=0.76-0.28=4-0.9=
6.8-0.7=6.1+3.2=0.66-0.33=7.1+0.9=
二、混合运算。
0.72+0.06+4.35.1-0.36-4.6435.5-17.1+16.8
70.78-10.21+20.9767.52-47.27+92.369.63+6.31+2.45
90-(4.97-0.94)77.7-(12.8-2.7)5.55-3.84-1.1
一、口算。
6.1+0.8=7.6-0.3=0.68+0.06=2.2-0.4=
6.7-0.4=7.9-3.9=0.73+0.16=6.2+0.7=
1.8-0.4=9+0.6=0.86-0.2=8.3+0.6=
4.2-0.9=7.7-1.9=0.73+0.14=4.9-0.5=
5-0.6=7.4+1.5=0.88+0.24=1.4+0.6=
5.8-0.4=7.3-4.9=0.68-0.14=6.5+0.6=
6.8-0.7=8.5+4.1=0.87+0.02=5.7-0.8=
6.3-0.1=6.3-3.8=0.79-0.04=3.8+0.9=
二、混合运算。
0.89-0.21+5.57.8-0.78-3.2239.1+18.8-18
60.44-21.42+17.8962.92-24+26.274.55-2.12+1.22
40-(1.07+0.2)77.6-(23.8-5.7)7.68+1.39-4.54
一、口算。
5.5+0.6=8.6-3.9=0.85-0.28=4.6-0.2=
4.3-0.2=8.5+2.7=0.61+0.25=8.9-0.6=
6.2-0.5=6.7+1.1=0.69-0.16=7.7+0.3=
7.6+0.5=6.6-1.5=0.87+0.06=2.3-0.8=
6.6+0.3=7.3+4.6=0.66+0.2=9-0.6=
6.2+0.9=6.5+3.9=0.78-0.24=7.3-0.2=
2.9-0.9=6.8+3.4=0.84-0.11=7.1+0.6=
3.8+0.7=6.6-4=0.67-0.35=6.1+0.1=
二、混合运算。
0.86+0.27+3.96.5-0.84-3.1685.3-31.8+38.7
68.15-30.38+75.0280.93-21.44+17.96.74-3.93+1.45
50-(2.31-0.92)85.4-(15.8+5)4.67-1.73+1.84
一、口算。
6.6+0.6=6.6+0.3=0.81-0.38=4-0.1=
7.7+0.1=7.1+4.2=0.87+0.04=7.6-0.2=
1.5+0.3=8.5+4.7=0.76-0.23=6.3+0.8=
2.7-0.9=8.9-1.4=0.65+0.39=5.5+0.3=
7.7-0.2=6.9-3.3=0.81-0.03=4.9+0.3=
3.1+0.2=8.9+2.1=0.6-0.16=2.1+0.2=
5-0.8=6.7+1.3=0.6+0.16=6.8+0.3=
3.3+0.6=6.4-3=0.9-0.17=4.7+0.3=
二、混合运算。
0.82+0.33+4.28-0.68-1.3285.8+30.6-28.7
77.88+35.07+70.1275.12-22.32+17.568.18-6.31+1.02
20-(5.59-0.64)77.8-(29.8-9.6)8.06+5.39+1.83
一、口算。
1.9-0.4=7-4.5=0.62-0.45=7-0.8=
7.1+0.2=7.8+3.3=0.87-0.36=6.9-0.3=
3+0.4=6.8+3.1=0.76+0.01=1.1-0.8=
7.9-0.2=6-4.4=0.83+0.32=8.1+0.5=
8+0.7=8.1+1.3=0.8-0.05=5.6+0.3=
5.8+0.1=6.5-2.5=0.66-0.45=2.3+0.1=
1.7+0.8=7.7+3.3=0.71-0.03=7.4+0.2=
6.9+0.5=7-2.5=0.61-0.35=7.9+0.5=
二、混合运算。
0.9-0.24+6.38.3-0.2-0.876.2+15.6+15.9
78.92-38.14+29.7969.49-46.26+91.328.98-5.49+3.36
50-(7.21+0.22)89.5+(12.2-7)9.77+7.38-2.13
一、口算。
8.8-0.3=7.8+2=0.84+0.42=7.2+0.5=
5.2+0.1=9+0.2=0.83-0.48=9-0.1=
3.8+0.9=8.5+4.6=0.68+0.31=4+0.9=
8-0.7=8.2+4.6=0.9-0.14=2.2-0.7=
6.9+0.6=7.6-2.6=0.68+0.37=1.5+0.9=
5.3-0.5=7.2-2.9=0.73+0.43=5.1+0.8=
7-0.3=6.2-0.5=0.86+0.12=8.1-0.9=
2.8-0.6=6.1+2.1=0.9-0.33=8.5-0.3=
二、混合运算。
0.63+0.38+8.26.1-0.47-0.5373.2+40.5-15.1
69.22+10.06+42.5572.38-23.79+63.679.45-3.63-2.57
90-(4.63+0.22)75.4+(24.7-5.9)4.63-2.92+1.47
一、口算。
1.5+0.3=6.7-0.7=0.88-0.46=1.8-0.2=
3.3-0.5=6.5-0.8=0.64+0.28=6.2-0.3=
4.7+0.4=6.1-0.6=0.68-0.08=3.9+0.2=
6.5-0.6=8.7-3.3=0.65+0.18=2.4+0.7=
1-0.6=6.3+4.8=0.76+0.1=1.5-0.3=
5.4-0.3=8.9-0.8=0.74+0.38=8.3-0.7=
3.5-0.4=6.9+1.1=0.77+0.39=5.7+0.3=
1.9-0.9=6.9-1.8=0.68-0.06=1.6-0.5=
二、混合运算。
0.75-0.19+4.85.5-0.7-3.341.9-23.8+10.4
74.75+27.27+12.5576.23+45.02+61.125.67-3.83+1.48
80-(7.19+0.49)99.5+(18.7+5.1)8.86+5.4-3.03
一、口算。
2.6-0.2=6.4-4.3=0.88-0.25=8.8-0.1=
1+0.6=7.5-0.1=0.63+0.49=6.7-0.4=
1.4-0.9=8.1-0.3=0.63+0.36=3-0.3=
2.3-0.1=8.8-3.5=0.73-0.49=2.5+0.8=
6+0.3=7.4+2.2=0.6-0.04=1.2-0.1=
7.7+0.3=8+1.9=0.73-0.43=7.1-0.8=
8.2+0.2=7+4.8=0.81+0.31=1.7+0.5=
7.8+0.9=8.6-3=0.66-0.13=1.6+0.1=
二、混合运算。
0.8-0.41+3.89.3-0.68-2.3265.1-39.6-18.6
70.85+34.73+70.0480.5+37.42+96.264.8+1.3+1.31
50-(5.41+0.89)77.1-(11.2-3.5)5.58-3.47+1.78
一、口算。
3.8+0.3=6.1-3.7=0.75-0.05=8.1-0.6=
5.7+0.2=8.4+2.6=0.76-0.01=5.2+0.5=
7.3+0.6=7.4-4.2=0.66+0.27=2.7+0.2=
4.2+0.4=7.8+4.6=0.87+0.37=7.1-0.6=
5+0.8=8.8+4.1=0.68+0.17=3.3+0.3=
4.2+0.6=8.5+4.7=0.8+0.43=1.1-0.6=
8+0.9=8.8-1.1=0.89+0.23=1.9-0.9=
9+0.2=8.4-1.8=0.89-0.23=8.6+0.1=
二、混合运算。
0.63-0.01+9.55.9-0.61-1.3993.9+53.5-20.2
60.25+43+74.1778.42-36.71+26.59.03-2.55-5.27
30-(3.58+0.14)65.2+(17.7+9)7.89-2.46-1.46
一、口算。
7.1-0.2=6+2.8=0.76+0.35=8.5+0.8=
2.5-0.3=7.2-0.3=0.72+0.25=2.5-0.8=
2.6-0.4=7.1-2.7=0.76+0.45=4.8+0.5=
1.6+0.2=7+2.2=0.74+0.17=5.6+0.3=
7.1-0.2=7.9+0.4=0.63+0.17=8.2-0.9=
7.7-0.2=7.6+2.1=0.85-0.38=2.8-0.4=
4.7-0.7=8.9+1.9=0.68-0.11=1+0.4=
1.3-0.5=6.9+1.5=0.71-0.1=8.9-0.1=
二、混合运算。
0.89-0.32+0.48.3-0.61-0.3966.9-45.5+19.9
70.24+42.2+69.0788.11-28.77+10.286.18+3.99-1.1
40-(7.93-0.72)91.7+(25.8-7)7.76-2.95+1.71
一、口算。
4.3+0.4=7.3+0.4=0.85-0.17=6.2-0.7=
2.7+0.3=7.8+2.3=0.63+0.35=8.1-0.6=
1.1-0.7=7.1+3.3=0.66+0.49=4.1+0.5=
4.7-0.2=8.1-3.9=0.7-0.31=6.3+0.8=
2.1-0.1=6.4-0.1=0.65-0.42=4+0.5=
7.4+0.3=7.6+2.6=0.63-0.04=4.1+0.5=
1.7+0.6=8+0.9=0.86-0.16=5.7-0.9=
2-0.4=8.7-2.7=0.9+0.27=2.3+0.9=
二、混合运算。
0.73-0.36+3.87.2-0.21-0.7995.2-20.5-20.1
71.62-34.12+78.1176.69+41.18+95.256.36-2.75+1.42
20-(1.51-0.56)88.3+(12.5-6.5)7.87+3.16+1.14
一、口算。
4.5+0.8=6.3+3.2=0.89+0.27=1.3-0.9=
5.2-0.2=8.7-0.1=0.76+0.33=8.1+0.2=
2.6+0.3=6+4.8=0.72-0.09=5.7+0.3=
6.8+0.3=7-1=0.69-0.02=7.6-0.6=
1.9+0.1=6.9-2.9=0.77+0.11=8.6-0.4=
4.1-0.2=8.9-3.4=0.78-0.41=4.8-0.7=
8.2+0.9=8.4-0.3=0.78-0.05=1.8+0.3=
2.3+0.2=8.7-2.1=0.67+0.17=6.4+0.8=
二、混合运算。
0.65-0.11+9.26-0.89-4.1192.7+22.4+56.1
76.14+16.72+80.9181.74-11.52+80.227.7+5.04+2.39
80-(2.5-0.47)74.2+(29.8-6.6)4.1+2.57-1.52
一、口算。
8.9+0.3=7+1.9=0.7+0.09=2.7-0.6=
8.8-0.5=8.6-2.5=0.88+0.06=4.3+0.5=
8.2+0.2=6.3-0.8=0.66+0.38=5.4+0.8=
8+0.2=6.6-0.9=0.89+0.2=7.1+0.7=
2.6-0.3=7-0.4=0.86-0.4=5.8+0.4=
4.3-0.3=7+4.9=0.63+0.47=8.1+0.9=
6.9+0.8=8.5-3=0.88+0.12=7.5-0.7=
2+0.3=6.9-1.1=0.69-0.42=6.4-0.8=
二、混合运算。
0.85-0.09+0.38.2-0.51-4.4938.8+14.9-17.2
72+32.88+77.5381.1+43.47+76.057.47+3.06+3.74
50-(5.73-0.48)67.4+(19.6-9.4)4.55+2.36-2.02
一、口算。
1.3+0.8=7.8-2.7=0.76-0.01=8.9+0.4=
3.2+0.6=6.5-2.8=0.63-0.33=8.5-0.9=
1.7+0.8=8.6-1.7=0.76+0.26=3.9-0.8=
7.2+0.5=7.8+2.8=0.73+0.37=5.1-0.5=
3.7-0.1=7.8+4.5=0.69-0.18=4+0.5=
2.2+0.7=6.4+3.1=0.65-0.47=8+0.7=
6.9+0.9=7.1-2=0.9-0.22=2.7-0.2=
9-0.8=8.6+3.7=0.78+0.3=2.9+0.3=
二、混合运算。
0.86-0.16+7.15.5-0.62-0.3892.7+30.4+14.3
77.08+26.99+13.8171.06+38.17+63.829.89+5.69-2.7
50-(5.16+0.2)93.5-(23.7+9.5)4.07+2.51-1.27
一、口算。
2.4-0.9=7.5+4.5=0.87-0.14=7.3+0.3=
3.3-0.4=6.4-1.8=0.67-0.2=6.5-0.4=
2.5+0.9=6.7-4.2=0.85+0.14=7.2-0.9=
2.1+0.4=8.8+2.2=0.74+0.1=1.1-0.3=
8.9-0.4=8.6+0.3=0.64-0.22=3.8-0.6=
4.5+0.5=7.1+1.8=0.66+0.46=4.1+0.3=
4.5+0.3=6.9+3.4=0.69+0.34=1.5-0.3=
1.4-0.7=9+4.9=0.79-0.11=4.5-0.4=
二、混合运算。
0.76+0.39+6.48.4-0.41-4.5967.3-47.2+18.5
62.88+19.01+16.865.39+35.58+28.888.9-5.83+2.55
50-(2.98-0.95)82.4+(10.9-8.8)5.34+1.44+1.26
一、口算。
2.2-0.5=8.1+4.9=0.8-0.37=4.1+0.9=
8.1-0.5=7.3+4.1=0.73-0.15=2.8-0.6=
8-0.4=6.8+2.1=0.84-0.35=8.7+0.6=
4.5-0.4=6.9-3.6=0.85-0.22=5.6+0.7=
7.5+0.4=7-4.1=0.68-0.39=7.4-0.2=
1.8-0.2=7.7-0.1=0.64+0.36=1.2+0.4=
4.3-0.5=8.5-1.7=0.78+0.16=2.6-0.7=
4.6+0.4=7.3+2.1=0.7+0.37=2-0.8=
二、混合运算。
0.76-0.28+0.79.3-0.72-4.2840+18.2-11.3
84.27-24.73+88.4781.13-32.85+58.888.1+6.31-1.57
30-(2.64+0.99)79.9+(13.3-6.1)8.44-5.1-1.88
一、口算。
1.5-0.3=7.2-4.4=0.81-0.19=8.9-0.4=
1.7+0.3=7.6-0.8=0.86-0.19=7.5+0.2=
4.4+0.8=8.3+3=0.68+0.39=
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