人教版四年级数学下册小数加减法混合运算专项练习题108.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108.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108
一、口算。
2.7-0.3=6.5-4.6=0.63-0.17=4.2+0.7=
6.3+0.9=7.2-1.5=0.78+0.43=2.3+0.9=
5.6-0.9=6.9-4.7=0.75+0.11=8.9-0.7=
8.4-0.4=8.7+4=0.82+0.1=6.6-0.4=
8.2+0.5=7.6+3.3=0.79-0.12=1.4+0.6=
6.4+0.4=7.4-1.9=0.89-0.07=2.5-0.5=
3.7+0.9=9+2.7=0.68-0.48=4-0.6=
3.3+0.5=6.5-3.9=0.61+0.37=3-0.4=
二、混合运算。
0.62-0.28+47-0.23-2.7753.9+33.6-13.5
75.17+11.25+36.780.98-28.7+92.044.26-1.62+1.99
60-(9.82+0.73)62.8+(15.4+4.5)6.19+4.58-1.16
一、口算。
1.5+0.8=6.7+2.8=0.68-0.22=1.7-0.9=
3.4-0.4=6.5+1.5=0.7-0.48=3.7+0.6=
5.5+0.6=6.8+4.4=0.82+0.29=4.4+0.5=
1.1-0.9=7.5-2.3=0.69+0.38=8.3+0.4=
1-0.5=6.5+2.5=0.77-0.33=5.4-0.3=
5.7+0.7=8.9-3.4=0.82-0.27=2.4-0.8=
2.8-0.1=6.5+1.8=0.71+0.03=5.4-0.6=
8.1-0.2=6.3-4.2=0.62-0.15=3.7-0.6=
二、混合运算。
0.68-0.27+0.26.4-0.13-0.8771.1-16.5+12.8
80.67+24.33+42.179.34+42.77+23.897.92+1.77-3.12
70-(1.85-0.31)75.6-(13.8+8.9)4.11+2.11+1.08
一、口算。
6.3+0.2=7.8-3=0.77-0.29=5.7+0.3=
5.4+0.6=7.1-2.4=0.73-0.24=8.9-0.6=
6.2+0.4=6.9+0.1=0.63+0.36=1.7-0.4=
2.7+0.9=6.8-3.1=0.85+0.31=7.5+0.5=
1.3+0.8=6.1-1.8=0.75+0.45=4-0.5=
7.9-0.6=7.2+0.6=0.66-0.46=6.8+0.4=
1.4+0.7=6.8-1.6=0.77-0.28=9-0.2=
5-0.3=7.1+0.7=0.65-0.02=6.2-0.6=
二、混合运算。
0.78+0.45+99.5-0.22-1.7879.3-34.4-36
80.48+40.81+99.1188.09+14.29+44.833.72-1.31+1.42
50-(6.96+0.25)87.7-(29.7-3)9.9-1.44+3.23
一、口算。
4.6-0.6=7+3.1=0.82+0.01=2+0.1=
6.2-0.5=7.3-2.4=0.83-0.29=4.2+0.3=
4.3-0.2=8.1-0.1=0.65-0.31=1.1-0.9=
3.5-0.8=7+4.1=0.78+0.44=8.2-0.2=
7.8+0.6=7.4+3.5=0.85+0.37=1-0.3=
9+0.5=7.6+0.6=0.74-0.24=1.7+0.8=
1.9-0.1=6.2+0.9=0.61+0.4=4+0.4=
2.5-0.2=6.1-2.1=0.61-0.49=3.1-0.4=
二、混合运算。
0.71-0.26+2.15-0.73-3.2776+31.8-19.2
89.77+21.44+76.9561.11-42.35+21.077.66+3.34+3.71
60-(1.41+0.83)83-(15.1+9.7)6.85+1.65+2.13
一、口算。
1.6+0.3=8.5-3.3=0.75+0.19=1.4-0.7=
2.1+0.4=6.6-0.6=0.72-0.31=4+0.9=
7.2+0.5=6.3+1=0.78-0.32=5.9-0.8=
4.9-0.5=8.1+2.4=0.79+0.07=6+0.2=
8.6+0.1=7.7+1.1=0.85+0.16=5-0.9=
6.1-0.4=8.9+3.5=0.6-0.38=8.4-0.6=
5.2+0.2=7.8+1.1=0.78+0.3=7.8+0.9=
3.2+0.2=8.8-4.5=0.9+0.27=6.8-0.6=
二、混合运算。
0.7+0.24+4.47.5-0.27-0.7370-51.3-17
85.15+26.26+62.1289.25+15.74+12.036.66+1.64-4.35
50-(5.63-0.67)72.4+(24.4-5.5)9.04+2.86-5.87
一、口算。
3.8+0.9=7.5+0.7=0.73+0.02=8.7-0.5=
6.3+0.8=6.9-3.7=0.7-0.48=4-0.2=
6.1+0.9=8.5+3.4=0.88-0.12=4.8-0.3=
7.5+0.7=8.8+3.7=0.78+0.05=5.1+0.3=
3.4-0.5=6.1-0.9=0.65+0.09=2.1-0.5=
7.2-0.2=7.9-2.2=0.62-0.05=5.6+0.4=
6.8-0.5=7+1.6=0.76-0.39=2.1+0.4=
4.1-0.3=7.6-3.4=0.89-0.25=3.7-0.5=
二、混合运算。
0.67+0.04+8.58.7-0.29-3.7187.9+52.6+11.2
70.49+46.48+78.3263.74-41.7+48.765.17+1.56+1.46
60-(1.6+0.86)64.8+(17.4-2.4)9.74+2.16+3.2
一、口算。
7.3+0.6=8+0.9=0.75+0.43=5.8+0.4=
1.8+0.9=8.4+4.8=0.68-0.23=3.2+0.6=
5.2+0.4=8.3-2.7=0.75-0.11=8.9-0.6=
3.6-0.8=8.6-2.1=0.83-0.44=2.9-0.4=
1.6+0.7=8.8-1.1=0.71+0.11=1.3-0.8=
5.9+0.5=7.1+4.2=0.68+0.28=1.1+0.9=
4.6-0.9=7.6-4.6=0.86-0.18=7.7+0.6=
3.1+0.8=7.7+3.5=0.66+0.03=2.5-0.2=
二、混合运算。
0.88+0.44+9.17.2-0.32-3.6840.6-21.3-17.3
66.79-22.6+14.6265.55+41+17.029.89-6.13-3.08
60-(3.55+0.13)67.3-(13.3-3.5)5.11-3.1-1.6
一、口算。
6.6-0.4=7.9+1.8=0.81-0.34=6.5+0.1=
2.5+0.6=8.4-2=0.6-0.06=8.4-0.1=
7-0.1=6.8-3.7=0.72+0.29=2.9+0.5=
1+0.2=8.6+2.6=0.71-0.48=2.6-0.5=
6-0.4=6.5+1.1=0.76-0.21=3.9+0.5=
6.1-0.9=8.3-2.3=0.79+0.3=4+0.3=
6.2-0.9=7.9+0.9=0.81+0.4=2.2-0.3=
4.7+0.2=9-4=0.64+0.18=8.9-0.5=
二、混合运算。
0.84-0.2+6.65.7-0.38-4.6241.4-11.5+11.4
67.82+32.62+69.784.19-39.25+95.544.93+1.21+2.76
30-(7.21-0.31)66.4-(17.6-5.1)7.17+5.36+1.42
一、口算。
7.5+0.2=6+2.5=0.6+0.28=7.6+0.6=
7.7+0.7=7.5+4.7=0.86-0.05=4-0.4=
1.6-0.6=8.1-4.1=0.8-0.41=1.5-0.1=
7.7-0.3=7+4.4=0.8-0.12=8.1-0.9=
1.2+0.6=8.4+1.2=0.68+0.27=6.9-0.9=
5.6-0.4=7.5+0.7=0.73+0.16=3.1-0.3=
5.9-0.4=7.9+0.6=0.8-0.02=6.1+0.4=
7.5+0.6=7.8+0.5=0.87-0.31=1.5-0.7=
二、混合运算。
0.81-0.4+4.29.8-0.3-2.788.5-36.3-11.7
80.7+30.37+56.6289.19+43.28+24.227.62+5.81-1.11
40-(2.48-0.32)61+(27-6.8)3.59+2.08-1.37
一、口算。
5.8+0.6=6.7-4.4=0.83-0.33=4.2+0.5=
8.4-0.2=7.4+1.8=0.8-0.35=1.7-0.7=
6.3+0.8=8.8+2.2=0.75+0.22=3.4+0.7=
2.2-0.9=7.1-3.1=0.67-0.36=1.2+0.8=
8.8-0.8=6.1+2.7=0.83+0.28=4.7+0.2=
1.5-0.3=7.3+4.5=0.77+0.17=6.7-0.5=
2.2+0.6=8.1+4.8=0.72-0.27=5.4-0.6=
8-0.4=7.1+4.7=0.63-0.17=5.6-0.4=
二、混合运算。
0.84+0.1+0.35.2-0.66-4.3461.2-40.8-13.1
87.34+21.35+74.1565.59+25.87+14.226.96+2.09-1.74
90-(4.75-0.41)86.4+(15.9+5.3)6.71-3.48-1.77
一、口算。
1.4-0.6=8+4.1=0.74-0.34=7.7-0.5=
6.6+0.8=8.1-1=0.76-0.47=6.1+0.5=
1.1+0.1=8.5-0.1=0.64+0.42=3-0.2=
8.9-0.4=8+4=0.83+0.36=7.7+0.4=
1.6+0.6=8.5+2.2=0.65-0.26=1.7-0.6=
7.8+0.2=6.4-4.3=0.87+0.41=9-0.4=
4.9+0.2=7.4+1.5=0.85+0.1=9+0.5=
4-0.7=8.9+1=0.9+0.04=5.8+0.1=
二、混合运算。
0.77-0.08+8.67.4-0.46-2.5439.9-21.4-12.8
80.77+46.77+17.0663.53-35.83+738.98-4.89-2.04
50-(8.51+0.94)94.4-(23.1+1.6)5.23+1.47-1.02
一、口算。
8.9-0.5=6.4+0.4=0.63-0.01=2.9+0.4=
8.1-0.8=7.7+0.6=0.71+0.1=2.2+0.6=
3.8-0.9=6-4.8=0.9+0.04=6.1-0.6=
8.6+0.1=8.9+1.7=0.61+0.22=4.6-0.7=
6+0.2=7.3+2=0.62+0.41=7.6+0.1=
3+0.5=6.1-3.9=0.62-0.48=1.2+0.9=
3.1-0.2=8.9-2.4=0.63-0.38=8.8+0.3=
8.7+0.8=6.7+1=0.74-0.29=7.8+0.1=
二、混合运算。
0.65-0.49+6.18.7-0.58-2.4266+27.4-17.8
82.37+38.72+36.4581.84+37.45+31.336.89+2.9-3.64
30-(5.29+0.85)83.6-(21.4-7.7)4.88+1.28-2.04
一、口算。
2.1-0.1=6.7+0.4=0.8+0.16=6.9+0.7=
8.7+0.1=9-4.9=0.9+0.42=7.7-0.2=
5.5+0.6=7.3-2.1=0.83+0.34=3.5+0.6=
4.2+0.8=7.1+3.5=0.73-0.41=4.2-0.1=
8.8-0.7=8.5+3.1=0.68+0.25=5.6-0.5=
1.7+0.1=8.7+3.1=0.6+0.13=8.2+0.7=
7.1+0.1=8.6+4.2=0.83-0.04=7.3-0.7=
8.6-0.5=8.5-3.1=0.63+0.25=8.3+0.6=
二、混合运算。
0.82-0.06+3.45-0.32-2.6885.6-13.5+32.5
67.62+23.86+46.1963.1-23.09+85.524.17-2.63-1.26
90-(2.45-0.62)81+(27.3+4.9)6.31-4.37+1.47
一、口算。
5+0.8=8.4+3.6=0.63+0.45=8-0.4=
3.3-0.8=6.5-3.6=0.8+0.16=9-0.3=
1.4-0.3=7.1-2.7=0.71+0.45=5.4+0.1=
2.6-0.6=7.7+4.7=0.62-0.48=4.2+0.5=
3.6+0.8=6.1+4.2=0.72+0.16=8.5+0.4=
3.8+0.9=8.8+1.5=0.68-0.49=8-0.9=
2.8+0.7=7.9+1.5=0.68-0.05=8.6-0.1=
7.5-0.8=8.4-4.6=0.65+0.13=2-0.3=
二、混合运算。
0.62+0.04+0.77.9-0.36-0.6456.5-11.7+13.6
85.28-22.41+67.8882.91+22.73+93.023.64-1.88+1.51
20-(9.19+0.61)64-(15.4-9.5)6.13-1.51-3.3
一、口算。
9-0.2=8.6+4=0.82-0.37=3.9+0.6=
1.6+0.5=7.5-4.7=0.79-0.08=4-0.8=
3.7-0.4=7.5-1.7=0.82+0.03=2.2-0.1=
1-0.4=8-4.5=0.66-0.01=1.4-0.3=
1.7-0.9=8.6+0.1=0.88-0.47=5.6+0.6=
6.6-0.4=6.4-0.9=0.73-0.46=8.5+0.2=
3.5+0.6=6.2-2.9=0.88-0.11=6.7+0.4=
8.7+0.3=7.7-1.2=0.84+0.02=5.5-0.3=
二、混合运算。
0.8+0.43+3.35.1-0.16-3.8466.8-27.4-18
68.67+37.71+66.6277.73-18.87+52.365.37-2.04-2.08
60-(5.08-0.4)73.9-(13.3+1.9)6.68-1.61-2.61
一、口算。
8-0.2=7.2+2.5=0.86-0.41=7.3-0.3=
6.2-0.7=9+0.2=0.88-0.24=8.2+0.3=
3.9-0.3=7.8+2.2=0.6+0.26=1.9+0.8=
8.4-0.6=7.1+1.8=0.85+0.11=1.4+0.4=
2.1+0.3=6+2.4=0.75-0.3=1.5-0.3=
8.5+0.8=8+4.7=0.89+0.18=7.6+0.6=
8.9-0.9=8.6-0.5=0.8-0.27=4.1-0.2=
1.3-0.9=8.9-0.6=0.64-0.45=5.4-0.5=
二、混合运算。
0.76+0.03+4.97-0.27-4.7346.6+11.2+20.8
75.9-30.26+54.0684.04+26.3+99.594.34-1.78-1.18
80-(2.09-0.29)89.4+(28.5-4.7)6.85-1.65-2.82
一、口算。
2.9+0.2=8.8+3.5=0.62-0.29=5.1+0.4=
7.5+0.1=7.3-0.7=0.85+0.29=1.9+0.1=
3.7+0.7=8.5-3=0.9-0.03=7+0.6=
2.9-0.3=8.4+3.2=0.7-0.42=4.8+0.9=
2.2+0.1=6.5+2.1=0.75-0.06=8.1-0.9=
6-0.6=6.6+1.5=0.68+0.14=8.1+0.7=
4.2+0.2=7.8+2.3=0.6+0.04=2.5-0.7=
2.6+0.3=7.7+0.6=0.77+0.02=4.9+0.3=
二、混合运算。
0.9+0.41+9.68.2-0.34-3.6665.3-21.8+28.2
77.84+30.1+18.1564.2+47.88+36.75.06-1.98+2.76
70-(9.45-0.78)72.5+(25+3.8)5.77+1.19+2.86
一、口算。
8.3-0.7=6.2+0.9=0.67+0.13=8.3+0.6=
8.8-0.1=8.1-4.4=0.83-0.24=5.7+0.4=
6.1-0.8=7.9+0.7=0.83-0.46=5.6-0.6=
4.4+0
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