人教版四年级数学下册小数加减法混合运算专项练习题71.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71
一、口算。
7.7+0.3=8.4-3.9=0.67+0.49=7.4+0.6=
8.1+0.8=6-4.9=0.86+0.2=8.8+0.4=
3.2-0.3=6.3+4.5=0.69+0.1=5.3+0.9=
1.2+0.7=6.2-3.7=0.67+0.19=5.8+0.7=
4.2+0.2=6.7+0.5=0.68-0.34=3.3-0.3=
3.5-0.5=8.3+0.3=0.62-0.44=3.2-0.5=
5.4+0.9=7.3-3=0.83-0.47=5.7-0.5=
1.2+0.1=7.4-0.9=0.69-0.27=8.1-0.9=
二、混合运算。
0.87+0.32+6.88.5-0.12-3.8875.6+12.6+59.5
61.43-46.43+67.2477.68+43.02+77.166.29+4.6-1.39
60-(1.33+0.2)71.9-(26.5-6.6)7.57-1.72-3.61
一、口算。
8.7-0.3=8.1+0.3=0.67-0.31=6.4-0.4=
6.6-0.7=6.2-0.1=0.6+0.39=1.8-0.6=
3-0.6=8.1-3.7=0.82+0.3=3.1+0.5=
7.2+0.4=7+1.8=0.69-0.43=5.2+0.7=
1+0.5=6.1+0.8=0.75-0.42=5.4-0.2=
5.6-0.7=6.8+0.4=0.84-0.02=1.6-0.4=
2.4+0.6=8.5+1.7=0.77-0.36=8.3-0.5=
2.5-0.6=8.4-4=0.62+0.08=7.2-0.8=
二、混合运算。
0.6-0.38+4.18-0.72-4.2891.2-57.8-13.8
77.17-30.02+56.0764.99-23.98+63.674.39+2.31+1.53
40-(1.44-0.35)76.7-(22.8+5.8)5.96-3.33+1.6
一、口算。
8.7-0.5=6.6+2.1=0.75+0.37=2.5-0.1=
5.8+0.5=8.8-0.1=0.71-0.15=7.5+0.4=
8.6+0.7=6.4-3.4=0.88+0.04=8.6+0.6=
1-0.9=7.5-3.2=0.84+0.27=7.9+0.9=
5.5-0.5=8.5-1.5=0.75-0.32=2.2-0.5=
6.9+0.3=6.3+3.2=0.71+0.08=5.1-0.6=
3.8-0.6=6.1-4.1=0.64+0.41=5.5+0.6=
7.7-0.7=6.5+0.8=0.61+0.44=4.4-0.3=
二、混合运算。
0.61-0.25+4.75.3-0.53-3.4736.7-19.3-16
79.58-48.18+48.7285.19-43.24+10.648.65+4.26-3.86
80-(4.93-0.24)66-(15+7.1)5.93+1.27+2.13
一、口算。
4.1-0.4=8.2-1.1=0.9-0.01=1.8+0.2=
6.4+0.7=8-4.6=0.77+0.23=4.7-0.8=
7.6+0.2=6.5-2.7=0.84+0.16=8.1+0.7=
3.9-0.7=8.7+1.3=0.76-0.28=2.7-0.5=
2.6-0.7=8.6+0.5=0.62-0.31=6.3+0.3=
3.5-0.6=8.4-3.3=0.87-0.11=7.2-0.1=
7.1+0.6=6.6-3.8=0.9+0.05=3.1+0.3=
2.3-0.1=8.1-0.8=0.83-0.4=3.9-0.6=
二、混合运算。
0.75-0.12+1.47.2-0.58-1.4279.4+48.5+15.9
86.1-18.88+25.2577.1-43.11+95.169.99+7.21+2.77
30-(7.02+0.79)86.9-(22.6-3.1)5.97+2.39-2.17
一、口算。
1.7-0.4=6.8-3.1=0.76-0.33=3.9-0.5=
1.1-0.7=6.1+4.5=0.73-0.09=8.8-0.6=
1.3+0.4=7.4-4.2=0.87-0.18=1-0.4=
5-0.1=6.5-4.2=0.62-0.29=5.6-0.4=
7.7+0.8=7.5+0.8=0.73-0.28=7+0.7=
6.7-0.8=8.6+4=0.69-0.31=4.7-0.8=
3.4-0.9=8.4-4.8=0.68+0.21=3.8+0.3=
3-0.9=8.8-4.4=0.85-0.1=1.7-0.5=
二、混合运算。
0.88+0.25+6.99.3-0.59-0.4135+10.2+10.2
88.12+11.22+80.0775.62+30.5+30.989.59+3.32-5.34
70-(7.21-0.32)75.2+(25.9-6.8)8.27-6.62+1.11
一、口算。
4.8-0.9=8.5-2.1=0.75-0.39=7.4+0.2=
2.4+0.9=6.3+3.9=0.63-0.1=6.2+0.6=
1.4+0.2=8.5+3.4=0.81+0.43=5.6-0.6=
7.9+0.6=6.4+0.3=0.73-0.47=4.6-0.3=
1.6+0.3=7.3-3.1=0.82-0.13=3.6+0.7=
1.9-0.4=7.7+0.7=0.85-0.19=6.1-0.6=
8.3-0.2=7-3.1=0.71-0.41=7.4+0.3=
5.9+0.2=6.9+2.2=0.74-0.21=4.9+0.3=
二、混合运算。
0.81+0.14+3.19.1-0.57-0.4356.8-33.6+12
80.96-30.4+48.8671.22-46.84+38.156.91-4.08+2.52
80-(9.57+0.45)66.6+(21.6-4.4)7.47-1.45+3.83
一、口算。
6.6-0.3=6.5+0.3=0.78+0.45=6.9-0.7=
4.1+0.3=8.1+0.2=0.73+0.48=3.4-0.1=
5.3-0.3=7.5+2=0.66-0.02=7-0.4=
6.1-0.6=7.1+0.5=0.72-0.3=8-0.2=
5.5-0.6=7.3-2.2=0.63+0.36=4.6-0.8=
5.7+0.7=6.1+0.6=0.88-0.09=3-0.1=
8.6-0.9=6.5-4.6=0.62+0.23=1.4+0.5=
1.6-0.6=7.6-0.4=0.87+0.07=7.7+0.3=
二、混合运算。
0.9-0.15+4.45.5-0.26-3.7457.1-12.5+26.3
77.23+26.06+55.8377.27-16.45+83.418.14+5.66-1.44
60-(8.09+0.72)77.2-(19.1-7.2)4.16-1.36-1.24
一、口算。
5.8-0.3=8.5+3.7=0.64-0.45=3.9-0.6=
5.2-0.7=6.7+2.1=0.67-0.48=2.8+0.9=
3.7+0.2=8.3+3=0.83+0.12=8.5+0.8=
5.2-0.1=7.9+0.3=0.62+0.04=1.3+0.6=
8.1+0.5=7.4-2.8=0.9+0.26=2.4+0.8=
3.2-0.9=7.3-3.6=0.86-0.44=6.1-0.8=
7-0.4=6.2-4.3=0.72-0.11=6.4+0.9=
7.6+0.3=7.4+4.6=0.73+0.11=1.7+0.7=
二、混合运算。
0.6+0.36+5.87.4-0.41-2.5996.4-21.9+20.1
62.22+18.89+34.783.58+46.14+61.026.35+3.95-1.76
20-(2.75+0.4)91.5-(23+7.7)4.74-1.96-1.87
一、口算。
3.3-0.4=6-1.7=0.85+0.09=2.8+0.5=
7.7+0.7=8.7-3.5=0.63+0.16=5.8-0.3=
5.7+0.1=7.9+3.2=0.81+0.31=1.3-0.5=
1.2-0.9=7.2-3.5=0.64+0.44=7.3+0.4=
2.7+0.4=7.8+3.6=0.85-0.09=6.5+0.2=
6.7-0.8=6.5+0.6=0.79+0.11=6.4-0.3=
4.1-0.2=7.4+1.2=0.9-0.16=5.1+0.1=
5.2+0.8=7.6-4.8=0.6+0.46=7.8+0.6=
二、混合运算。
0.76+0.07+3.79.9-0.5-0.589.5+18.8-21.3
63.02+28.07+18.2782.97+31.97+62.28.65+6.09+1.65
90-(1.8+0.82)94.6-(27.3-4.2)7.59+2.34-3.61
一、口算。
6.8-0.5=7.8+1.1=0.9-0.29=3.5+0.2=
5.6+0.9=6.9+3.1=0.66-0.2=6.1-0.8=
8.5-0.6=6.1-4.6=0.88+0.18=5+0.9=
1.6-0.2=8.2-1.4=0.78-0.37=4+0.8=
6+0.1=7.5-1.7=0.63+0.42=8.5+0.7=
1.4-0.9=6.6+1.3=0.85-0.43=3.3-0.3=
3.5+0.1=8.5+1.1=0.64-0.39=1.4-0.3=
1.2+0.9=8.3-3.1=0.73+0.03=2.6+0.9=
二、混合运算。
0.89-0.46+7.65.6-0.19-2.8159.7+12.5-17.8
72.18-41.17+98.2960.63-15.85+20.729.1+5.18+1.92
20-(9.5-0.28)92.2-(12+9.4)5.29+1.51+3.48
一、口算。
9-0.2=7.5-4.5=0.74-0.3=4.7-0.7=
8.5+0.1=6.6+3.1=0.76-0.11=7.3-0.7=
7.3-0.8=6.4-3.8=0.75+0.13=7.4-0.2=
6.3+0.9=8.5+4.3=0.87-0.27=8.7-0.5=
8.8+0.7=7.2-3.5=0.82-0.22=6.3+0.5=
6.4-0.6=6+3=0.74+0.37=7.4+0.4=
8.7-0.8=6-1.9=0.88-0.09=6.3-0.7=
3.4-0.9=6.2+4.9=0.62-0.28=8.2+0.6=
二、混合运算。
0.63+0.24+2.96.3-0.47-3.5359.6+14.7+26
81.67+28.7+12.8672.31-48.03+26.939.16-4.05-2.25
70-(7.62+0.57)83.8+(26.1-5.5)5.35+3.14+1.18
一、口算。
1.8+0.9=7.8+1.5=0.73+0.49=8.9+0.6=
3-0.2=6.6-0.4=0.66-0.13=5-0.7=
4.9-0.8=6.3-2.5=0.7+0.46=7.3-0.1=
8.1-0.9=7+1.2=0.75+0.17=6.8+0.1=
2.3-0.2=6.1-1.2=0.74-0.17=5.1-0.8=
4.5+0.1=6.4+2.8=0.64+0.45=4.1+0.9=
3.5+0.9=8.2-3.7=0.71+0.36=8.6+0.6=
7.5-0.4=8.5-2.3=0.81-0.01=2.8-0.3=
二、混合运算。
0.72-0.3+4.25.1-0.24-2.7662.6-37.5-16.6
61.01-23.78+78.865.58-27.13+22.079.15+1.02+2.78
60-(4.91-0.75)96.4-(26.1+5.9)8.56+1.25-1.19
一、口算。
4.4+0.4=6.9-4.8=0.78+0.11=2.4-0.3=
5.7-0.5=8.1-4=0.77-0.36=7.6-0.1=
6.2+0.4=8.2-4.4=0.71+0.21=7.4+0.3=
3.8+0.1=7.5-1=0.72+0.15=4.8-0.1=
2.7+0.5=8.6+2.3=0.61+0.49=2.6+0.8=
6.3-0.7=8.6-1.8=0.73-0.29=4.3-0.7=
7.5+0.7=7.2+3.7=0.66-0.45=1.2-0.5=
2.5-0.6=7.4+0.5=0.76+0.25=1.3-0.7=
二、混合运算。
0.83+0.27+5.98.1-0.35-3.6573.6-58+14.7
79.96+23.99+35.0885.46+45.98+41.655.68+3.96+1.27
20-(3.54-0.31)69.4+(29.4+7.1)5.44-1.18-3.74
一、口算。
4-0.4=6.3-4.2=0.68+0.49=4.1-0.5=
3.5-0.4=7.8-1.5=0.84-0.49=7.9+0.2=
2.4+0.5=7.9+4.5=0.75-0.18=6.3+0.1=
3.7+0.8=8.5-1.8=0.8+0.16=3.2-0.4=
1-0.4=8.2+3=0.84+0.07=3-0.1=
5.9-0.7=7.1-1.9=0.8-0.25=4.8-0.9=
4.7+0.2=6.3+2.3=0.66+0.05=4.7+0.5=
1.7+0.8=6.2-2.1=0.82-0.33=6.3-0.4=
二、混合运算。
0.87+0.12+4.46.1-0.14-0.8643.3-23.1-17.5
86.4-32.14+66.5381.95+47.04+49.915.44+1.91+3.35
60-(5.95+0.99)82.3+(17.3+5.3)8.25+3.97+3.28
一、口算。
7.6-0.7=7.5+2.6=0.76-0.22=8.5-0.7=
4.3-0.2=7.9+2.6=0.77-0.23=2.1-0.6=
3.1-0.3=7+4.7=0.63-0.22=2.3-0.2=
4.7-0.6=8.3+1.2=0.85-0.35=8.7+0.6=
5.6+0.6=7.3+0.4=0.66-0.34=6-0.3=
3.2-0.9=8.7+2.7=0.71+0.48=6.9-0.3=
3.9+0.1=7+4.3=0.73+0.19=5.7-0.7=
4.6+0.8=6.2+1.7=0.73+0.18=1.9-0.9=
二、混合运算。
0.62-0.21+7.38.3-0.66-4.3495.8+69+24.4
70.05-35.66+15.1862.61+10.44+83.678.08-2.62+1.65
20-(6.06+0.23)78.8-(14.2-4.8)3.99-2.21+1.75
一、口算。
4.4-0.6=7.9+3.2=0.6+0.3=7.3+0.8=
4.2+0.8=8.1+1.4=0.65+0.4=6.2-0.1=
4.4-0.2=8.7-2=0.85-0.19=3.2-0.5=
8.1+0.3=7-4.4=0.76-0.12=4.2-0.2=
5.8-0.7=8.6-1.5=0.8-0.21=2-0.7=
3.7-0.6=7.8-2.4=0.88-0.35=8.6-0.3=
3.8-0.1=8.9+2.7=0.73-0.18=8.9+0.5=
5.3-0.4=8.9-1.6=0.87+0.39=4.8+0.6=
二、混合运算。
0.83-0.29+2.37.7-0.53-0.4736.1+16.8-10.3
65.36-17.26+77.7165.6+19.79+50.26.32-4.29-1.9
30-(2.39+0.5)66.9+(18.8-9.3)5.18+1.44+2.54
一、口算。
5.4-0.3=7.2+4.9=0.87-0.25=8-0.8=
1.3+0.1=9+3.2=0.78+0.07=4.8+0.4=
3.8-0.2=7.8-2.6=0.75-0.39=5+0.4=
2.9-0.5=8.9+3.4=0.81+0.37=4+0.4=
5-0.6=8.5-1.7=0.84+0.31=5-0.1=
6.8+0.7=8.2+3.8=0.69-0.44=4+0.4=
6.8+0.4=8.6-0.1=0.81-0.48=6.4+0.9=
1.8+0.2=8.5-2.4=0.62-0.32=5.7-0.4=
二、混合运算。
0.75+0.05+2.16.5-0.88-3.1288.1-59.7+20.8
89.01+38.89+99.4484.96+36.04+89.357.94-3.44+4.48
20-(8.71-0.16)92.4+(10.6-5.8)6.9-1.23-5.38
一、口算。
8.2+0.8=6.1+0.3=0.79+0.26=3.4-0.2=
2.2+0.1=8.9+4.4=0.61-0.09=7