人教版四年级数学下册小数加减法混合运算专项练习题66.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66
一、口算。
4+0.9=7.3+1=0.77-0.32=6.9+0.7=
3.7+0.6=8.1-3.8=0.86+0.36=1.1-0.3=
8.9-0.5=8.2+0.9=0.62+0.02=7.6+0.8=
3.5+0.2=6.6-3.8=0.81-0.24=1.5+0.1=
6+0.5=6+2.4=0.65+0.49=4.2-0.1=
8.9+0.9=7.4+2.6=0.88+0.4=5.3-0.7=
4.2-0.5=7.4-3=0.82-0.46=4.6-0.5=
5.6-0.1=8+1.4=0.89+0.02=3-0.8=
二、混合运算。
0.65-0.23+0.36.2-0.66-0.3480.4+25.5+28.5
80.15-46.36+59.9688.56-13.58+60.024.04-1.41-2.08
90-(9.87-0.48)91.8+(16.5-6.1)4.52+3+1.49
一、口算。
6+0.5=7.2-2.6=0.8+0.26=3.3-0.1=
1.9-0.8=6.1-4.8=0.88-0.07=4.9-0.3=
8.9-0.3=8.5-0.1=0.77-0.37=1.5+0.1=
6.7+0.6=8.4+3.3=0.6+0.15=2-0.2=
3-0.3=8.6-3.3=0.65-0.05=2.1-0.9=
5.1-0.9=6.9+4.8=0.64+0.04=2.2-0.8=
4.2+0.7=6.9-4.9=0.8+0.23=6.3+0.3=
5.1+0.7=7.5-2.9=0.66-0.2=1.5+0.6=
二、混合运算。
0.66+0.09+6.76.6-0.29-0.7135.8-11.1-10.1
67.74-17.57+21.1669.38-29.77+89.184.41+2.68+1.44
90-(5.23+0.53)75.8+(26.2+5.1)6.7-1.11+3.05
一、口算。
7.7+0.5=6.4-1.5=0.89-0.29=3.4-0.4=
3.4-0.4=6.1+1.2=0.81+0.28=3.9-0.1=
5.2-0.1=6.6+0.9=0.83+0.42=4.9-0.7=
2.1+0.1=7.9+2.5=0.89+0.42=8.7+0.8=
8.1+0.2=7.1+4.9=0.76+0.41=4.9-0.1=
6.1+0.6=7.9+2.9=0.63-0.42=4.6-0.8=
1.3-0.4=9-3.7=0.81-0.41=2.7-0.2=
8.5-0.1=6.6+2.6=0.84+0.45=9+0.5=
二、混合运算。
0.86-0.09+2.77.2-0.83-4.1791.6-53.9-32.7
64-45.2+51.1778.11+41.49+66.018.62+6.48+1.9
30-(3.62+0.42)67.9-(25.4-6.5)9.23+3.43+4.46
一、口算。
2.5+0.6=6.6-0.3=0.87+0.22=5.7-0.6=
2.2-0.4=6.2-4.5=0.74+0.4=4.7+0.1=
8-0.2=8.5-1.4=0.76-0.2=6.1-0.5=
5.4-0.4=7.6-2.2=0.88-0.36=7.7-0.9=
3.7+0.2=7.2+1.5=0.63-0.44=7.6+0.2=
6.2-0.8=6.6+0.6=0.67-0.1=3.4-0.7=
3.6-0.3=6.9-1.7=0.6-0.34=8.5+0.9=
5.1-0.3=8.5+1.1=0.85+0.32=3.9-0.8=
二、混合运算。
0.7+0.11+5.95.1-0.89-0.1146.2+19.3-10.9
80.71-34.82+70.0681.78-34.71+49.754.34-1.59+1.86
70-(1.15+0.49)64.4+(16.3-8.9)4.4-1.36-2.49
一、口算。
5.7-0.9=7.6+1.9=0.83+0.3=5.4+0.5=
3.2+0.1=8.1+3.6=0.9+0.4=2.3+0.3=
6.9+0.4=7.2+2.6=0.87+0.15=7.7+0.9=
2.1-0.3=8.4+4.1=0.75-0.13=3.3-0.5=
4.1+0.6=6.7+4.4=0.81-0.17=8.5+0.5=
3.2+0.5=8.6+1.2=0.84-0.27=6.3-0.5=
8.8+0.7=8.9-1.5=0.85+0.38=3+0.2=
3.3+0.5=8.6-3.8=0.7+0.36=7.7-0.8=
二、混合运算。
0.77-0.04+4.25.1-0.66-0.3488.9+19.3+54
69.52-24.28+21.4778.13-31.53+94.444.87+2.07-1.89
70-(6.69-0.96)83.8-(13.2+5.6)5.44-2.48+1.17
一、口算。
6.2-0.1=6.3-1.9=0.63-0.32=2.5+0.6=
5.4+0.7=8.7-1.2=0.81-0.4=8-0.4=
1.5+0.9=6.4-3.1=0.66+0.34=8.3+0.2=
8.5+0.2=8.6-0.6=0.7+0.28=7.9-0.2=
1.6+0.8=7.3+1=0.67+0.28=3.1-0.4=
1.7-0.9=7.7+1.7=0.73-0.27=8.7+0.1=
6.7+0.1=7.7+4.7=0.81-0.21=8.7+0.1=
1.6+0.6=7.9+2.4=0.8+0.28=2.3-0.9=
二、混合运算。
0.61-0.23+7.75.6-0.52-2.4883.3-12.1-28.4
61.13+38.09+46.5172.26+13.13+18.843.9+1.54+1.03
80-(5.27-0.56)65.5-(11.9+1.5)6.98-1.76-4.43
一、口算。
5.1+0.1=6.7-2=0.66+0.16=8.5-0.5=
6.5+0.3=8.5+4.8=0.85-0.22=7.3-0.8=
6.7-0.1=8-1.5=0.8-0.43=6.9-0.4=
7.9-0.1=6.2-2.7=0.62-0.19=7+0.5=
2.7-0.4=6+1.9=0.69+0.43=6.2+0.8=
3.4+0.7=6.3+2.8=0.85-0.44=7.2+0.1=
5.1-0.9=7.6-1=0.82+0.15=2.1+0.2=
2.7+0.1=8.1-3.5=0.77+0.24=4-0.2=
二、混合运算。
0.84+0.27+5.85.3-0.77-3.2379+55.1+12.5
80.31-20.9+39.7685.34-10.07+13.646.27+1.65+2.16
70-(9.61+0.37)69.1+(25.6-3.6)5.44-3.53+1.73
一、口算。
5.8-0.8=8.4-3.2=0.73-0.31=1.2+0.6=
4+0.3=6+1.5=0.86+0.21=1+0.2=
3.5+0.9=7.9+4.8=0.65+0.39=7.9-0.1=
6.3-0.4=8.1-0.2=0.86+0.42=6.8+0.7=
1.5-0.2=6.3+1.7=0.66-0.31=3.8+0.1=
8.1+0.3=7.6+3.5=0.64-0.12=7.1-0.5=
1+0.5=6.3-1=0.87-0.14=2.9-0.8=
4.9+0.7=6.8+3.5=0.86+0.49=4.9-0.6=
二、混合运算。
0.61-0.45+1.29.7-0.79-1.2174.5+34+26.5
69.96+14.67+76.1877.73-11.9+63.278.24-6.45-1.72
70-(1.56-0.97)87.1+(20.3+7.3)5.07+1.6+2.65
一、口算。
6.6+0.3=8+0.7=0.83+0.28=4.5+0.5=
2.9-0.9=7.2+0.6=0.67-0.17=6.9+0.1=
3.6+0.2=8.7-2.9=0.64+0.38=4.7+0.4=
2.9-0.6=6.5+4.3=0.76+0.37=7.9+0.3=
2.9-0.7=6.5-4.4=0.82-0.44=7.9-0.3=
5.9-0.7=6.7-3.9=0.74+0.34=8.6+0.3=
4.7-0.8=8.8-0.6=0.74-0.05=7.6-0.1=
5.4-0.3=9+0.2=0.67-0.31=8.2-0.6=
二、混合运算。
0.84-0.32+3.67.2-0.49-4.5168.7-47.8-11.5
67.5-46.21+35.6188.99-42.81+54.878.88+1.85-7.03
90-(5.86-0.7)91.5+(29.6-3)7.24+4.08-1.41
一、口算。
6.2+0.8=7.5+3.6=0.69-0.04=3.5+0.3=
1.8-0.8=8.8+1.2=0.63+0.29=8.2+0.3=
8.9+0.3=6.2+1.3=0.63+0.48=2.8-0.2=
2.5-0.6=7.2-2.5=0.82-0.35=6.6+0.7=
5.6+0.8=6.7+3.7=0.73-0.24=5.3-0.7=
5.9-0.2=6.2-2.2=0.74+0.06=1.2-0.6=
3+0.4=8.8-4.9=0.78+0.4=3.7-0.8=
4.4+0.4=6.1-2.6=0.85-0.15=4.5-0.6=
二、混合运算。
0.8-0.33+5.85.3-0.8-2.257.5-11.2-37.6
64.26+22.27+44.8172.24+29.59+90.869.17-7.28+1.63
80-(3.09+0.53)72.8+(14.9-1.2)4.83+1.31-1.16
一、口算。
3.5-0.7=8.6+0.6=0.85+0.04=8.7+0.6=
3.5-0.3=7.4+1.4=0.62-0.37=2.4-0.1=
4-0.3=8.1+2.5=0.89+0.28=7.6-0.4=
6.3+0.7=8.7+1.9=0.79-0.22=2.3-0.2=
1.5-0.9=6.8-2.2=0.6-0.24=8.6+0.2=
3.3+0.8=6.9-4=0.83-0.21=1.5-0.8=
2+0.3=7.6+0.8=0.84-0.09=1.6+0.7=
6.9+0.9=7.9-4.6=0.89+0.26=1.8-0.5=
二、混合运算。
0.7-0.01+3.57.4-0.31-0.6968.1-51.9-11
81.75+23.13+98.5178.93+29.99+65.259.74-7.57-1.15
50-(5.8+0.52)75.7+(15.2+5.1)6.82+2.25+1.06
一、口算。
6.4+0.7=6.5-1=0.9+0.43=3.8-0.7=
5.5+0.1=6.7+3=0.77+0.05=6.1-0.1=
8.5+0.3=8.9-1.6=0.65+0.17=7.3+0.3=
2.5+0.9=7.7+2.2=0.71+0.47=5.7-0.9=
3.2-0.5=8.4+3.5=0.76+0.41=5.3+0.4=
8-0.4=9+0.2=0.75+0.25=7.7-0.4=
7.2+0.1=8.9+4.7=0.6+0.06=5.8-0.1=
2.9+0.6=8.4-1.6=0.64-0.33=5.1+0.3=
二、混合运算。
0.77+0.21+8.95.9-0.56-3.4498.3-48.8+45.8
68.02-32.82+62.263.01+18.29+748.73-1.17+4.5
90-(2.83-0.46)94-(13.7-5.4)3.64-1.58-1.15
一、口算。
1-0.5=7.3+4.6=0.89+0.48=7.3+0.4=
6.7-0.5=8.1-0.9=0.68-0.31=2.1+0.9=
1.1-0.9=8.5-0.2=0.8-0.14=8.6+0.9=
8.6+0.1=6.4-0.6=0.88+0.14=5.4-0.2=
8.3-0.8=9+1.4=0.88-0.16=4+0.6=
5.4+0.1=8.6+4.4=0.65+0.19=8.5-0.3=
3-0.9=6.7-2.9=0.78-0.3=5.8-0.7=
1.2-0.5=6+4.7=0.72+0.46=1.9+0.3=
二、混合运算。
0.89-0.03+39.9-0.25-1.7571.7-32.8+15.6
63.42-14.27+81.5869.71+47.89+89.866.12+3.07-2.99
50-(5.6-0.25)89.1+(16.8+4)5.88+3.42+1.31
一、口算。
7.1+0.5=6.5-0.7=0.82+0.12=4.8-0.9=
6.6+0.6=9-4.1=0.81+0.3=1.4+0.3=
8.2-0.6=7.5-4.6=0.71-0.05=6.7-0.3=
1.7+0.8=6.4-1.8=0.9-0.44=8.3-0.9=
2-0.1=8.2-2.6=0.8-0.03=7.4+0.4=
4.9+0.5=8.2-2.1=0.84-0.29=4.1-0.1=
3.9-0.8=8-0.8=0.87+0.32=4.3-0.2=
1.7-0.8=8.8-2.9=0.73-0.09=3.4+0.1=
二、混合运算。
0.87-0.23+8.26.9-0.32-1.6873.6-49.7+18.6
62.2+24.02+72.4160.64-36.57+37.827.05+2.34+1.54
70-(1.68-0.8)85.1-(14.7+5.2)8.51-4.48+1.04
一、口算。
8.9-0.5=8+2.3=0.83+0.14=1-0.1=
4.3-0.7=8.6-0.1=0.65-0.03=5.8+0.3=
2.9+0.1=7.7+0.7=0.67-0.02=8+0.8=
5.9-0.7=8.4+0.3=0.61-0.47=4.7+0.9=
2.1+0.6=7.6+0.4=0.87-0.15=5-0.7=
5.5-0.2=6.2-4.7=0.84+0.14=8.1-0.6=
4.1+0.3=7.6-0.7=0.68-0.44=2.2+0.8=
2.8+0.1=7.1+4.7=0.82+0.03=6.4-0.3=
二、混合运算。
0.73+0.01+5.37.9-0.11-4.8935.5-13.8-12.9
71.4+43.23+12.8865.83-25.97+89.766.72+1.44-1.6
30-(6.25-0.67)61-(25.9-2.9)4.48+1.14+1.54
一、口算。
4.5-0.7=7.4+1.4=0.76-0.21=6+0.6=
3.5+0.6=7.4-4.5=0.67-0.42=4.8+0.2=
3.8+0.4=6.4+3.2=0.66-0.36=7.6-0.8=
5.1-0.6=7+0.4=0.81-0.28=1.6+0.1=
6.3-0.9=7.6-1=0.61-0.31=6.3-0.5=
5.6-0.4=6.7-4.5=0.84-0.03=5.1-0.7=
8.6+0.6=6.7-0.2=0.79-0.3=4.8+0.5=
8.9-0.3=6.6+2.3=0.82-0.13=2.1+0.2=
二、混合运算。
0.81+0.28+8.59.3-0.26-2.7467.7-22.6-18.8
73.42+21.08+67.2587.06-12.91+37.644.26+1.88+1.22
90-(1.32-0.7)92.5+(29.6+5.4)4.16+1.84+1.4
一、口算。
7.4-0.9=6.2-3.9=0.73-0.46=8.3+0.4=
6.6+0.2=7.6+0.3=0.61+0.27=5.1-0.8=
3.6+0.9=8.6-3.1=0.69-0.49=6.1-0.8=
3.2+0.3=6.9-2.7=0.64+0.34=5.8-0.6=
3-0.8=8.8-0.1=0.66+0.14=6.2-0.6=
5.9+0.1=8.2+0.3=0.85+0.11=2.3-0.6=
3.8-0.6=7.6-0.2=0.85-0.45=2.3+0.1=
5.3-0.7=7.7+4=0.63-0.45=4.6+0.1=
二、混合运算。
0.79+0.23+2.45.9-0.42-0.5849.9+19.9-17.2
73.11-22.1+63.2872.59+11.19+86.734.29-1.35-1.56
50-(1.01+0.58)99+(15.4+1.7)5.4-2.58-1.19
一、口算。
8.9+0.9=6-3.9=0.72-0.26=8.3+0.9=
3.8-0.5=7.1-0.7=0.76-0.38=4.9+0.8=
2.1-0.2=6