人教版四年级数学下册小数混合运算综合练习题20.docx
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人教版四年级数学下册小数混合运算综合练习题20
一、口算。
2.9+0.7=7.7+4.1=0.72-0.26=1.5-0.6=
7.2+0.7=7.9+0.2=0.89-0.2=4.1+0.4=
5.1+0.6=7.7+1.4=0.79-0.14=4.6+0.6=
7.3-0.8=6.9+3.8=0.9+0.39=8.5+0.1=
5.8-0.3=6.9+0.9=0.68+0.47=2.7+0.8=
3.6-0.9=6.1+0.9=0.61+0.02=5.5-0.5=
7.1-0.9=7.3+1=0.8-0.4=8.3-0.9=
7.8+0.3=8.9+4.5=0.78-0.41=7.1+0.5=
二、混合运算。
0.8-0.34+3.88.9-0.48-0.5249.8-22.5+20.7
82.44+12.82+64.7683.82+20.76+87.344.87-3.16-1.44
30-(8.72-0.71)99.2-(16.3+1.7)9.55-6.17+3
一、口算。
6+0.5=8.4+1.6=0.73-0.49=2.5+0.7=
4.9-0.4=6+4.4=0.67-0.43=3+0.8=
3.6-0.4=6.9-2.7=0.76+0.33=1.7-0.7=
1.3-0.9=6.8+3.8=0.6+0.32=2.9+0.5=
8.3+0.5=7.7-2.2=0.89+0.47=5.3-0.5=
4+0.5=6.7+1.6=0.83+0.45=8.8-0.7=
8.8+0.7=6.7-3.4=0.88-0.49=8.8+0.8=
7.5+0.7=7.1+1.3=0.69-0.17=8.8-0.2=
二、混合运算。
0.75+0.11+4.55-0.38-1.6243.7-16.8-13.3
70.32+11.7+62.2664.41+11.94+70.039.57-6.13+1.69
80-(1.06-0.98)67.3+(11.6+1.8)8.8-2.52-6.09
一、口算。
1.6+0.3=8.1-0.1=0.89-0.15=3.3-0.6=
1.6+0.6=6.9+0.8=0.82+0.26=6.7+0.3=
6.5+0.2=7.2-2.6=0.82-0.09=3.5-0.8=
2.2-0.8=7.5-0.5=0.8+0.24=7.7+0.2=
5.8-0.7=8.7-1.9=0.62-0.09=7.7+0.2=
3.2+0.1=8.5-0.1=0.9+0.12=3.7-0.5=
8.6+0.2=6+4=0.75+0.39=4.9+0.1=
7.9+0.2=6.4+3.8=0.65+0.2=3.1+0.1=
二、混合运算。
0.68-0.27+0.15.3-0.23-0.7751.4+12.3+12.1
66.34+36.98+16.9384.7+33.59+85.696.34+3.66-1.71
70-(5.51-0.78)60.8-(26.8-6.6)5.53-3.41+1.83
一、口算。
5.2-0.6=6-0.8=0.86+0.35=3.6-0.9=
5.4+0.3=7-2.4=0.67-0.07=4.4-0.5=
6.6+0.9=7.2+0.3=0.71+0.43=1.8-0.4=
1.7+0.9=6.9+0.4=0.64+0.41=4.6+0.1=
8.9-0.6=7.3-3.8=0.81-0.15=5.4-0.4=
8.1-0.8=8.6+4.6=0.68-0.23=6.5+0.4=
7.2+0.7=6.6+4.9=0.74-0.22=3.5-0.8=
8.5-0.7=6.6+3.4=0.62+0.48=5.6-0.6=
二、混合运算。
0.73+0.13+3.45.5-0.44-3.5636.8-16.6+14.5
84.72-38.83+17.5571.81-37.89+53.769.75+7.62-1.66
60-(4.87-0.78)99.4-(22.7-8.6)5.77-1.41-1.17
一、口算。
2.8-0.3=8.8-0.8=0.88+0.11=8.6-0.4=
3.1+0.3=6.9+3.4=0.6-0.07=6.6+0.3=
6.4-0.7=8.4+4.3=0.8-0.29=4.2-0.5=
7+0.2=7-2.1=0.81+0.41=3.4+0.9=
8.3+0.5=8-1.1=0.73+0.44=4.5+0.7=
5.3+0.8=8.3-0.2=0.86+0.08=3.7+0.3=
4.9+0.8=8.4-1.4=0.9+0.49=9-0.7=
8.7+0.7=6.2-4.1=0.76-0.47=2.1-0.9=
二、混合运算。
0.75-0.04+0.69.9-0.8-1.273.9-33.9-19.6
74.56-20.15+41.9366.35-37.72+41.959.33-1.38+2.62
20-(6.85+0.93)95.7+(24.3+3.3)5.41-2.2+1.05
一、口算。
8.3+0.3=6.2+3.2=0.73+0.13=1.6-0.4=
4.5+0.5=7.9-2.4=0.89-0.2=5.7+0.9=
6.6-0.9=6.6+3.1=0.85-0.14=6.3-0.3=
7.3+0.6=7+2.9=0.83+0.24=1.5-0.8=
2.6-0.8=6.2-2.1=0.69-0.46=5.3-0.8=
3.9-0.4=6.7+0.9=0.85-0.33=5.8+0.3=
1.3+0.8=6.7-4=0.79-0.21=8.2+0.4=
2+0.4=7.4-0.3=0.74+0.4=3.9-0.4=
二、混合运算。
0.72-0.03+1.65.3-0.39-1.6151.3+16.5-23.1
80.29-14.69+72.8580.17-36.63+15.469.99-6.93-2.44
60-(2.02+0.29)87+(13.8-7.6)7.78+4.37+1.01
一、口算。
5.4-0.3=8.6+3.8=0.77+0.32=9-0.2=
6.7+0.5=7.9-0.8=0.71-0.32=1.6-0.5=
6.5+0.8=7.2-1.3=0.87+0.3=5.6+0.1=
3.2-0.6=9-1.3=0.65-0.05=8.8-0.5=
2.1-0.9=8.5-4.2=0.87+0.33=1-0.9=
7.6+0.2=8.3+4.3=0.79+0.09=7.9+0.6=
8.2-0.4=7.3+4.6=0.76-0.29=4.8+0.1=
6.6+0.6=7.8+1.9=0.68+0.29=6.6-0.3=
二、混合运算。
0.79+0.4+7.75.3-0.39-1.6173.5+19.1+24.1
77.01+47.66+50.7972.88+32.48+33.935.49-2.67-1.51
20-(1.12-0.29)66.4+(26.3+5.7)6.32+1.19-4.49
一、口算。
7.5-0.7=8.3-4.6=0.9-0.48=2.3+0.8=
5.2+0.7=6.1-2.2=0.77+0.37=6.5-0.6=
1.3-0.2=7.5+2.5=0.87+0.41=8.7-0.6=
4.4+0.3=6.1+3.2=0.71-0.39=1.4+0.6=
4.2-0.8=8.6-2.7=0.83+0.19=8.1+0.4=
4.1-0.2=8.3-1=0.67+0.29=8.6+0.4=
3.7+0.5=7.5+3.5=0.69+0.4=2+0.2=
5.4+0.6=9+4.6=0.82+0.02=1.8+0.6=
二、混合运算。
0.82+0.46+8.56.3-0.51-3.4999.1-61.1+29
69.63+47.63+91.3367.75-32.83+76.268.38+3.78+2.66
50-(2.52-0.34)89.5-(16.1-8.4)5.71-2.34+2.23
一、口算。
1.3-0.8=9-2.4=0.88+0.38=1.9+0.9=
8.5+0.9=9+1.9=0.71+0.22=7.1+0.6=
1+0.8=7.4+3.8=0.64+0.4=8.9+0.3=
1.5+0.8=9+1.7=0.83+0.07=4+0.5=
7.7+0.9=6-4=0.87+0.37=5.5-0.2=
1.5-0.5=6.3+0.5=0.6-0.43=4.5+0.1=
3.1+0.3=7.2-1.6=0.69-0.02=6.8+0.1=
6.8-0.4=6.7+3.4=0.85-0.11=5.5+0.5=
二、混合运算。
0.85-0.28+7.78.5-0.24-0.7645.8-24.9-16.1
66.57+41.37+38.668.31-13.49+85.138.85+1.04+2.04
80-(7.99+0.77)65.6+(18-8.2)6.56-3.27-2.3
一、口算。
4.6+0.7=8.1-1.8=0.88+0.42=4.5+0.3=
7-0.9=7.3-1=0.81+0.41=3.5+0.1=
8.3-0.3=7.9-3=0.68-0.41=4.1-0.8=
7.1-0.4=7.6+0.1=0.86+0.18=6.6-0.6=
5.9-0.7=7-1.4=0.9-0.4=3.3+0.1=
1.4+0.4=7+2.4=0.86-0.38=8.3+0.9=
3.7-0.2=6.6-0.9=0.62-0.1=5.2-0.6=
4.1+0.9=8.9-4.1=0.88-0.4=3.3-0.7=
二、混合运算。
0.76-0.22+6.76.7-0.45-1.5557+29.5-17
80.11+21.02+74.5984.11+24.49+66.556.98-4.09+1.47
70-(7.87-0.84)77.7-(24.2+5.5)5.85+1.69-2.75
一、口算。
5.7+0.6=7.2-1.7=0.78+0.03=2.2+0.7=
4.7+0.1=7-3.9=0.84+0.29=2.6+0.5=
5.5-0.9=7.5+0.6=0.84+0.13=2.7+0.3=
1.6-0.9=8.5-1.9=0.89+0.42=5.7+0.8=
1.8-0.3=7.8-4.7=0.8-0.21=4-0.3=
1.4+0.8=6.7+1.2=0.84+0.43=6.6+0.8=
7.2+0.5=7.1+4.1=0.67+0.06=5.8+0.3=
1.3+0.3=7.2+2.9=0.85+0.4=5.8-0.8=
二、混合运算。
0.79-0.39+0.85.5-0.68-0.3269.9-45.1-13.5
75.48+35.29+58.7787.12-29.45+37.687.54-2.98+3.76
40-(7.09+0.94)98.2-(25.9-4.3)5.89+4.25+1.27
一、口算。
4.6-0.2=6-4.7=0.63+0.2=1.3+0.3=
3.6-0.8=7.5+1.1=0.7-0.29=8.6-0.7=
6.8+0.4=9+0.3=0.68-0.33=5.3+0.3=
3.1+0.1=8.5+4=0.8-0.49=1.5+0.5=
1.8-0.1=7.6+0.1=0.65+0.15=4.6-0.9=
7.6+0.6=8.4-0.9=0.6-0.33=2-0.1=
3-0.7=6-3.4=0.67+0.37=2.6+0.3=
4.1-0.2=7.8-1=0.81-0.06=3.3-0.7=
二、混合运算。
0.77+0.12+7.79.8-0.27-3.7337.3+16.7+10.5
66.45-11.86+21.9162.77-30.08+39.173.94+1.15+2.64
70-(2.58+0.46)87.3-(10+1.9)8.25-6.09-1.89
一、口算。
6.6-0.8=7.9-1.8=0.75+0.2=8.9-0.6=
5.4-0.4=6.2+4.7=0.78+0.14=5.2-0.7=
7+0.4=7.2+2.4=0.71-0.39=6.6-0.7=
4.8+0.8=6.5-4.5=0.68-0.36=2.2+0.9=
1.4-0.8=7.3-1.2=0.66+0.27=5.9-0.4=
5.5+0.5=8.1-3.7=0.79-0.04=1.6-0.3=
3-0.2=6.6-0.4=0.76-0.22=4.7-0.6=
1.4-0.3=8.3+2.9=0.78+0.31=3-0.3=
二、混合运算。
0.84+0.1+8.39.7-0.56-1.4498.2+16.4+39
76.99+26.53+68.5180.3-43.09+20.457.19+1.16-3.16
50-(9.02+0.47)91.7-(17.4+2.4)5.33-2.83+1.01
一、口算。
4.6-0.5=7+0.3=0.71+0.45=1.4+0.8=
3.9+0.6=6.4+2.7=0.6-0.41=7.6+0.4=
1.6-0.7=8.1+2.9=0.87-0.09=1.5-0.1=
7.9+0.1=8.2-0.2=0.65+0.06=7.6-0.3=
6.7+0.6=8.8+4.1=0.68-0.27=1.7+0.9=
6.1+0.9=6.9+4.4=0.81-0.11=4.9+0.4=
6.3+0.8=7.2+0.1=0.88-0.2=8.9+0.9=
7.1-0.6=7.8-1.1=0.88+0.34=2.6+0.2=
二、混合运算。
0.65+0.23+6.85.8-0.79-2.2141.7-14.5-23.7
75.3+36.16+71.9277.65-26.51+84.037.17+5.4+1.71
90-(3.22+0.24)65+(11+1.1)8.89-6.58-1.98
一、口算。
4.9-0.4=7.1+0.1=0.62+0.35=8.1-0.1=
3.1+0.3=8+3.8=0.61-0.08=2.1+0.2=
7.6+0.5=6.5+4.6=0.84+0.4=1.2+0.2=
5.3+0.1=7.3+2.6=0.84+0.11=6.6-0.7=
2.4+0.4=8.1+4.1=0.84-0.4=4.5-0.1=
3.3+0.2=7.4+0.9=0.86-0.04=8.1+0.4=
3.9-0.6=8.5-3=0.73-0.36=4.2-0.3=
8.3+0.1=7.6-3.9=0.78+0.33=7.3-0.6=
二、混合运算。
0.8+0.18+5.25.8-0.67-1.3335.1-14.6-18.9
77.97-46.16+22.4170.1-42.27+28.247.5+2.39+1.32
40-(5.15-0.22)96.3+(19.6-4.9)4.71-1.05-2.73
一、口算。
8.2-0.8=7.8+0.1=0.65-0.43=2.7+0.2=
6.2-0.1=8.9-4.5=0.79-0.34=5.4-0.5=
4.5+0.1=6.7-0.2=0.67+0.22=2.1+0.2=
4.3-0.6=8-1.4=0.76-0.38=6.7-0.8=
7.7-0.5=9+2.8=0.76+0.01=2.2-0.5=
3.1+0.1=6.6-4.5=0.65-0.33=5.1+0.4=
1.5+0.9=6.9+0.8=0.7-0.13=2+0.4=
4.7-0.7=8+0.1=0.76-0.43=3.7-0.9=
二、混合运算。
0.63-0.11+7.86.4-0.31-2.6938.4+15-16.7
60.75+40.83+87.8561.9-31.44+36.57.65-1.73+1.58
20-(7.18-0.34)97-(22.8-1.3)4.61-2.1+1.67
一、口算。
6.6-0.4=7.7+1.3=0.62+0.09=4.2-0.6=
7.1-0.1=8.2+3.9=0.78+0.17=4.1+0.5=
7.2+0.1=7.1-1.3=0.65-0.09=2.2-0.9=
4.3+0.8=9-0.5=0.88+0.17=4.6-0.4=
1.3+0.2=8.6+0.4=0.8-0.38=8.8-0.3=
7.8+0.4=6.2+1.1=0.78-0.44=6.4-0.9=
3.8+0.8=8.2-2.8=0.68+0.21=4.2+0.6=
3.8+0.4=6.9-2.9=0.75+0.33=3.4-0.4=
二、混合运算。
0.87+0.2+6.29.6-0.44-3.5689.5-41.7+15.8
86.85+40.41+16.9980.41+16.56+27.566.38+4.61-1.61
80-(8.29-0.8)68.3-(27.5-4.5)6.65+3.86+1.62
一、口算。
8.8+0.1=8+1.6=0.86+0.22=5.5-0.5=
6.9-0.9=9+1.5=0.74-0.47=6.5+0.1=
8.7-0.9=8.2-4.6