人教版四年级数学下册小数混合运算综合练习题18.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18
一、口算。
7.1+0.9=6.6+0.6=0.83+0.01=5.4-0.8=
6.3+0.4=6.3-0.2=0.73-0.03=3.7-0.4=
5.4+0.5=6.2+3.5=0.61-0.2=3.2-0.4=
2.8-0.8=6.5+4.4=0.79-0.39=3.1+0.3=
6.7-0.7=7.8+3.2=0.77-0.26=8.7-0.1=
8.9-0.3=7.4+1.4=0.7+0.49=3.7+0.3=
9+0.5=8.9-2.9=0.64-0.2=4.6+0.5=
8+0.3=6-1.6=0.86+0.47=7.4+0.2=
二、混合运算。
0.85-0.06+7.18.3-0.18-3.8251.9+24-23.7
63.48-23.78+76.2185.14+17.6+38.58.31+5.92+1.1
30-(1.53-0.44)62.1+(23.4+3.2)9.7+2.98-5.8
一、口算。
5.9-0.2=8.6-2.2=0.88+0.22=5.2-0.7=
2.2+0.7=8.4-0.3=0.79+0.42=2.1-0.5=
6-0.6=7.6+4.5=0.64+0.24=2.5+0.6=
1.6-0.3=6.1-0.5=0.77+0.41=2.2+0.3=
7.6-0.7=7.6+4.6=0.87-0.17=2.7+0.5=
5.6-0.9=6.2+2.5=0.62+0.28=1.5-0.3=
1.5-0.2=7-2.1=0.79-0.05=5.8-0.3=
5.6+0.4=8.8+4.2=0.87-0.47=4.3+0.9=
二、混合运算。
0.67+0.1+3.69-0.13-3.8797.4-21.1+20.2
86.55+48.9+94.7174.87-41.15+46.765.55+3.17-1.86
90-(2.32-0.26)77.9-(21.9+6.2)5.95+1.79+3.74
一、口算。
5.9-0.9=6+0.2=0.62-0.06=7.4+0.7=
7+0.7=9+4.6=0.76-0.05=6.3+0.6=
7.2+0.7=6.3-3=0.87-0.3=7.6-0.8=
6.8+0.5=8.7-0.9=0.73-0.41=5.7+0.8=
2+0.9=7.1-4=0.61+0.42=2.7-0.5=
6.1-0.5=6.5-0.1=0.64+0.46=4.3+0.6=
4+0.7=7.7-4.1=0.65-0.2=4.7-0.1=
7.4-0.2=6.1-3.4=0.88-0.37=5.8-0.9=
二、混合运算。
0.69+0.22+5.89.7-0.35-1.6549.4-11.2+21
74.67+43+21.383.64+44.39+64.78.86+5.14+1.8
70-(3.19-0.11)93+(29.9-7.6)9.65+1.05-5.51
一、口算。
2.5+0.2=8.4-0.7=0.76+0.05=2+0.7=
3.8+0.4=7.4+1.5=0.74-0.27=7.1+0.5=
8.3-0.2=9-0.2=0.65+0.05=8.1+0.4=
1.6-0.8=8-2.4=0.64-0.26=1.5-0.2=
1-0.7=8.9-4.5=0.72+0.32=1.4+0.4=
4.9-0.4=6.5-2.8=0.67-0.2=7.4+0.4=
4.9+0.5=8.3-3.8=0.66-0.25=2.7+0.2=
3.1-0.4=6.5+0.2=0.69+0.18=8.9+0.1=
二、混合运算。
0.8+0.29+6.97.2-0.19-1.8187.8+68.5-14
87.57+28.33+86.5673.36+22.05+36.639.71-6.57+1.08
40-(7.45-0.48)69.6+(10.9-5.9)7.51+3.65+2.66
一、口算。
7.2+0.3=7.8-2.3=0.89+0.26=8.9+0.8=
8.6+0.9=6.5+1.3=0.7-0.17=4.8+0.8=
5.9-0.7=6.9+3.7=0.73+0.17=7.5-0.7=
7.9-0.4=8.7-2.8=0.68+0.1=8.3-0.7=
4.2+0.6=7.7+4.7=0.75+0.14=8.1+0.5=
1.9-0.7=7.6+3.2=0.84+0.09=4.4-0.4=
8.5+0.8=6.9+2.9=0.68+0.44=7.8-0.9=
8.8-0.6=6-1=0.67-0.09=3.6+0.5=
二、混合运算。
0.9-0.12+9.98.3-0.18-4.8235.4+12.7-10.4
66.27-17.36+25.6668.11-28.62+15.077.74+2.19-3.9
90-(4.51+0.32)88.7-(24.9-9.2)5.22+1.36-1.33
一、口算。
7.6+0.4=9+0.8=0.8-0.24=5.7-0.9=
6.3+0.3=9+1=0.81+0.07=7.2+0.9=
3.1+0.6=8.2+1.8=0.73-0.15=8.9-0.3=
2.5-0.7=7.3+0.5=0.7-0.06=5.2+0.8=
2.6+0.5=8.3+3=0.68-0.05=2.3-0.8=
7.8-0.2=6.8-3.7=0.62+0.31=2.4+0.4=
4.3+0.5=7.9-1.7=0.61-0.13=7+0.5=
4.7+0.8=8.5-4.2=0.62-0.47=3.3-0.9=
二、混合运算。
0.63+0.17+4.85.8-0.15-0.8550.3+30.6-19.4
61.01-36.69+67.0774.31-14.31+50.53.5-2-1.14
80-(2.94+0.41)90.4-(22.9+4)5.8+3.11+2.51
一、口算。
4.9+0.8=8+0.7=0.67+0.21=4+0.4=
8.2+0.9=6.7+3.5=0.73+0.41=4.3+0.7=
1.4-0.6=8.4-0.9=0.82+0.37=7.5+0.7=
1.7+0.8=8.3+2.5=0.68+0.23=7.1+0.4=
6.3+0.2=7.7-0.4=0.88-0.03=1.3-0.7=
1.4-0.4=8.4+1.3=0.61+0.23=6.7-0.6=
1-0.8=8.9+0.2=0.6-0.06=7+0.5=
3.2-0.6=9+3.3=0.69+0.25=5.7+0.6=
二、混合运算。
0.82+0.43+0.58-0.43-2.5770.1+42.6-24.9
75.84+39.47+58.6776+32.95+62.179.49-6.88+2.36
80-(1.94+0.54)68.1+(21.2-8)7.1+4.81+2.05
一、口算。
6.4+0.4=7.5+4.7=0.83-0.16=8.8+0.5=
8.7+0.4=8.2+4.1=0.67+0.4=8.7+0.4=
5.4-0.3=7.3+0.1=0.68-0.48=7+0.1=
1.8-0.9=8.8-3.6=0.85+0.2=2.5+0.7=
9-0.1=7.9-0.5=0.8+0.31=3.9-0.9=
5-0.8=8.4-2.4=0.88-0.02=5.6+0.7=
6.8-0.3=7.5-0.3=0.89+0.24=8.6-0.1=
8.9+0.2=6.3+0.7=0.87+0.38=7.2+0.6=
二、混合运算。
0.68-0.01+9.46-0.66-3.3436.3+10+17.8
89.36-24.9+94.1469.21+22.16+41.697.9+3.6+3.95
40-(3.22-0.78)79.6-(15.6-1.9)5.37-1+1.87
一、口算。
4.2-0.8=8+0.8=0.61-0.4=8-0.1=
2.7-0.4=6.4+3.7=0.89+0.05=3.7-0.1=
5.4+0.4=7.1+0.9=0.76+0.43=8.8+0.7=
5.8+0.9=7.3-0.2=0.88-0.44=8.8-0.8=
4.8-0.3=6.8+1=0.81-0.24=8.6-0.2=
4.1-0.9=8.7+3.5=0.9+0.33=1.6-0.5=
6+0.1=7.9+0.5=0.65-0.22=2.7+0.7=
8.1-0.2=8.9+4.6=0.77-0.28=2.2-0.2=
二、混合运算。
0.67-0.07+4.49.4-0.61-3.3999.1-20.2+75.3
62.97-15.18+15.3569.47-23.2+21.617.36+5.5+1.34
60-(4.42+0.66)69.4-(26.8-6.5)9.33-1.53+5.07
一、口算。
5.5+0.6=7.7+0.5=0.63-0.25=4.3+0.9=
3.6-0.6=8.6+0.6=0.78+0.35=2.1+0.4=
1.5+0.2=7.1+3.1=0.87+0.18=5.4+0.3=
6.6+0.1=8-4.5=0.6-0.23=8.7-0.9=
6.6+0.7=7.2+0.5=0.87-0.24=7.1+0.6=
5.7-0.7=6.8+1.8=0.73+0.43=6.8+0.5=
5.1+0.1=6.8+4.4=0.87-0.33=5.2-0.6=
4-0.5=7.2+0.4=0.75+0.36=3.1-0.5=
二、混合运算。
0.78-0.35+9.29.8-0.41-3.5955+25.4-16.4
62.07+12.9+89.8487.5+28.45+57.964.67+2.34+2.09
70-(2.61-0.82)65-(23.2+5.7)8.26+4.98-1.57
一、口算。
7.8+0.8=7+2.6=0.88+0.29=4.5-0.7=
2.3-0.4=7+1.9=0.89-0.35=3.4+0.6=
3.6-0.6=7.8+2.6=0.76-0.18=4.4+0.8=
8.4+0.9=7.3+0.2=0.63-0.26=2.1-0.9=
7.4+0.1=8.9+1.9=0.89-0.05=5.1+0.9=
7.1+0.8=7.4-0.1=0.75-0.47=6.2+0.5=
2.8-0.1=6.3+0.1=0.78+0.2=5-0.8=
7.7-0.4=8.1+3.4=0.65-0.25=5.5+0.7=
二、混合运算。
0.72-0.42+9.35.3-0.35-0.6588.1-13.8-40.3
87.42-32.47+42.5987.55-34.43+97.047.67-3.16+3.81
80-(6.79-0.88)97.4-(13.7+8.1)4.91-2.93-1.42
一、口算。
7.9+0.7=6.8-2.4=0.85-0.08=7.6-0.6=
3.5-0.7=6.2-4.1=0.64+0.25=6.7+0.5=
2.5-0.2=6.7+4.5=0.71+0.01=2.7+0.3=
1.6-0.4=7+2.1=0.76+0.26=8.2-0.7=
8.7-0.8=8.7+4.8=0.9-0.41=8.7+0.9=
1.4-0.6=7+2.3=0.65-0.14=1.9-0.1=
1.4-0.3=9-4.3=0.84-0.21=1.6-0.2=
1.2-0.6=8.9+0.3=0.72+0.23=7.3-0.5=
二、混合运算。
0.73+0.14+3.55.3-0.42-2.5844.3-16.2-20.6
74.69+24.31+90.9984.92-35.83+49.17.27-3.76+1.54
20-(9.71-0.89)86.4+(22-1.4)6.15-2.54-1.95
一、口算。
8.4+0.3=9+1.8=0.77+0.06=1.4-0.3=
5.3-0.5=7.7+4=0.67+0.36=6.1-0.6=
2.4+0.6=6.9+2.3=0.65+0.4=1.8-0.9=
2.1+0.6=6.7+0.3=0.62+0.27=7.8+0.8=
8.7+0.9=6.8-0.6=0.67-0.46=4.2-0.3=
1.7+0.6=6.3+3.1=0.75-0.34=3.9+0.1=
7.1+0.4=6-3.8=0.9-0.02=3.5+0.3=
5.7+0.6=6.3+3=0.77+0.22=7.9-0.8=
二、混合运算。
0.77+0.17+87.3-0.24-3.7665-31.3+21.1
62.57-33.93+50.4262.68-22.17+99.614.83+2.88-1.39
40-(1.06-0.81)88.3-(27-6.7)6.25-3.63-2.49
一、口算。
5.8+0.9=7.5-3=0.73-0.21=3.2+0.5=
2.8+0.9=7.3-0.5=0.67-0.43=5.6+0.4=
4.4+0.8=7.1+2.2=0.86+0.34=4.4-0.8=
7.9-0.4=6.7-1.2=0.86-0.1=5.6-0.1=
5.2+0.1=7.9-0.8=0.85-0.26=5+0.8=
8.6+0.7=7.9+1.2=0.89+0.11=1.1+0.2=
8.1-0.7=9+3.6=0.79+0.03=4.6+0.4=
5.6-0.6=6+3.8=0.9+0.3=6.6+0.2=
二、混合运算。
0.9-0.23+9.75.1-0.2-0.894-34.7-31.9
79.21-45.48+99.0385.93+23.73+63.855.09-1.58-2.76
30-(8.25+0.24)96.9+(23.6-2.3)6.84-2.16-1.5
一、口算。
1.6-0.9=7.8-0.2=0.79+0.13=5.6+0.7=
3+0.2=6.5+3.1=0.85-0.49=4.4-0.4=
7.7+0.4=6.7+4.8=0.79-0.1=6.9-0.7=
8.9+0.1=8.6-1.2=0.66-0.29=2+0.6=
5.6-0.6=7.1-4.1=0.69+0.4=2.8-0.9=
6.4+0.7=8+2.7=0.75+0.45=3+0.4=
4.8+0.2=8.9-0.1=0.8+0.47=5.8-0.1=
1.2-0.6=7+4.2=0.62+0.46=6.5-0.8=
二、混合运算。
0.84+0.36+5.77.1-0.87-1.1393.6-39.8+10.2
76.97-35.52+99.0760.67+37.9+23.38.78-4.68+3.45
90-(6.99+0.35)73.7+(19.4+9.6)6.66-1.53+3.15
一、口算。
8.6-0.9=8.3+1.8=0.87-0.33=6.2+0.2=
5+0.7=7.7+1.9=0.6-0.11=2.6-0.7=
1.8+0.2=6+3.8=0.79-0.19=7.7-0.8=
7.5-0.8=7.4+3=0.64+0.29=4.2-0.3=
6.8+0.8=7.5-2.2=0.62-0.21=2-0.5=
7+0.9=7.5+4=0.76+0.06=2.7-0.1=
2.9+0.3=7.5+1.2=0.66+0.28=5.9-0.3=
7.7-0.7=7-1.7=0.76-0.43=6.2+0.2=
二、混合运算。
0.64-0.45+6.65.6-0.78-0.2280.4-13.6+52.6
89.76-38.23+33.484.85+37.61+21.673.7-1.51-1.46
50-(9.09-0.89)99.8-(21+1.8)7.24-5.61+1.5
一、口算。
7.4-0.3=7+4.4=0.81-0.07=6.4-0.7=
1.9-0.5=7.7-3.8=0.73-0.48=8.9+0.6=
8.1-0.1=6.6+2.3=0.8-0.05=6.3-0.4=
1.9+0.7=7.6+2=0.68-0.44=7.4-0.8=
5.2+0.4=7.6+2.5=0.69+0.2=6.1+0.5=
5.5-0.9=7.8-4.1=0.8+0.34=1.2+0.6=
6.2+0.2=8.5+2.6=0.81-0.01=8.3-0.6=
7.7-0.8=8.2-0.4=0.82-0.28=4.7-0.7=
二、混合运算。
0.82+0.26+6.49.1-0.3-3.794.3-77.7-15.4
72.51-38.3+16.5679.43+26.62+85.675.74-3.95+1.75
50-(3.97+0.12)92.5+(20.5+6.6)6.56+4.61+1
一、口算。
6.2-0.2=7.3+0.8=0.7-0.27=6.5-0.7=
7.9+0.8=6.6+0.7=0.86-0.19=7.5+0.3=
4+0.6=8.7-2.1=0.88-0.36=7.2-0.2=
5.5+0.3=8.4+3.8=0.82+0.