人教版四年级数学下册小数加减法混合运算专项练习题109.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109.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109
一、口算。
2.8-0.7=8.5-1.6=0.73+0.43=8.7+0.7=
1.7-0.1=7.3+3=0.9+0.13=3.4-0.5=
2-0.2=6.6-1.8=0.69-0.25=3.7-0.1=
6.6+0.4=7.5-0.9=0.82+0.18=8.4-0.1=
2.6+0.4=6.6+1.3=0.9-0.26=2.2-0.3=
1.5-0.1=7.5-3.9=0.86+0.25=6.2-0.5=
2.8+0.2=6.3+1.9=0.61-0.19=1.8-0.5=
2-0.3=8.5+0.8=0.83+0.14=4.8+0.3=
二、混合运算。
0.68+0.24+5.49.3-0.46-4.5455.5-26.3+17.7
77.96+48.08+40.167.39+48.88+63.414.57+1.16-2.87
30-(1.44+0.58)76.3+(14.3-8.7)4.09+2.14-1.77
一、口算。
6.7+0.8=7.4-2.7=0.66+0.08=2.1-0.4=
4.2-0.2=8.3+4=0.72+0.39=7.2+0.5=
8.5-0.8=8.4+0.1=0.69-0.04=8.6+0.9=
1.5+0.9=6.7+3.6=0.75+0.09=5.2-0.2=
5.7+0.5=7.8-3.9=0.6+0.46=4.1-0.9=
6.3-0.3=6.8-3.7=0.8+0.09=8+0.2=
5+0.8=6.5-1.4=0.78-0.25=3.2-0.3=
1.2+0.2=7.4+2=0.69+0.15=1.1-0.7=
二、混合运算。
0.84+0.44+5.47-0.81-4.1951.3-25.6-20.9
64.87+44.36+55.5261.6+25.02+74.144.89-1.25-1.02
80-(6.57+0.72)74.6+(26.9+1.9)5.25-3.15-1.95
一、口算。
6.8+0.6=6.6+4.9=0.7-0.08=5.9-0.7=
4.6+0.3=7.5-0.6=0.81+0.03=1+0.2=
4.8+0.7=7.8+4.5=0.87+0.28=7.2-0.6=
5.9-0.3=8+4=0.68+0.44=5.2-0.3=
8+0.6=6+1=0.67-0.37=1.7+0.4=
8.1+0.6=6.9-3=0.78+0.31=5.8+0.8=
8.4+0.5=8.1-1=0.86+0.32=4.9-0.3=
5.8-0.5=7.5-3.2=0.63-0.23=7.9-0.4=
二、混合运算。
0.88-0.45+75.4-0.32-1.6893.9-68.7-21.2
60.42+48.14+20.9383.12-37.52+51.339.07-2.69+5.98
30-(4.37+0.48)96.2+(19.5+6.1)8.31-1.38-5.54
一、口算。
3+0.2=6.2+4.4=0.87+0.35=8.3+0.5=
4.6+0.4=8.8-3.7=0.87-0.05=5.6+0.4=
6.8-0.2=6.1+0.5=0.75+0.19=5.3+0.7=
3.4-0.9=6.9+4=0.66+0.26=6.8+0.2=
4.8-0.7=7.8+0.2=0.64-0.45=6.3-0.4=
3.8+0.8=8.4+4=0.63+0.05=8.8+0.4=
7.4+0.2=7.6-3.1=0.78-0.19=7.3+0.8=
6.6-0.2=8.8+1.4=0.65+0.29=3.7-0.3=
二、混合运算。
0.72-0.43+7.88.3-0.22-2.7887.8+23.1-35.7
89.28+22.67+22.1988.74-37.73+11.83.73+1.53+1.99
40-(5.65-0.53)87.1-(20.2-2.4)4.44+2.12-1.19
一、口算。
1-0.8=8.5+1.8=0.62+0.44=6.6+0.4=
2.8+0.8=8.7-0.8=0.72+0.31=6.7+0.4=
3.7-0.6=7.1-4.2=0.78-0.27=5.1-0.6=
3.6+0.1=8.4+3.6=0.68-0.11=8.3-0.2=
1.8+0.2=6.5-1.1=0.68-0.04=2.6+0.9=
8.9-0.3=7-1.1=0.62-0.42=4.5-0.4=
3.9+0.5=6.5-4.6=0.85-0.41=4.5-0.6=
1.2+0.4=8.9-0.7=0.81-0.33=1.8+0.8=
二、混合运算。
0.64+0.02+48.7-0.64-4.3635+12.5+20.4
71.24-13.32+46.9562.53-22.45+38.96.33+4.17+1.87
30-(6.88+0.73)70.9-(28.8+8.8)4.35+1.13-3.19
一、口算。
2.7-0.6=7.2-3.7=0.85-0.01=1.1-0.8=
3.4+0.2=7.1-1=0.79-0.37=3+0.7=
6.2-0.9=6.6+4.7=0.68-0.29=5.4+0.2=
2.8-0.5=7-4.4=0.77-0.15=8.9-0.5=
8.5-0.3=9+0.5=0.8+0.06=2.4+0.7=
3.5-0.7=8.5+1.6=0.74+0.49=9+0.1=
2.2+0.3=7.1+2.9=0.61-0.41=4.8-0.4=
6.9-0.3=6-2.3=0.6+0.37=5.8+0.7=
二、混合运算。
0.84+0.18+9.96.3-0.47-1.5385.3+48.5-20.3
63.78+13.12+33.8565.36-12.41+39.019.13+1.65+4.88
30-(5.13-0.26)89+(13.8+8.5)6.6-3.39+2.11
一、口算。
1.5-0.4=6.4+4.7=0.69+0.17=2.3+0.2=
7.9-0.3=8.5+3.2=0.65+0.18=8.5+0.7=
2.3-0.1=6.8-3=0.66-0.22=2.5-0.8=
3.9+0.9=8.4-2.2=0.73-0.47=3.7-0.9=
3.8+0.7=7.5+2.4=0.77+0.15=7.6+0.3=
7.1+0.4=6.3-4.2=0.76-0.11=7.3+0.4=
7.1+0.9=9+4.1=0.88-0.47=6.5-0.6=
4.1+0.8=6.7+4.6=0.7+0.44=9-0.6=
二、混合运算。
0.79-0.19+5.56-0.14-0.8643.3-19.9+15.8
74.27+30.28+45.0276.34+33.34+67.147.43+3.81-3.28
20-(8.61-0.58)82-(27.9-9.5)6.8+3.99+2.47
一、口算。
6.2+0.6=8.4-2.4=0.7+0.4=9-0.7=
6+0.6=8.9-3.9=0.76-0.19=8.5+0.3=
3-0.8=7.3-0.7=0.64+0.44=2.6-0.5=
4.2+0.1=7.3-3.4=0.81+0.12=2.7+0.6=
3.6+0.2=6.5-2=0.64-0.49=9-0.2=
5.9-0.1=6.9+3.9=0.69-0.03=2.1+0.7=
7.2-0.4=7+1.2=0.6+0.04=2.8+0.5=
3.9+0.6=6.8+1.8=0.87-0.35=1.1-0.5=
二、混合运算。
0.9+0.07+1.39.3-0.54-1.4685.8-56.2-21.2
68.54+32.51+93.2269.09-39+57.016.4-3.09+3.04
70-(3.67-0.4)86.2+(11.5-9.5)7.74+4.77+1.29
一、口算。
7.2-0.8=7.7+3.6=0.75+0.47=3.4+0.7=
1.9-0.4=8.4+0.9=0.9-0.08=6-0.4=
6-0.4=7.4-3.9=0.81-0.1=1.4-0.4=
3.9-0.2=6+3.2=0.85+0.07=2.9-0.7=
7.1+0.7=7.5+0.1=0.61-0.18=1.6-0.1=
5.6+0.6=6.4-3.4=0.64+0.21=1.3-0.7=
8.3-0.1=8.6-0.3=0.76-0.34=4.2-0.2=
7.7+0.7=7.4-2.6=0.68+0.12=2.7-0.3=
二、混合运算。
0.85+0.31+3.68.2-0.27-3.7348.5-18.5-24.5
84.04-36.4+50.573.66+12.63+56.049.51-6.15+2.51
60-(8.03-0.35)87.4+(21.5+1.7)8.57+6.54-1.38
一、口算。
2.3+0.9=7.4-2.5=0.8-0.24=4.4+0.6=
2+0.1=7.6-2.4=0.74-0.34=7.4-0.4=
7.4+0.9=9+1.5=0.67-0.19=6.4+0.7=
5.3+0.9=7.3+3.3=0.75-0.09=2.2+0.5=
4.3+0.5=6.4+1.3=0.71+0.24=5.3+0.9=
7.2-0.7=7.3-3.7=0.72+0.47=2.8-0.7=
5.4+0.6=8.2-2.4=0.78-0.03=1.4+0.2=
6+0.5=6.7-3=0.61-0.15=4.7-0.9=
二、混合运算。
0.87+0.21+4.97.4-0.84-3.1693.5+69.1+18
71.49+40.69+64.888.88+45.11+81.47.98-6.14-1.34
20-(7.19-0.64)94.1-(16.5+2)8.3+6.25+2.05
一、口算。
2.7+0.8=7.8+0.8=0.66+0.19=5+0.5=
3+0.4=9+2.1=0.69+0.1=4+0.6=
7.6-0.7=6.5-2.9=0.75-0.29=7.9-0.5=
2.1+0.6=6.6+1.6=0.63-0.46=4.2+0.4=
2.5+0.8=6.8-0.6=0.62-0.49=1.2-0.2=
7.5+0.9=7.9-4.5=0.69+0.43=5.6+0.1=
7.6+0.2=8.7-4.5=0.81+0.21=2.7+0.5=
2.2+0.3=7.2-4=0.73+0.08=4.9+0.9=
二、混合运算。
0.74-0.2+5.69.5-0.26-1.7473.8+54.9-18.5
84.96+26.41+19.2889.83-41.81+56.879.66+7.25-1.13
70-(1.71+0.62)69.2-(21.4-8.1)6.86-1.24-4.48
一、口算。
5.4+0.3=7.9-1.6=0.78+0.33=5.1-0.7=
4.1-0.2=8.7-0.5=0.76+0.28=4.8+0.3=
3.2-0.8=8.9-2.9=0.66+0.08=2.1-0.5=
3.2+0.2=8.1+4.9=0.85-0.01=7-0.6=
7+0.7=8.9-4=0.88+0.35=3.4-0.6=
1.5+0.5=6.3+4.6=0.65+0.03=8.2-0.4=
8.6+0.3=8.3+2.5=0.62+0.46=6.3-0.7=
6.9-0.5=7.4+1.8=0.77+0.43=6.8-0.7=
二、混合运算。
0.67-0.3+3.65.3-0.77-4.2365.6-24.5+39.7
87.65+40.47+83.8671.7+48.19+12.178.29+1.51+4.87
60-(6.38+0.96)87.6+(15+3)5.28+1.85+1.53
一、口算。
6.2+0.7=6.1-0.7=0.76+0.37=1-0.1=
8.6-0.7=7.2+4.4=0.72-0.45=8.6-0.6=
3.5+0.3=6.4+0.2=0.89+0.05=1.1-0.9=
1.5+0.3=6.4+4.4=0.84-0.32=8.3+0.5=
5.6-0.5=8.9+4.2=0.62-0.24=5.7+0.8=
8.3+0.6=6.1-0.9=0.75+0.44=4.2+0.1=
6.3-0.6=7.5-0.7=0.85-0.28=7.7-0.3=
4.4-0.3=8.1-1.5=0.78-0.18=6.4+0.3=
二、混合运算。
0.68-0.37+3.99.7-0.24-1.7645.7-24.7-18.3
82+41.37+11.5764.11-32.63+18.795.67+2.28-1.49
20-(6.87-0.58)92.6+(24.2-6.9)8.09-2.02+5.68
一、口算。
3.3+0.2=7.4+4.8=0.69+0.13=8.6-0.1=
5.3+0.8=6.2+1.6=0.67+0.13=3.9-0.3=
8.6+0.5=7.4+3.5=0.68-0.33=3.4+0.6=
6.4+0.9=7+0.7=0.69-0.22=5.6-0.3=
6.7-0.9=6.7+3.1=0.8+0.08=6.1-0.9=
6.2+0.4=7.8+4.6=0.64-0.02=4.8+0.7=
3.7-0.8=8.6+2.1=0.66+0.03=5.7+0.5=
3.5-0.9=6.2+0.6=0.69+0.38=7.4-0.5=
二、混合运算。
0.89+0.09+6.48.9-0.53-2.4771.6-50.1-17.6
89.77-43.65+20.8982.94+47.72+49.036.53+1.99+4.49
70-(5.93-0.31)95.4-(17.8+6)9.98-5.64-1.53
一、口算。
6.4-0.1=9-3=0.62+0.09=3.9-0.1=
6.3+0.6=8.7-0.5=0.79-0.45=6.8+0.9=
6.4+0.2=7.8-1.1=0.7+0.17=8.6+0.4=
7.5+0.6=6.5-4.7=0.73+0.12=1.9+0.2=
2.4-0.3=8.5+4.8=0.81-0.29=5.6+0.8=
3.5+0.5=7.5+1.1=0.79+0.35=4.7+0.5=
9-0.5=7.3+0.8=0.75+0.37=8.5-0.2=
8.7-0.1=9-0.6=0.86-0.1=3.6-0.2=
二、混合运算。
0.6+0.38+7.35.5-0.39-0.6164.6+36.6+14.5
89.14-35.62+92.178.83+32.92+66.923.94+2.11+1.16
70-(8.93+0.59)65.5+(15.2-2.5)9.51-3.93-2.35
一、口算。
3.7+0.1=7.9-2.6=0.74-0.25=6.7+0.9=
7.6+0.1=7.5-4=0.76+0.24=4+0.9=
2.2+0.9=6.1+4.5=0.7+0.38=5.4+0.9=
8.3-0.5=8.9-2.3=0.72-0.42=7.9+0.5=
2+0.4=7.3+4=0.77+0.02=4.2+0.9=
7.6-0.3=8.1-2.7=0.64-0.49=3.2+0.9=
5.2-0.9=6.3-3.7=0.79-0.17=5.6+0.5=
4.6-0.9=8.7-1=0.61+0.25=8.1+0.3=
二、混合运算。
0.66+0.39+1.39.2-0.33-0.6735.6-15.5+19.6
63.44-40+39.4185.7+26.8+83.677.44+3.42-1.63
30-(5.87-0.59)68.8-(13+3.4)6.64+1.17+1.76
一、口算。
5.8+0.8=7.9-2=0.68-0.45=1.5+0.5=
3.1-0.1=8.9+1.3=0.8-0.17=1.2+0.5=
3.3+0.8=7.6-0.4=0.75-0.35=6.9+0.3=
6.9+0.6=7.4+4.5=0.73-0.08=5.8-0.9=
8.3+0.4=7.7-4.5=0.87-0.38=6.3-0.7=
6.7+0.7=7.7-3.4=0.82-0.18=8.2-0.8=
7.2-0.9=6.8+1.8=0.89+0.44=2.1-0.4=
3.2-0.4=6.3+1.5=0.7+0.16=8.7-0.2=
二、混合运算。
0.78-0.48+5.77.5-0.48-0.5255.8+17.3+21.6
73.43+33.12+75.583.44+21.37+71.939.1+4.82-1.01
40-(1.61-0.17)79.6-(14.7-1.2)4.47-1.42-1.25
一、口算。
8.2+0.6=9-1.9=0.61-0.17=6.9-0.9=
1.3+0.4=7.2-1.5=0.85+0.04=1.7-0.9=
3.6-0.2=8.8+3.2=0
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