人教版四年级数学下册小数加减法混合运算专项练习题146.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146.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146
一、口算。
8.4-0.9=6.8-3=0.79+0.31=5.5-0.2=
7.7+0.7=8.9-1=0.78+0.02=7.8+0.2=
4.4-0.1=8.2+4=0.66+0.43=1.8-0.5=
7.2-0.3=6.4+2.6=0.83-0.24=1.1-0.7=
3.7+0.4=8.4+4.8=0.73-0.46=7.1-0.6=
5.9+0.2=8.8-1.7=0.77-0.2=2.9+0.6=
1.7+0.9=8.7-2=0.71-0.01=1.7-0.4=
7.7+0.2=7.2+4.6=0.78+0.29=3.7-0.1=
二、混合运算。
0.69-0.17+3.35.3-0.55-1.4587.2+10.4+38.6
77.41-38.26+60.1869.59-18.06+36.215.77-3.5-1.16
60-(8.42-0.27)63.7-(22.4+1.5)9.47-5.81-3.2
一、口算。
5.6+0.4=6.8+0.7=0.69-0.02=6.7-0.6=
6.8-0.4=7.7-0.1=0.82+0.4=4+0.7=
1.2-0.9=6.3+2.4=0.69-0.38=6.8+0.6=
5.7-0.4=7-0.5=0.87+0.17=1.2-0.4=
9+0.8=6.8+1.6=0.8+0.18=3.6+0.9=
4.1+0.7=6.1+3.3=0.68-0.37=3.3+0.7=
1.4-0.3=8.7-4.9=0.68-0.4=3.2-0.7=
6.5+0.8=6.4+4.4=0.9+0.13=8.9-0.3=
二、混合运算。
0.68-0.19+1.35.3-0.31-3.6997.3-76.9+11.7
87.65+18.64+97.5184.85+26.28+14.436.26+3.25-1.52
20-(5.65-0.89)61.3+(21.5-8.1)7.74+3.29-3.7
一、口算。
5.1-0.2=7-2.6=0.67-0.38=4.9+0.5=
4.9+0.9=6+2.3=0.78+0.31=1.4-0.3=
4.4+0.1=8.4-2.6=0.62+0.27=8.3+0.9=
8.5-0.3=6.5-0.4=0.86-0.38=1.7+0.6=
4.2-0.8=7.7-0.9=0.61+0.28=6.6+0.1=
4.6-0.5=6.4-4.5=0.67+0.35=5.9+0.1=
6.7-0.1=6.6-1.8=0.67+0.12=5.9+0.3=
2.7+0.3=6.3-1.1=0.88-0.19=6.8+0.4=
二、混合运算。
0.77-0.15+2.45.9-0.2-3.859.4+15.8+41.1
79.05-18.99+41.0974.8+18.14+42.395.15+2.12+2.34
50-(2.07-0.34)66.3+(12.3+4.3)8.84-5.19-3.15
一、口算。
3.7-0.4=7.4-1.5=0.87-0.4=8.6+0.4=
8.1+0.4=6.7+2.1=0.75+0.13=8+0.4=
6.6-0.5=8.5-4=0.79+0.17=3.3-0.1=
5.1+0.5=6.8-3=0.74+0.03=1.3+0.5=
8.7+0.5=8.8-0.3=0.71-0.26=2.3+0.9=
2.6-0.1=8.7-1.5=0.75-0.27=4.1-0.8=
2.2+0.6=8.6+0.2=0.86-0.08=6.1-0.4=
1.8-0.4=8+1.1=0.85-0.28=8-0.5=
二、混合运算。
0.8+0.3+7.16.2-0.62-2.3881.9-11.7+65.4
70.79+45.7+62.6960.92-32.2+15.385.55-3.49-2.06
80-(3.89+0.64)89-(29.9-1.3)4.12+1.3-1.85
一、口算。
8.3+0.4=8.6-4.8=0.83+0.35=8.1+0.1=
6.5+0.7=6.2-2.2=0.67-0.13=4.4+0.6=
1.2+0.2=6.9+3.6=0.68+0.12=2.8+0.9=
3.8+0.9=6+1.1=0.85+0.03=7.1+0.3=
3.9-0.9=6.7-0.3=0.85+0.48=5.7-0.1=
2.1+0.3=8.1-3.9=0.7-0.44=4.4-0.5=
8.1-0.8=8.6+1.4=0.8+0.07=8.8-0.4=
4+0.8=8.1+0.5=0.64-0.15=3.3-0.8=
二、混合运算。
0.84-0.44+5.86.5-0.26-4.7461.4+44.5+14.2
67.4+32.78+43.8260.24-23.52+56.568.34+4.05-2.04
20-(2.81+0.18)98+(18-3.6)6.49-2.73+1.76
一、口算。
6.2-0.2=7.6+4.4=0.9-0.27=7.5-0.1=
1.4+0.1=7.4+2.3=0.8+0.35=2.9+0.9=
6.9+0.6=6.9-0.4=0.89+0.21=1.3-0.1=
7.7+0.8=7+3.1=0.66-0.49=1.9+0.2=
3.3+0.3=8.3+2.3=0.86-0.32=3.6-0.9=
3.8+0.9=7.8+4.9=0.71+0.38=1.6+0.1=
9+0.1=8.5-3=0.73-0.43=7.4+0.5=
2.5+0.2=8.8-4.8=0.69-0.24=2+0.9=
二、混合运算。
0.88-0.19+7.76.8-0.48-0.5275.2-19.6-12.7
78.75-48.27+93.1984.82+10.75+38.629.62+3.58-5.7
90-(5.64+0.35)64.8+(13.9-6.3)6.96-2+2.42
一、口算。
7.1+0.5=7.3-3.1=0.7-0.09=3.4+0.7=
2.1-0.9=7.4+4.4=0.9+0.1=1.6-0.3=
8.6+0.8=7.6-1.8=0.66+0.19=5+0.5=
4-0.2=6.1+2.8=0.77+0.11=6.8+0.9=
8.9+0.4=8-2.7=0.69-0.27=1.2+0.9=
8.6+0.9=8+3.9=0.64+0.43=2.6-0.5=
6.2+0.8=7.5+0.4=0.79+0.16=5.3+0.1=
7.9-0.2=6.9-3.1=0.83-0.03=1.4-0.7=
二、混合运算。
0.62-0.3+4.15.9-0.2-2.843.5+17.2-17.8
82.76+27.81+13.1482.43-15.14+67.225.19+1.71-2.06
40-(8.57+0.32)97.5+(17.5-8.3)5.51+1.8-3.14
一、口算。
8-0.3=6.9-0.7=0.67-0.39=4.4-0.2=
4+0.6=7.7+4.6=0.63-0.1=3.3-0.4=
5.9+0.2=6.6-2=0.88+0.48=6.1-0.1=
5.3+0.2=7.8-4.9=0.72+0.45=8-0.6=
6.7+0.5=9+4=0.66+0.45=6.8+0.7=
4.7+0.2=6.8-4.4=0.66-0.42=4.6+0.7=
2.7-0.9=8.8-2.7=0.82-0.37=4.5+0.2=
1.7-0.2=6.2+2.3=0.87-0.38=6.7+0.9=
二、混合运算。
0.76-0.16+3.76.2-0.86-0.1455.5+23+31.4
88.3-28.29+11.0861.12+15.64+75.256.3+3.53+1.74
80-(7.11-0.47)73.6-(22.5+6.4)7.09+3.65+2.59
一、口算。
3.7-0.6=6.7+3.4=0.89-0.07=3.3-0.7=
1.3+0.2=7.7-4.4=0.78+0.28=3.6-0.6=
1.6-0.4=8.8+1.8=0.68+0.27=5.9-0.8=
5.5-0.5=6.6+4=0.8-0.15=4.3-0.4=
3.3-0.3=8.9-3.7=0.86+0.03=8.3-0.4=
1.9-0.3=7.8-0.1=0.66-0.08=7.5+0.2=
6.2-0.8=6.1+2.8=0.73+0.18=3.4-0.8=
4.1+0.9=8.4+2.3=0.77+0.21=7.7-0.6=
二、混合运算。
0.61-0.3+1.79.7-0.13-3.8746.6-13.1-27.1
67.77+19.99+99.463.62+33.07+65.863.87-1.34+2.49
40-(2.45+0.89)98.9-(15.9-7.6)7.76+4.15+3.22
一、口算。
4.8+0.5=6.8-4.2=0.61-0.14=6.4+0.9=
6.1-0.3=6.8+0.3=0.65-0.36=3.3-0.3=
2.7-0.5=8.1+1=0.66-0.23=8.8+0.5=
6.3+0.2=7+0.9=0.63+0.15=7.1+0.3=
1.1-0.5=8.3-3.7=0.75+0.43=2.2-0.8=
7.2-0.9=6.9+2.2=0.81+0.17=4.9+0.1=
5-0.8=8.3+3.8=0.72+0.26=1.8+0.3=
4.3-0.3=7.3+3.9=0.75+0.19=5.4+0.5=
二、混合运算。
0.6-0.01+3.88.9-0.18-4.8258.5-16.3+29.2
86.28-17.64+55.0173.8+30.16+67.534.32+1.4-1.12
30-(4.19-0.34)62.7-(10.1-7.9)8.29+2.59+3.81
一、口算。
5.1-0.6=8.1-4=0.77-0.33=7.3+0.2=
2.9-0.5=6-1=0.71-0.03=3.6+0.9=
6.7-0.8=7.9+4.2=0.72-0.47=4.2-0.2=
1.9+0.5=7.9+1.6=0.68-0.47=1.5-0.2=
6.9+0.8=8.8-2.6=0.72-0.02=3.1-0.5=
5.8-0.8=6.3+4.3=0.85+0.36=1.6-0.9=
6.4-0.2=6.4+4.7=0.88-0.02=7.9+0.3=
3.9+0.1=6.6-2.4=0.81+0.06=6.7+0.8=
二、混合运算。
0.74-0.44+3.67.8-0.15-1.8543.8+24.5-10.2
63.41-18.96+25.1484.04-23.24+55.987.6+2.47+3.48
50-(7.87+0.29)78.1+(14.3-1.4)8.9+3.49-5.35
一、口算。
6.5+0.5=6.2+3.9=0.69-0.38=3.2+0.9=
5.8-0.5=7+0.4=0.89-0.08=8.1-0.2=
6.6-0.1=7.7+4.9=0.6-0.42=2.5+0.9=
7-0.2=8.4+2=0.64+0.37=8.7+0.3=
7.5+0.1=7.9-0.9=0.84-0.38=2.9-0.4=
3.1+0.2=8.4-1.6=0.72-0.49=3.3-0.7=
2.4+0.6=6.7+2.3=0.76-0.2=6.5+0.8=
6+0.9=8.2+3.8=0.76-0.37=6.1+0.2=
二、混合运算。
0.61+0.28+5.66-0.41-2.5935.1-13.3-10.9
80.5-21.44+72.4562.51+33.07+68.184.29-2.02+1.12
70-(4.67+0.45)66.3-(20.4+2.2)8.6+3.66+1.23
一、口算。
5.3+0.7=8.2+1=0.85+0.13=5.5+0.8=
5.1+0.5=8.3+1.5=0.7+0.06=5.1+0.4=
1-0.6=8.8-0.5=0.66+0.25=3.2-0.8=
5.5+0.1=8.4+1.4=0.69+0.3=8.7-0.8=
6.1+0.3=7.5-1.5=0.74+0.19=6.9-0.6=
1.6+0.6=6.1+2.4=0.72+0.41=8.5-0.7=
5.3-0.7=6.5-2.9=0.83+0.47=6.2-0.1=
7.1+0.8=8.6+2.5=0.85-0.09=3.8-0.5=
二、混合运算。
0.78+0.39+1.65.6-0.15-3.8536.5+13.1-15.9
84.63-46.69+78.0370.81+37.97+12.454.88+2.67+1.8
60-(8.98+0.81)70.7-(14.4-4.2)6.5+4.21-1.37
一、口算。
3.6-0.2=8.4-4.4=0.74-0.48=7.4+0.9=
5.5-0.8=8.6-4.8=0.8+0.44=5.8-0.2=
4.1+0.4=6.9-0.2=0.71+0.17=5.6-0.6=
7.6+0.5=8.2+0.9=0.77+0.26=6.3+0.3=
3.5-0.5=8.7-0.6=0.69+0.44=2.8-0.3=
6.1-0.2=7.6+4=0.77+0.08=4.6-0.6=
8.8+0.7=6+1.3=0.74-0.11=5.8+0.4=
8.5-0.2=7.5-2.6=0.86+0.15=6.7+0.1=
二、混合运算。
0.79+0.41+7.79.2-0.4-3.637.1+11.8+22.7
84.02-28.52+27.2863.27+10.2+45.019.7+2.68+4.82
60-(6.54+0.62)62.1+(28.4-2.5)6.33-2.11-1.91
一、口算。
5.9+0.7=6.2+2.9=0.86-0.43=1.7-0.8=
9-0.5=6.3-0.6=0.87+0.39=6.3+0.8=
6.4+0.5=8+1.7=0.87+0.41=2.5-0.7=
7+0.8=8.8+2.1=0.71+0.03=7.5+0.7=
6+0.6=7.7+1=0.72-0.18=3.1-0.3=
1+0.4=7.1+3.5=0.7+0.03=6.7-0.9=
1.2+0.6=7+4.8=0.6-0.44=4.3-0.8=
7.3-0.1=8.4+0.5=0.8+0.47=8-0.7=
二、混合运算。
0.87-0.03+8.47.5-0.37-1.6381.5+50.6+12.6
79.8+24.97+20.0283.06+11.34+92.228.06+1.79+3.42
80-(3.43+0.68)86.3+(14.2-4.2)4.63-2.41-1.51
一、口算。
3.8+0.2=8.9-1.1=0.89-0.07=3.8+0.3=
8.9+0.8=8.3+1.9=0.78-0.49=3.3-0.4=
6.9-0.8=8.3-2=0.7-0.3=3.2+0.5=
7.5-0.2=8+2.5=0.9-0.16=8.3-0.3=
5.6+0.1=6.2+0.2=0.81-0.45=1.6-0.5=
7.9-0.1=8.5-3.2=0.75+0.13=4.3-0.5=
4.8-0.2=6.5+3.2=0.68-0.21=6.4-0.8=
6.6-0.4=6.7+1.4=0.71-0.01=3.7-0.6=
二、混合运算。
0.64+0.13+4.56.5-0.73-2.2748.9+31.3+13.1
73.01-20.43+82.6580.28+22.8+79.938.48-3.62+4.66
80-(3.1+0.23)78.1-(16.5-9.3)7.09+2.17+4.05
一、口算。
8.1+0.9=6.7+2.5=0.83-0.09=4.5+0.5=
2.3+0.8=8.6-1=0.82-0.31=7.8-0.9=
5.2+0.8=7-4.6=0.68+0.13=4.8+0.6=
7.6-0.8=7.6+0.1=0.69+0.05=4.2-0.4=
4.6+0.8=7.1+1=0.68-0.15=4.5-0.1=
1+0.1=6.8-4.8=0.83+0.45=2.5-0.4=
2.3+0.9=8.1-0.4=0.6+0.26=5.9+0.7=
6.6-0.9=8.3+2=0.73+0.26=8.6-0.4=
二、混合运算。
0.65-0.09+3.69.6-0.59-3.4139.9+14.4+22.9
77.5+47.59+82.2775.03-31.42+46.814.64+2.43-2.01
80-(4.74+0.15)98.1+(25.8+9.4)7.09-1.81-4.19
一、口算。
2.8+0.7=7.3-1.7=0.77-0.32=2+0.3=
4.4+0.7=8.4-4.2=0.62+0.41=6.6+0.8=
6.6-0.9=6.4+1.9
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