人教版四年级数学下册小数加减法混合运算专项练习题27.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27.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27
一、口算。
6.9+0.8=6.8-1=0.77+0.46=5.9-0.8=
4.5+0.9=6.1-2.9=0.6+0.16=8.2+0.2=
1.4+0.5=7.8+2.3=0.86-0.2=7.2-0.7=
7.4+0.2=6.8+1.8=0.62-0.11=6.2+0.6=
7.8-0.3=7.7-2.4=0.8+0.14=5.2+0.2=
3.8+0.8=8.8-2.2=0.75-0.14=2.2+0.7=
2.7-0.8=6.9-2.5=0.78-0.41=7.8-0.8=
2.5+0.6=7.3+2.6=0.73-0.06=1.2+0.1=
二、混合运算。
0.79+0.13+5.59.9-0.73-0.2741.4+18.3+20.3
64.11-46.99+96.2375.94+43.78+10.746.43+2.39+1.24
30-(2.42+0.96)64.8-(27.8-2.1)8.23+6.13+1.79
一、口算。
5.2-0.5=8.4-3.9=0.71+0.19=8.8-0.2=
2.6-0.1=6.5+3.8=0.89+0.22=2.5+0.4=
9-0.4=7.5-1.6=0.69-0.23=9-0.9=
4.9-0.3=7.2-3.1=0.65-0.05=3-0.9=
8.5-0.7=6.9-0.3=0.68+0.34=5.5+0.9=
1.2-0.3=7.2-4.8=0.6-0.07=7.1-0.8=
1.3+0.2=8.7-2=0.63-0.16=8.5-0.2=
6.1-0.7=6-1.4=0.9-0.13=6.7-0.4=
二、混合运算。
0.67-0.15+8.47.4-0.64-0.3665-30.6+14.4
64.46-18.63+40.7564.52-46.77+38.165.42-3.39+1.76
30-(4.95-0.29)69.3+(15.7-1.1)5.11+3.24+1.01
一、口算。
7.4-0.5=8.6-0.9=0.73+0.28=4.5-0.6=
7.9+0.5=9+3.8=0.64+0.47=4.5+0.2=
6.9+0.4=8.2-0.2=0.8+0.32=1.3-0.2=
2.6+0.5=6.3-3.2=0.9-0.43=7-0.4=
1.6-0.2=7.3-4.5=0.89+0.06=6.5-0.1=
3+0.1=6.5+4.6=0.9+0.3=9-0.3=
6.4-0.6=7.7+4.6=0.73+0.1=3.4+0.8=
5.1+0.2=8.3+4.7=0.89-0.31=2.9-0.5=
二、混合运算。
0.72-0.12+8.45.6-0.14-1.8664.7-22-41.4
80.89+12.47+65.6976.71+11.62+53.46.48-1.76+2.2
40-(3.28+0.27)87.2+(18.8-5.2)9.47+6.3-1.24
一、口算。
8.6-0.2=8.4-4.1=0.69-0.48=5.4+0.9=
6.6-0.9=7.8-3.4=0.61-0.15=8.7-0.4=
3.4-0.4=7.7-4.6=0.67+0.45=1.4+0.5=
8.8-0.9=6.2-4.8=0.67+0.34=2.1+0.2=
7.8-0.9=7.7+3=0.84-0.07=6.8+0.1=
6.7-0.6=7.2-4.9=0.77-0.12=3.7-0.8=
1.7+0.2=6-1.4=0.72-0.4=2.6+0.5=
1.8-0.9=7.2+0.6=0.71-0.39=2.1-0.1=
二、混合运算。
0.78+0.38+2.25.7-0.35-3.6568.7+11.9+40.2
81.53+28.87+28.9165.81-40.53+58.453.83-1.81+1.35
60-(7.01+0.53)89.8-(12.8-9.1)5.47-3.55-1.35
一、口算。
8.1+0.3=8.9+4.9=0.75-0.29=7.1-0.8=
5.1+0.2=6.7+4.7=0.61+0.43=8.9-0.3=
7.6-0.1=7.3+2.9=0.74+0.3=6.2-0.9=
5.3+0.3=7.2-1.3=0.86-0.16=6.6-0.9=
6.5-0.9=8.2+4=0.6-0.48=5.3+0.5=
6+0.2=6.8+0.9=0.79+0.48=7.5+0.9=
8.2-0.6=7.9+4.8=0.87-0.18=7.2-0.9=
6.9-0.9=6.9+4.3=0.67-0.38=6.6+0.2=
二、混合运算。
0.64+0.02+8.46.5-0.83-3.1765.8+33.9-31.5
71.97-47.88+83.9777.01+20.28+23.553.97-1.34-2.58
50-(3.6-0.75)72+(18-8.5)7.59-1.48+5.43
一、口算。
3.2+0.4=6.2-0.8=0.77+0.06=4.1-0.6=
8.7+0.3=8.8+4=0.84+0.45=3.3-0.9=
5.6+0.7=8.4+4.4=0.87-0.11=5.9+0.9=
4.5-0.6=6-2.5=0.66+0.39=2-0.6=
4.6+0.2=8.9+0.1=0.7-0.13=4.8-0.6=
3.4+0.8=8.9-1=0.84+0.44=5.2-0.2=
6.4-0.6=6.7-2.8=0.63-0.26=7.4-0.6=
3.5+0.7=8.3+1.7=0.82-0.11=1.5+0.4=
二、混合运算。
0.81-0.31+1.96.6-0.18-3.8246.8+19.1+17.8
61.95-34.66+42.3965.8+29.18+29.628-5.4+1.93
50-(7.14-0.75)97.8-(23.1+4.8)7.57-2.3+3.17
一、口算。
3.5+0.4=8.7+3.7=0.68-0.23=1.7+0.1=
1.9-0.2=6.2-2.1=0.6-0.38=7.4+0.8=
5.2-0.4=8.3-4.6=0.8+0.41=5.6+0.2=
5.4+0.1=8.9+0.5=0.6-0.2=1.1-0.6=
6.4-0.4=7.3-2=0.71-0.29=2.7+0.7=
8.3+0.2=6.2-2.9=0.64+0.2=2.6+0.4=
8.6-0.7=8-3.5=0.67-0.02=3.7+0.1=
7.6+0.9=8.8+0.5=0.62-0.26=2-0.4=
二、混合运算。
0.9-0.46+5.35.7-0.55-4.4535.4-17.7+10.1
84.48-15.56+20.9164.89+42.92+26.318.4+1.29+6.91
90-(3.42-0.19)78-(17.2+2.1)5.4-2.86+1.3
一、口算。
7.1+0.6=6.3-0.1=0.71+0.12=3.2+0.6=
7.7-0.8=8.1-3.6=0.6-0.17=1.5-0.7=
3+0.2=6.3-2.5=0.85-0.24=7.5+0.2=
4.7-0.2=8-1.3=0.6-0.26=8.7-0.5=
8.5+0.3=7.6+1.8=0.86+0.02=2.8+0.2=
2.7-0.3=6.8-4.6=0.65+0.04=7.8-0.5=
7.9+0.8=9-0.8=0.77+0.27=1-0.5=
7.9+0.7=8.9+3.6=0.9-0.37=7.9+0.6=
二、混合运算。
0.68-0.13+5.38.1-0.32-2.6876.3+46.5+29.6
89.81+12.91+93.3166.22+28.87+57.544.74+2.63+1.35
80-(3.71-0.54)62.8+(19.3-6.3)9.67+5.6+1.36
一、口算。
5.1+0.9=8.5+4.9=0.85-0.37=4.6+0.8=
4.3-0.4=6.3-0.2=0.64-0.24=7.2-0.7=
5.8-0.4=8.9+0.5=0.67+0.36=5.1-0.4=
6+0.6=7.5+3.8=0.76-0.28=4.3-0.3=
3.8-0.1=6.6+4.7=0.64-0.1=3.1-0.6=
2.7+0.9=8.7+1.2=0.73+0.26=5.6+0.4=
8.3+0.2=6.1+2.8=0.72+0.38=7.2+0.7=
3.9-0.7=9-4.9=0.67+0.31=8+0.4=
二、混合运算。
0.63-0.05+9.48.8-0.16-0.8488.1+63.2-15
83.92+48.41+33.0472.33-34.57+76.025.32+3.52-1.59
70-(2.97-0.99)76.2-(10.4+2.3)5.15-3.51-1.35
一、口算。
3+0.4=6.8-1.3=0.82+0.03=6.1+0.6=
8.2+0.8=6.5-4=0.64-0.47=3.9-0.3=
3.5-0.6=8.8+4.5=0.89+0.06=6.9-0.8=
7.3-0.5=7.8+4.1=0.65-0.47=6.6-0.6=
5.1+0.4=8.2-4.8=0.68+0.3=2.1-0.8=
1.9-0.9=8.9-3.5=0.61-0.13=2.1+0.4=
1.4-0.6=7.8-4.3=0.88+0.45=6.4-0.7=
7.1-0.6=8.2-4.6=0.85+0.43=2-0.9=
二、混合运算。
0.73-0.1+0.15.4-0.38-3.6249.5+18.6+23.4
77.1-15.28+57.1689.76-21.42+22.587.78+6.15-1.41
40-(8.86+0.99)75.5+(15.7-5.3)3.97-2.29-1.67
一、口算。
2.9+0.5=6.6-4.9=0.64+0.13=1.6-0.2=
1.5-0.1=6.9-1.8=0.72-0.11=6.1-0.9=
9-0.5=8+0.4=0.87-0.24=3.3-0.1=
8.4-0.5=8.7-0.7=0.72+0.38=2.1+0.2=
9+0.6=7.2+3.3=0.84-0.47=1.5+0.3=
2.4+0.8=6-0.5=0.86+0.24=3.3-0.5=
3.9+0.4=6.3+3.1=0.74-0.32=2.2-0.8=
4.3-0.1=6.4-1.4=0.64-0.17=5.4-0.5=
二、混合运算。
0.87-0.25+4.18.4-0.71-1.2979.4+26.7+40.2
65.91-43.41+76.5660.05+20.97+64.813.72-2.21-1.02
90-(3.93+0.98)90.1-(12-7.4)9.7+2.99+6.07
一、口算。
5.5+0.9=8.4+3.3=0.89-0.17=4.6-0.3=
6.7-0.6=8.1-0.8=0.71+0.47=2.8-0.3=
8.2+0.8=7.9-3.5=0.89-0.47=6.9-0.8=
7.6+0.6=6+0.9=0.81+0.41=7.9-0.8=
8.6-0.6=6.4-4.7=0.74+0.07=8.7-0.2=
8.8+0.6=8.8+1.1=0.86+0.03=7.7-0.5=
7.3+0.9=9+0.8=0.88-0.12=5.5+0.1=
4+0.9=8.6-4.3=0.7+0.05=4.5-0.8=
二、混合运算。
0.63-0.04+6.78.1-0.16-2.8461.2+43.9-16.1
68.57-13.61+94.9262.63+31.66+65.234.02-1.25-1.67
50-(2.35-0.12)77+(22.8+1.7)8.2-3.48+3.01
一、口算。
7.5+0.1=7.3+2.8=0.83+0.38=5.3+0.5=
5.3-0.3=8.3-2.8=0.89+0.27=5-0.8=
8.6-0.7=9-3.4=0.68-0.06=3.6-0.7=
8.9+0.2=9-1.1=0.63-0.26=3.7-0.9=
2.8-0.5=6.5+4.3=0.84-0.44=5.2+0.7=
2.8+0.5=6.6-1.1=0.86+0.46=1+0.6=
2.2+0.9=9+2.2=0.75+0.38=1.7-0.7=
4.3-0.9=6.5+3.2=0.82-0.42=2.8-0.1=
二、混合运算。
0.76-0.18+6.16.8-0.19-4.8162.5-36.8+12
83.4+15.89+15.7474.56-14.58+50.777+4.63-1.12
20-(4.51+0.96)81.7-(28.6-6.9)6.81-4.74+1.61
一、口算。
3.9+0.8=8.2-2=0.62+0.24=6.7-0.1=
5.8+0.8=6-1.7=0.84+0.16=4.3-0.7=
4.5+0.3=6.8-1.5=0.75-0.45=6.4-0.2=
3.7-0.3=7.8+2.6=0.71+0.07=4.8-0.4=
5.8-0.4=9-1.4=0.7-0.09=5.2-0.6=
1+0.8=8+2.5=0.89+0.03=1.2+0.7=
1.6+0.1=8.9-3.1=0.89-0.28=2.5+0.4=
4.6+0.2=8-1.4=0.76-0.22=2.5+0.9=
二、混合运算。
0.83-0.22+0.69-0.4-0.663.2+18.8-22.6
87.03+47.25+97.4871.2-21.75+13.785.31-3.6-1.58
60-(9.22+0.77)71.6+(26.5+3.5)7.43-4.84+1.03
一、口算。
4.5+0.9=6.3+3.2=0.78-0.07=5.1+0.9=
8.6-0.7=6.8-2.9=0.89-0.46=4.2+0.9=
2.1-0.8=8.3-2.4=0.68+0.37=4.6-0.9=
6.5-0.6=8.1-2.5=0.71+0.32=2.7+0.2=
8+0.2=6.4+4.1=0.81+0.26=6.4-0.2=
6.3+0.8=8.3+0.5=0.87+0.09=2.5+0.1=
7.5+0.1=8.1-2.7=0.79+0.22=4.9+0.6=
1.3-0.6=7.9+1.7=0.7+0.49=5.5+0.9=
二、混合运算。
0.72-0.05+1.99.6-0.77-4.2362.2+30.4-19.6
87.69-31.31+41.6362.08-27.07+56.926.41+3.48-2.74
60-(8.9+0.25)91.2+(15.4-6.6)3.5+1.54-1.12
一、口算。
5.1+0.8=6.3+2.1=0.62-0.09=1.8-0.8=
2.3-0.7=6.5-0.3=0.7+0.31=8.6+0.7=
5.8-0.1=6.6-0.7=0.9-0.29=2.3-0.7=
1.6-0.6=7.8-2.6=0.66+0.47=8.9-0.7=
1.3+0.4=7.9+3.7=0.64+0.22=8.1-0.8=
7.6-0.9=6.6-3.8=0.83+0.17=3.9+0.6=
4.5-0.7=7.5-0.3=0.64+0.38=1.6-0.7=
5-0.1=8.5+1.7=0.85+0.27=2.3+0.7=
二、混合运算。
0.65-0.3+6.57.8-0.48-3.5271.6-45.1+23.9
64.29+29.5+10.7787.13-42.65+52.195.37+3.11-2.13
40-(9.08-0.3)90.7-(10.8+2.5)5.29-1.72-2.73
一、口算。
4.2-0.5=7.2-3.1=0.72-0.21=7.8-0.8=
6.1-0.5=7.1+2.1=0.71-0.04=7.2-0.8=
4.2-0.6=9-0.6=0.79-0.37=5.4-0.2=
2-0.1=6-3.4=0.69-0.45=1-0.9=
7.1+0.7=6.8-4.8=0.88+0.31=3.5+0.8=
8.1-0.6=7.9-1.5=0.84+0.38=4.1+0.6=
8.8+0.8=6.8-2.9=0.89-0.36=3.6-0.6=
7.7+0.5=7-3.6=0.88-0.33=8.1+0.1=
二、混合运算。
0.75-0.03+0.58.7-0.27-1.7341.2+11.9+26.5
85.7+12.78+96.2889.98-16.89+24.269.25-1.13+6.59
80-(9.38+0.91)87.5+(25.3+1.4)5.52-2.74-2.41
一、口算。
2-0.5=6.8-4.1=0.67-0.44=1.2+0.5=
8.5-0.7=7.5+1.5=0.83+0.32=3.1+0.6=
2.8+0.5=6.8-
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