人教版四年级数学下册小数加减法混合运算专项练习题111.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111
一、口算。
1.7+0.5=6.2+1.3=0.9+0.45=5.6+0.2=
7+0.4=7.3+2=0.62+0.4=8.4-0.9=
7.2+0.6=7.4+2.7=0.73-0.13=4.5+0.2=
7.8-0.1=7.6+4.8=0.75+0.27=8.5+0.1=
6.7+0.8=7.1-1.3=0.69+0.26=7.7+0.2=
8-0.1=7.2+4.8=0.9-0.43=5.5+0.8=
2.5+0.1=8.4-4.2=0.62+0.38=8.1-0.5=
6.2-0.6=7.3+3=0.86+0.33=5.3+0.8=
二、混合运算。
0.67+0.44+7.88.8-0.28-3.7298.3+40+24.3
69.14+17.4+73.8489.41-33.38+86.264.87+1.12-2.28
90-(9.74+0.4)92.1+(19.9-1.9)7.92-1.55-5.14
一、口算。
7.8-0.1=7.5-2=0.77-0.13=5.1+0.3=
3.1+0.4=7.3-0.4=0.7-0.47=4.6-0.6=
8.7+0.5=7.4+4.7=0.66+0.27=1.5+0.7=
4.3+0.9=8.3+3.6=0.8-0.4=6.4+0.5=
6.9+0.1=6.2-1.7=0.66+0.25=1.7-0.6=
4.9-0.5=8.9+0.9=0.69-0.17=8.8-0.9=
5.6-0.9=8.5+2.5=0.65+0.49=2.9-0.7=
5.6+0.4=6.1+4.1=0.89+0.19=7.2+0.6=
二、混合运算。
0.74+0.35+5.67.5-0.53-3.4774.5+49.3-12.8
61.05+41.94+20.3371.7+32.42+83.678.86-4.83-2.76
70-(5.96-0.84)91.7+(15+6.6)9.32-5.93-1.89
一、口算。
8.5-0.6=6.2-4.4=0.63+0.39=4.7+0.3=
8.1+0.5=6-1.8=0.78-0.48=6-0.3=
8.1-0.4=6.6+0.3=0.62+0.14=6.6-0.7=
3.3-0.8=6.7-4.1=0.65-0.43=3.3+0.4=
4.1+0.3=8.1+4=0.76+0.26=6.3+0.6=
7.7+0.4=6.5-0.7=0.65+0.47=2.1-0.9=
8.7-0.5=6.1+0.2=0.89-0.26=8.7+0.4=
5.2-0.8=6.7-1.4=0.72+0.36=8.8-0.2=
二、混合运算。
0.85+0.4+7.18.2-0.16-2.8471.5-17.1-33.1
89.97+34.19+45.5967.9+38.59+214.52-2.36+2.09
30-(7.6-0.31)90.7-(15.4-4.8)7.04-4.68-1.78
一、口算。
8.3+0.8=6.5-1.2=0.84-0.46=3.6+0.4=
4.4+0.4=7.3-3.7=0.63-0.17=7.7+0.8=
7.1-0.9=7.7-2.2=0.7+0.01=9-0.7=
6.7-0.1=6+0.9=0.87+0.26=2.6-0.8=
2.6-0.5=8.5-1.8=0.72-0.23=8.1-0.3=
7.3-0.4=8.7+1.4=0.87-0.34=1.7+0.2=
5.6+0.8=8.8+0.9=0.7-0.09=8+0.1=
8.5-0.3=8.1+3.8=0.81-0.32=2.7-0.4=
二、混合运算。
0.65+0.03+59.3-0.65-0.3549.5+13.2+26.4
88.05+25.53+70.289.98+46.53+12.646.73-1.3+1.53
40-(7.75-0.66)69.6+(16.1+1.1)6.65-2.1+2.37
一、口算。
2.6+0.1=8.9-3.4=0.83-0.49=1.6+0.2=
3.9+0.3=8.2-1.7=0.6+0.07=1.6-0.4=
3.6+0.7=6.9-0.5=0.65-0.26=5.1+0.9=
1.1-0.5=8.4-0.7=0.89-0.45=2.1+0.6=
6.8+0.7=6.4+4.2=0.68+0.2=1.7+0.2=
6.3+0.9=8.5+3.6=0.76-0.1=5.8+0.9=
4.1+0.9=8.9-3=0.62+0.48=3.2+0.6=
5.7-0.7=6.3-3.9=0.85-0.16=7.5-0.9=
二、混合运算。
0.9+0.47+2.89.8-0.31-3.6991.4-19.1+46.9
71.02-16.05+60.5466.33+31.12+68.947.34-1.08-3.96
70-(3.02-0.83)98.7-(12-4)5.27+1.05+3.43
一、口算。
7.1-0.4=6.7+4.7=0.62-0.1=5.8+0.8=
3.2+0.1=7.2-3.8=0.87+0.28=5.6-0.3=
7.3+0.4=7.1-0.1=0.68+0.12=5.9-0.2=
3.7-0.2=7.2+0.7=0.65+0.28=2.7-0.2=
5.3-0.4=8.8+4=0.69+0.16=3-0.6=
4.4-0.9=7.8-3.9=0.85+0.27=4.4-0.2=
6.3-0.6=8.4+2.4=0.61+0.17=6.2-0.2=
2.9+0.5=8.1-1.1=0.66-0.42=7-0.3=
二、混合运算。
0.73+0.42+6.65.2-0.27-2.7371.9+39.9-26.9
87.76+22.42+19.6879.89+11.55+49.514.04+2.4+1.2
80-(3.07-0.16)79-(17-3.4)5.42-2.39+2.63
一、口算。
7.8+0.6=8.4+0.4=0.9-0.05=4.4-0.2=
1.5-0.5=7.3-0.1=0.81-0.28=8.9-0.7=
4.9+0.9=7.7+0.5=0.86+0.44=4.5-0.5=
6.7+0.7=8.1+4.1=0.75+0.21=1.8+0.8=
8.1+0.4=6.3+0.2=0.66+0.14=3-0.3=
8.3+0.6=8.8-4.2=0.8+0.41=2.3-0.6=
4.8-0.3=6.3-4.4=0.75-0.08=7.2-0.2=
2.4+0.9=7.5+3=0.77-0.47=5.9-0.3=
二、混合运算。
0.69-0.23+7.35.2-0.73-3.2791+74.3-12
80.26-21.45+55.7367.01+20.41+23.684.4+1.56-1.85
70-(3.36-0.9)87.2-(15.5-6.9)9.15+1.95-2.42
一、口算。
8.3+0.2=6.1-2.5=0.67+0.24=7.8-0.5=
7.8+0.3=7-1.4=0.73-0.21=8.2+0.9=
6.6-0.5=6.3-2.1=0.71+0.17=7.8+0.7=
7.2-0.7=6.2+1.2=0.69+0.02=4.6-0.1=
4.1+0.1=7.7-3=0.81-0.34=2.4-0.6=
6.9-0.8=7.4-3.4=0.63+0.4=5-0.9=
7.4+0.6=8.9+3.5=0.71-0.07=8.6+0.4=
8.6-0.4=6.7+0.6=0.61-0.15=4.6-0.2=
二、混合运算。
0.8+0.11+8.76.1-0.46-3.5462.8-24.1+24.3
63.56-45.64+81.2666.43-36.46+90.914.74-1.79-2.1
30-(8.18-0.46)74.1+(13.8-9.9)4.1-1.06+1.54
一、口算。
6.3-0.3=6.3-1.5=0.61+0.13=4.7+0.3=
6.8-0.2=6.1-4.7=0.83+0.24=1.6+0.2=
8.4+0.6=7.5-0.9=0.79-0.2=5+0.7=
6.1+0.3=6.5-2.4=0.84+0.26=1-0.6=
4.7-0.4=8.8-0.2=0.61-0.25=2.6+0.1=
5.6-0.2=8.9+0.3=0.86+0.3=5+0.3=
1.1+0.4=7.2+2.6=0.66+0.1=1.8-0.4=
8.7+0.4=9+0.9=0.86+0.14=3.2-0.4=
二、混合运算。
0.85-0.4+7.15.8-0.6-1.494+47.8+43.2
70.6-24.32+91.4379.23-37.01+73.586.81-3.37-2.23
80-(5.02-0.35)83.6+(27.7-9.8)8.93+3.98+3.83
一、口算。
7.8+0.3=7.6-0.8=0.67+0.06=4.1-0.7=
2.3-0.8=7.4-1.8=0.88-0.38=7-0.3=
1.9-0.6=6+1.2=0.67-0.08=6.1-0.8=
4.3+0.5=8-3.2=0.76+0.42=7.8+0.6=
4.8-0.7=6.5+4.5=0.84+0.43=4.7-0.7=
3.7-0.4=7.1-4=0.82-0.31=5.2-0.8=
8.1-0.5=9+0.1=0.66-0.37=1+0.2=
5.4-0.3=6.9+1.1=0.87+0.42=1.2+0.9=
二、混合运算。
0.74+0.12+58.3-0.54-3.4651.2-32.4-17.9
76.32-44.33+62.0182.72+24.01+36.276.83-4.96+1.37
40-(2.94+0.98)68.6-(14.4+2.6)8.06-6.5+1.5
一、口算。
5.7-0.1=7.2+2.8=0.72+0.37=6.1+0.3=
4.4+0.4=8.5-2.4=0.74+0.43=6.6+0.1=
5.3-0.3=7.4-4.4=0.66-0.26=8.3+0.9=
8.4-0.9=7.2+2.8=0.82+0.25=3.9-0.4=
6.7-0.9=7.4+0.9=0.72-0.01=6-0.2=
4.8+0.4=8+4.6=0.73+0.49=8.6+0.9=
3.2+0.4=8.6-2.7=0.79-0.33=5.1+0.7=
2.6+0.1=8.7-4.2=0.7-0.35=6.8-0.3=
二、混合运算。
0.8+0.11+77.7-0.31-4.6936.9+19.9-11.9
69.06-36.52+24.8388.65-24.51+74.394.57+2.37-2.04
70-(3.77-0.88)96.2+(15.3+9.8)7.52+5.34-1.84
一、口算。
4.6+0.3=8-2.9=0.73-0.17=7+0.4=
1+0.8=6+2.9=0.7-0.02=6.6-0.5=
5.4-0.4=6.7+2.2=0.74+0.08=4.1-0.4=
8.4+0.5=6.8-2=0.68+0.37=2.1-0.2=
3+0.3=7.6+2.9=0.72-0.2=6.5-0.6=
7-0.6=8.7+1.3=0.89+0.42=1.8-0.4=
5.4+0.1=6+4=0.6+0.41=4-0.1=
6.4-0.7=8.5+3.6=0.88-0.21=4.9-0.4=
二、混合运算。
0.76-0.12+2.97.9-0.49-0.5157.6+21.8+17.1
68.92+28.4+34.8273.78-23.1+12.574.12-2.24+1.17
20-(6.19-0.62)90.6-(12.1-1.5)7.07+5.54-1.49
一、口算。
7.6-0.8=7.2+3.5=0.7-0.1=5.1+0.4=
6.8+0.3=7.7-1.3=0.82-0.47=2.2-0.6=
8.8+0.6=8.7-4=0.75-0.46=4.4+0.4=
9-0.7=8+2.8=0.77+0.01=6.6+0.2=
5.9-0.7=6.6-4.4=0.78-0.09=6.3+0.2=
4.2+0.2=8+2.5=0.65+0.29=1.9+0.7=
3.1+0.2=7.5-4.7=0.79-0.27=9-0.8=
3.9+0.4=8.5+0.8=0.85+0.23=5.7-0.8=
二、混合运算。
0.61+0.11+8.28-0.33-4.6741.1-21.4+15.9
69.55+19.71+49.6769.89+40.77+71.118.47+3.38-1.87
20-(3.82+0.93)64.5+(28+4.6)6.23+2.68+2.89
一、口算。
8.2-0.5=6.9-3.9=0.89+0.03=2+0.4=
4+0.6=9+2.7=0.87-0.32=5.1-0.4=
3.2-0.2=7.1+2.3=0.85-0.1=3.8-0.4=
5.3+0.1=6+3.7=0.75+0.32=8-0.7=
7.9-0.8=6.5-0.3=0.68-0.28=8.2+0.9=
1.2+0.2=7.1+4=0.64+0.34=2.9-0.3=
5.5-0.4=7.4-3.6=0.79+0.3=8.5-0.5=
6.1+0.3=6.3-0.1=0.86+0.16=7.5-0.4=
二、混合运算。
0.62-0.16+9.19.4-0.62-1.3890.2+40.3+18.7
84.84+23.72+59.6981.45-19.89+53.357.1+1.94+4.91
80-(3.06-0.1)94.2+(27.7-8.2)7.75-5.84-1.47
一、口算。
2.8-0.4=7-1.6=0.79-0.47=7.6-0.9=
4.4-0.8=8.9+0.8=0.8+0.27=2.2-0.9=
2.7-0.3=7.1-1.2=0.72+0.34=1.7+0.8=
2.8+0.2=7.3-2.1=0.7+0.08=4.2+0.1=
4.1-0.8=8.3-1.3=0.74+0.35=4.8-0.5=
8.1-0.4=8.6+1.1=0.66-0.23=1.2+0.5=
6.3-0.5=6.8-0.8=0.79+0.12=6.9+0.5=
7+0.9=6.6-3.8=0.73-0.25=4.1+0.5=
二、混合运算。
0.76+0.42+3.58.9-0.68-0.3254+26-20.3
71.33+10.06+91.9872.42-24+75.187.8+1.95+3.32
30-(3.97-0.38)98.6+(20.4+7.3)5.57+2.4+2.87
一、口算。
3.2-0.8=6.6+1.3=0.75+0.04=2.2-0.2=
5.8-0.1=8.5+4.4=0.74-0.06=8.1-0.1=
2.1-0.8=8.1-4.5=0.71+0.15=5.3-0.9=
1.7+0.3=7.8+0.7=0.65-0.49=1.4-0.5=
2.6+0.5=6.6+1.5=0.65+0.41=5-0.4=
1.3-0.6=8.5+0.8=0.9+0.44=6.5-0.9=
7.7-0.9=6.3+4.2=0.71+0.07=1.7+0.5=
3.3-0.2=7.7-1.6=0.79-0.17=5.7-0.5=
二、混合运算。
0.73+0.02+9.85.2-0.29-2.7187+21.7-42.4
65.7+13.27+55.4470.97-14.65+90.424.42+2.65+1.6
20-(8.97-0.76)92-(28.1+2.9)9.51-1.09-1.8
一、口算。
5.8-0.7=8-3.6=0.68-0.48=2+0.1=
3+0.6=7.7-0.1=0.72+0.31=6.4+0.4=
4.5+0.6=7.9+4.8=0.67-0.23=8.5-0.3=
3.3-0.3=6.7+2.9=0.87-0.41=8.6+0.6=
6.9-0.5=6+0.9=0.82-0.25=7.6-0.4=
4.7+0.8=6.2-1.6=0.74-0.17=8.5-0.7=
7.8+0.2=6.6+1.5=0.68+0.32=5.4-0.3=
1.2-0.5=6.4+2.8=0.67+0.49=3.8+0.7=
二、混合运算。
0.81+0.15+1.69.3-0.7-2.359.3-33.4-24.7
85.53+41.34+83.776.94-12.13+19.249.35+7.34+1.16
70-(1.03+0.73)82.8-(12.2+3)4.51+1.24-1.75
一、口算。
2-0.3=8.9+1=0.9+0.46=8.5-0.3=
1.9+0.5=6.9-1=0.65+0.1=8.4-0.8=
6.2-0.3=8.4-3.2=0.9+0.1=1.3-0.4=
1.4-0.6=6