四年级数学下册小数加减法混合运算专项练习66.docx
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四年级数学下册小数加减法混合运算专项练习66.docx
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四年级数学下册小数加减法混合运算专项练习66
一、口算。
1.6+0.9=6.5+3.3=0.84+0.33=3.8+0.4=
1.6-0.7=8.9+3.6=0.87-0.2=6.1+0.8=
4.4-0.5=8.5-0.5=0.72-0.46=6.5+0.6=
2.1+0.6=7.4-4=0.87+0.02=7.8+0.6=
7.5+0.6=6-1.1=0.78-0.21=4.3-0.5=
5.8-0.6=7.7+1.5=0.88-0.46=7.2-0.7=
5.3+0.5=6.9+0.7=0.68-0.29=3.1-0.5=
6.6+0.9=8.5-4.5=0.84-0.25=1.2-0.3=
二、混合运算。
0.67-0.44+8.76.7-0.87-2.1362.8+46.5-12.8
62.25+15.36+70.0484.05+30.03+63.829.89+4.62+3.44
40-(5.48-0.2)60-(14.9-9.7)4.43+2.89+1.12
一、口算。
2-0.4=7.5-3.2=0.72+0.24=8.8+0.8=
8.1+0.8=6.8-0.1=0.88+0.41=6.3+0.6=
3.6+0.4=6.5+2.5=0.81-0.01=6.9+0.4=
7.3+0.6=6.4+1.5=0.73+0.1=8-0.7=
2.7+0.1=7+1.9=0.8-0.31=1.4+0.6=
2.2-0.1=7.1+4.2=0.66+0.47=5.4+0.2=
4.1+0.8=8.3+1.6=0.63-0.07=1.1-0.6=
5+0.3=6.2+1.3=0.85+0.03=4.7-0.5=
二、混合运算。
0.74+0.1+3.89.4-0.45-3.5595.5-56.2-26.1
60.99-16.93+59.3279.99+32.17+12.786.88-2.45-1.51
80-(2.68+0.22)73-(12.6+1.5)8.15-3.75+1.12
一、口算。
2.3+0.3=6.6-3.3=0.86-0.12=8-0.7=
4.8+0.1=7.7+4.7=0.88-0.45=1.3-0.1=
6.5+0.2=6.4-1.4=0.63+0.44=3.2+0.8=
8+0.5=8.1+2.9=0.77+0.02=1.7+0.1=
5.4+0.8=7.8-0.8=0.81-0.13=4.2+0.4=
4.3+0.2=7.4+2.9=0.77-0.1=8.7-0.8=
1.1+0.1=8-4.7=0.7+0.42=2.8-0.8=
9-0.9=6.5-3.4=0.88+0.11=6.1+0.4=
二、混合运算。
0.77+0.06+4.86.3-0.8-1.275.1+12.7+10
86.94+21.19+54.6788.6+24.57+68.659.99+7.25+2.44
30-(9.27-0.1)92.3+(15.1+7.8)9.6-7.99+1.34
一、口算。
5.5-0.5=6.5-1.9=0.87-0.49=9+0.8=
7+0.7=7-2.2=0.78+0.03=7.3-0.1=
5.7-0.2=6.3+1.3=0.82-0.08=3.1+0.5=
4.5-0.4=6.7-1.3=0.74+0.47=6.7+0.1=
2.9+0.2=8.5-4.4=0.6+0.02=9-0.1=
8.5+0.8=6.2+3.2=0.8+0.45=6.4-0.2=
3.1-0.1=6.9+4.9=0.76-0.06=1.5+0.5=
2.8-0.1=7.1+0.5=0.85+0.2=9+0.5=
二、混合运算。
0.88-0.27+7.77.4-0.87-4.1359.3+16.1+31.9
62.17+29.47+71.0786.17-20.96+36.653.89+1.42-1.14
80-(5.45-0.59)71.9-(12.6-8.8)6.97-1.21+2.48
一、口算。
3.6+0.4=6-0.2=0.87+0.35=7.9+0.2=
1-0.3=9+3=0.83-0.11=4.4+0.4=
6-0.9=8.4-2.8=0.78-0.02=3.7+0.4=
5.7-0.8=7.1+3.4=0.77+0.17=5.9-0.3=
7+0.3=8.1+3.1=0.62+0.27=7.1-0.1=
6.2-0.4=8.9-2.4=0.74+0.46=6+0.3=
5.3-0.7=6.4-1.8=0.78-0.47=3.6-0.7=
3.4+0.4=6-0.4=0.61-0.45=8.6+0.4=
二、混合运算。
0.77-0.05+2.95.5-0.63-3.3771.9+47.6+23.5
76.06+23.18+41.9871.45+41.46+99.25.93+1.74-3.74
80-(7.54+0.89)82.4-(23.3-2)3.64+2.01+1.4
一、口算。
1.3-0.5=7.6-0.3=0.66-0.42=6.2-0.2=
4.6-0.9=7.8-3.6=0.64+0.18=8.4+0.5=
3+0.6=7.5-2.7=0.87-0.11=9-0.9=
3.6-0.8=7.4+2.3=0.87-0.45=2.4+0.7=
7.2+0.6=8-1.1=0.89+0.19=2.7-0.7=
8.3-0.4=6.7+3.2=0.88+0.45=8.3+0.7=
8.1-0.7=8.1-3.2=0.83-0.44=5.6-0.8=
6.6-0.5=7.2+2.3=0.61-0.03=6.4+0.2=
二、混合运算。
0.79+0.2+9.47.4-0.38-2.6285.9+39.1+44.5
67.55+34.54+37.4373.02+31.53+64.299.04+2.7-5.53
80-(1.74-0.13)62.6+(20.4-3.9)9.59-2.12+2.55
一、口算。
2.8-0.4=8.9-4.9=0.88-0.4=3.3-0.2=
8.4-0.1=6.5+1.6=0.62+0.39=5.2+0.8=
4.3+0.3=7.7-2.9=0.74+0.06=2.5+0.3=
7.4-0.8=6.9+4.9=0.71-0.34=5.5+0.8=
5.2-0.9=6.3-3.3=0.84-0.27=1.6-0.5=
6.1-0.4=7.9+4.1=0.63-0.16=1.9-0.3=
7.4+0.2=6+3.1=0.6+0.08=6.7-0.4=
4.9+0.4=6.4-3=0.87+0.16=7.6-0.3=
二、混合运算。
0.82+0.35+5.25.5-0.46-0.5492-53+37.8
67.56+36.51+13.971.09-47.25+79.386.2+2.6+1.34
70-(8.16+0.33)71.7-(23.8-6.2)6.33-3.09+2.23
一、口算。
3.5-0.1=8+2.8=0.68-0.37=6.3-0.7=
3.5+0.7=7.3+1.2=0.65-0.47=7.3+0.1=
7-0.3=7.7+2=0.72+0.34=6.4+0.6=
6.3-0.5=8.1-2.3=0.77+0.05=5.9+0.5=
2.1+0.1=6.8-4.8=0.6+0.07=3.5-0.3=
6.8-0.3=6.4+2=0.8+0.43=6.4-0.7=
4.3-0.5=8.6+2.1=0.7-0.44=7.8-0.8=
3.2-0.9=7.1-4.2=0.82+0.12=8.9+0.6=
二、混合运算。
0.75-0.25+88.1-0.41-3.5954.4-15.7-26.2
68.7-36.42+33.770.54+28.66+58.665.89-1.32-3.73
90-(3.55-0.17)85.6-(22.8-2.9)8.09+6.39-1.05
一、口算。
8-0.3=6.7-3.6=0.78+0.14=8.3-0.3=
7.6-0.9=8.8+3.8=0.78+0.01=5-0.6=
5-0.3=7-4.3=0.74-0.16=1-0.7=
3.7-0.5=6.9-0.9=0.6-0.2=3.4+0.4=
5.1-0.1=7.7+4.5=0.74-0.41=6.1+0.9=
7.8+0.3=7.8-4.4=0.81-0.43=1.2+0.2=
8.2-0.5=7.6-1.7=0.6-0.45=6.8+0.6=
4.4-0.2=6.2-1.2=0.71-0.46=3.4+0.6=
二、混合运算。
0.61+0.47+5.89.3-0.6-3.480.1+20.8-19.4
84.25-35.44+32.6263.21+24.73+57.349.97+5.54-3.57
50-(6.37-0.24)62.2-(22.8+7.9)7.32+2.22+3.79
一、口算。
2.7+0.5=8.8+4=0.66+0.4=8.5+0.9=
6.2+0.8=9-0.1=0.64-0.11=1.4-0.7=
5.3-0.5=8.2-3.1=0.9+0.33=6.9-0.3=
4+0.2=7.4-3.8=0.75-0.02=5.5-0.2=
8.3+0.8=8.7-3.3=0.63+0.06=8+0.6=
4.8-0.6=9-3.2=0.85-0.37=7.8+0.3=
5.8-0.7=6.1-4.7=0.78+0.39=5.8-0.3=
3.1-0.5=8.4+1.5=0.67-0.03=4+0.9=
二、混合运算。
0.74+0.37+9.96.6-0.58-3.4265+16.2-37.8
72.86-42.16+10.5963.3-19.54+41.375.51+4.01+1.42
60-(5.99+0.37)62.7-(13.5-2.8)5.56-1.18+1.84
一、口算。
7.1+0.2=7.1+1.8=0.86-0.46=8.7+0.7=
1.2-0.7=8.4+1.3=0.72-0.36=6.2+0.8=
6.9+0.9=6.9+2.5=0.79-0.11=2.3+0.8=
7.3+0.9=7+1.7=0.61+0.17=3.6+0.3=
8.7+0.8=7.2+4.1=0.88-0.24=6.7-0.5=
5.2+0.1=6.9+3.2=0.6-0.1=2.5+0.8=
6.1-0.3=7.7+0.3=0.72-0.18=4+0.8=
3.2-0.4=7.4-2.5=0.66+0.16=3.7+0.1=
二、混合运算。
0.72+0.07+9.26.3-0.87-1.1384.4+67.9+14.8
77.8+33.67+56.1775.67+33.87+65.787.43+4.23-2.03
90-(6.42-0.69)74.6+(23.8-9.2)4.09-1.73-1.27
一、口算。
1.6-0.9=6.1-3.1=0.81-0.02=9-0.3=
4.2-0.1=6.5+3.2=0.76-0.41=3.4+0.7=
7.5-0.1=8.8-0.1=0.87-0.19=7.3+0.7=
7.9+0.4=6.5+4.9=0.71+0.45=7.7+0.7=
3-0.7=7+2=0.63+0.43=6.3-0.1=
3.1+0.8=7.9-3=0.6+0.3=8.6-0.2=
8.5+0.9=7.3+1.4=0.66-0.24=1.2-0.5=
3+0.6=6.7-0.4=0.74+0.36=6.4+0.6=
二、混合运算。
0.69-0.44+9.27.7-0.29-1.7198.4-37.9-52.1
85.81+42.39+29.1389.63+34.78+56.593.69-1.25+1.68
60-(8.94+0.34)99.4+(29.7+2)6.84-5+1.74
一、口算。
3.1-0.7=6.4+0.6=0.78+0.41=6.8+0.1=
1.6+0.7=8.9+0.1=0.67+0.18=8.4-0.1=
1.8+0.8=6.4-0.6=0.8+0.4=1.2-0.3=
2.7-0.5=7.9+0.8=0.64+0.03=7.9-0.5=
3.4-0.8=7.6-1.5=0.9-0.48=3.7+0.3=
3.5+0.7=6.3-1.9=0.69+0.03=8.1+0.5=
2.1+0.7=6.1-3.4=0.67-0.16=5.2+0.4=
2.8-0.6=7.9+0.4=0.64-0.42=8.2-0.1=
二、混合运算。
0.86-0.15+3.28-0.86-0.1455.2-12.5+40.1
85.59+16.93+30.9578.53+12.87+93.794.93-2.28-2.05
20-(1.31-0.42)63.6-(22.9-1.5)7.13-4.63+1.86
一、口算。
3.5+0.6=6.7-2.6=0.83-0.04=6.2+0.2=
3.6-0.3=7.5-2=0.75+0.05=1.9+0.4=
2.4-0.4=8.4+0.9=0.81+0.47=6.6+0.6=
6.8-0.4=6+0.7=0.67-0.23=4.5-0.7=
1.7+0.1=9+3.4=0.62+0.01=3.6+0.4=
4.7-0.8=7.8+4.9=0.71+0.44=8.4+0.2=
2+0.7=7.6+4.7=0.9-0.2=5.2+0.8=
2.1-0.3=6.1+4.6=0.76+0.07=9+0.4=
二、混合运算。
0.6-0.31+1.89.1-0.88-3.1245.4+15.7+11.3
73.07-28.1+47.277.58-43.39+77.833.98-1.01-1.95
70-(6.93-0.99)60.8+(22+5)5.53-1.11+3.61
一、口算。
1.8-0.8=8.1+3.3=0.68-0.48=2.9+0.4=
3.5-0.2=7.1+4.8=0.87+0.19=6.2+0.5=
3.9+0.5=6.9+1.1=0.63-0.28=2.1+0.9=
8.4-0.3=7.6-1.5=0.63+0.34=1.1+0.5=
3.7-0.1=7+2.3=0.89+0.23=2.2-0.6=
5.6-0.6=8.2+3.5=0.72+0.01=3.5-0.2=
6.4-0.5=7.6-2.5=0.85+0.18=5.8+0.1=
4.2+0.4=6.2-3.4=0.67+0.42=6.7-0.1=
二、混合运算。
0.61-0.16+2.37-0.3-3.787.1+25.2-52.3
78.37+28.4+81.7581.03+11.65+91.624.61-1.37+2.02
20-(5.84-0.41)99.4-(23.1-7.3)6.63+4.04+1.68
一、口算。
5.8+0.3=7.3-2.7=0.71-0.1=3.2+0.8=
7.2+0.5=7.7+0.6=0.75+0.31=7.9-0.1=
7.7-0.5=7.9-3.5=0.88-0.38=5.6+0.2=
4.5+0.4=7.3+1.3=0.75+0.4=7.7-0.5=
1-0.3=7.1+0.7=0.68+0.17=3.9-0.6=
8+0.7=8.3+1.9=0.62-0.37=4.3-0.8=
1.2+0.6=7.5+3.1=0.81-0.48=8-0.7=
5.6+0.5=6.2-0.6=0.62-0.4=6.8-0.3=
二、混合运算。
0.87-0.37+68.5-0.24-4.7688.3+41.1+25
81.06+28.95+46.369.12+20.84+48.266.52+3.11+3
40-(1.79+0.18)71.6+(20.4+6.5)6.6-2.74-2.8
一、口算。
5.7-0.9=7.2+4.3=0.62+0.14=2.4-0.3=
8.4+0.7=7.3+3.7=0.83-0.01=2-0.6=
4.8-0.4=8.6-2.9=0.73-0.2=7.2-0.5=
1.2+0.6=8.7-0.6=0.71+0.46=7.4-0.5=
3.3-0.9=7.5-1.6=0.88-0.13=4+0.1=
3.9+0.2=6.6+3.4=0.87-0.29=6+0.3=
4-0.8=7.4+4.5=0.85+0.48=8.9-0.2=
5.3-0.8=7.2+4.2=0.75-0.1=1.9+0.2=
二、混合运算。
0.77+0.19+29.8-0.2-3.849.4-31.9+12.5
63.27+37.23+49.6571.98+28.32+41.559.28+2.58-5.67
50-(2.86-0.76)64.1-(29+5.5)8.93-5.23+2.99
一、口算。
1.1+0.4=6.5+0.7=0.61+0.24=5.4+0.5=
6.8-0.1=8.6-2.4=0.88-0.4=3.3+0.1=
1.8+0.3=8.8+3.2=0.81+0.02=8.7-0.6=
8.5+0.3=
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