人教版四年级数学下册小数加减法混合运算专项练习题77.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77.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77
一、口算。
6.4+0.1=6.4-2.6=0.7+0.29=5.8-0.8=
4.5+0.9=8+2.2=0.72-0.36=4.8-0.3=
7-0.7=6.1-4=0.64+0.2=8.9+0.8=
8.2+0.9=7.9-2.3=0.76+0.11=2.5-0.6=
1.4-0.1=6.8-3=0.61-0.27=7.3-0.5=
4.1-0.8=6.9+3.1=0.74-0.41=7.5-0.1=
7.2-0.8=7.1+0.6=0.83-0.23=2.9-0.5=
7.9+0.8=6-4.1=0.69-0.45=1.2+0.3=
二、混合运算。
0.76+0.18+5.85.9-0.38-4.6239.3-15.9+13.5
66.99+25.62+18.4673.86+44.73+81.965.84+3.75+1.58
60-(4.73-0.79)65.4-(20.9-6.5)9.72+1.83-5.04
一、口算。
8.1+0.9=7.3-3.3=0.66+0.22=6.6+0.6=
2.7-0.4=7.8+1.7=0.73-0.38=8.8-0.2=
2.3+0.2=6.3+0.1=0.71+0.2=1.9+0.6=
4.6+0.4=9-3=0.75-0.32=1.2+0.5=
4+0.4=7.7-0.9=0.78-0.46=1.5+0.3=
8.8-0.4=7.4-1.3=0.78+0.28=9-0.4=
6-0.8=8.3+1.3=0.9+0.38=4.3-0.5=
6.2-0.6=9-0.3=0.62-0.14=4.1-0.9=
二、混合运算。
0.78+0.09+1.48.5-0.52-1.4881.9+17.1+11.3
82.8-30.07+37.1667.79+27.72+13.913.93-1.66-1.28
90-(7.11-0.95)97+(10.6-3)4.3-1.81+2.26
一、口算。
6-0.4=8.6+0.3=0.7+0.33=2.4-0.5=
8.9-0.5=8.2-0.2=0.67+0.32=9+0.7=
4.7-0.3=6.4-2.3=0.71+0.14=6+0.2=
2.4+0.4=8.8-0.4=0.89-0.1=1.9-0.5=
2+0.8=7.6+2.5=0.79-0.03=9-0.3=
7-0.5=7.7+0.9=0.79+0.24=4.8-0.7=
1.4-0.1=6.6-4.2=0.66-0.46=4.3+0.4=
8.2+0.5=8.1+1.6=0.78+0.19=7.7-0.2=
二、混合运算。
0.79-0.42+5.65.4-0.52-1.4884.7-51.8+29.4
73.37+13.6+49.5775.19-15.57+13.486.07-3.17+1.79
20-(3.8+0.24)93.7-(13.2-5.4)7.37+4.21-2.86
一、口算。
8.8-0.6=8.7+3.2=0.86+0.11=3.1-0.3=
5.8-0.7=7.6+0.2=0.61-0.42=6.3+0.1=
5.5+0.5=6.6+2.4=0.78+0.06=1+0.7=
5.1-0.1=6.9-0.4=0.79-0.09=3.8-0.6=
2.3-0.3=6.7-4.6=0.78-0.49=6.8-0.4=
5.2-0.8=8.1-2.6=0.67-0.04=2.1-0.4=
2.2+0.5=7.2+2.6=0.67+0.08=9-0.4=
1.5-0.4=8.3+2.2=0.85-0.3=6.7-0.7=
二、混合运算。
0.79+0.37+38.2-0.5-4.577.1-31.5-43.5
87.87-10.15+10.6782.61+15.39+59.836.33+3.03+1.12
90-(1.16+0.48)68.5+(14.6-9.4)5.65-1.94-1.89
一、口算。
1.2+0.1=6.9-0.4=0.6+0.06=5.4-0.9=
8.4+0.2=7.8-0.8=0.77+0.23=2.5+0.5=
6.1-0.5=7.8+1.1=0.67-0.34=7.7+0.6=
5.4+0.3=8.8+2.3=0.7+0.01=5.7+0.1=
2.6-0.1=8.7+2.3=0.75+0.31=3.7-0.1=
7.7-0.2=7.2-0.2=0.79+0.11=7.7+0.7=
6.7+0.7=8.7+2.4=0.64+0.14=4.9-0.7=
8.4+0.7=8.4+2.9=0.63-0.21=4.2-0.3=
二、混合运算。
0.65-0.1+0.49.4-0.49-1.5189.8-50+36.1
82.77-26.65+38.3580.97-18.04+93.349.81-3.51+4.97
80-(3.6-0.28)85.3-(21.8+3.1)9.11+6.98+1.76
一、口算。
7.2-0.7=8.3+2=0.82+0.14=8.8+0.3=
8-0.9=8.8-2.9=0.86+0.47=4.8+0.3=
3.1+0.5=7.8-3.8=0.66+0.11=6.7-0.3=
6.1-0.8=7.6-0.9=0.73+0.42=6.5-0.5=
3.3+0.1=8.9+0.4=0.81+0.06=2.7-0.4=
6.4-0.8=7+1.1=0.88+0.27=8.9+0.6=
2.5+0.3=6.9+1.2=0.84+0.45=1.3-0.9=
8-0.1=8.2-0.8=0.77+0.29=6.6+0.5=
二、混合运算。
0.61-0.32+6.35.9-0.47-0.5342.5-16.8-18.4
72.98+20.36+90.0263.46-41.84+45.197.12-3.88-2.91
30-(8.03+0.25)74.1+(14.5+9.1)7.68+3.14+4.34
一、口算。
6.8+0.9=6+4.5=0.75+0.24=1.8+0.8=
8.1+0.1=8.7-1.8=0.89-0.49=5.4-0.7=
5.9+0.1=8.4-2.1=0.72-0.12=3-0.3=
6.6-0.5=8.4-3.9=0.83-0.27=4.2-0.8=
3.7-0.5=7.3+0.1=0.86+0.1=8.7+0.7=
5.9-0.5=7.4-0.8=0.87-0.13=6.6+0.9=
2.6-0.8=8.3-1.4=0.74-0.04=8.9-0.5=
6.2+0.2=6.8+2.9=0.76-0.3=4.4+0.5=
二、混合运算。
0.64+0.41+1.27.8-0.8-2.247.9+23.8-11.4
66.32+38.57+23.1562.42+14.18+26.67.01+4.36-1.2
70-(6.2-0.3)85.8+(29.7+4.4)5.25+1.67-2.62
一、口算。
3.2-0.4=6.5-4.6=0.76-0.15=1.5+0.9=
6+0.5=7.8-4.7=0.9+0.04=5.4-0.1=
2.8-0.3=8.1+0.6=0.71-0.3=6.7+0.3=
5.3-0.9=6.3-3.3=0.72-0.39=7-0.7=
8.2-0.9=6.8+4.2=0.82+0.37=2.2-0.6=
7.1+0.6=8.1-4.2=0.9-0.21=3.4-0.3=
3.9-0.8=8+1.1=0.69+0.22=6.1-0.8=
2.8+0.9=7.5-4.9=0.86-0.15=1.6+0.8=
二、混合运算。
0.76-0.21+1.49.1-0.86-4.1436.4-13.1+21.4
80.72+13.94+26.3162.55+11.93+91.997.4-4.51-1.22
30-(5.93-0.25)70.2+(17-7.9)9.78-5.31-1.5
一、口算。
7.5-0.9=8+1.8=0.79-0.43=4.9-0.8=
6.6-0.4=6.4-0.8=0.79-0.31=5.6+0.5=
1.9+0.7=6.6+1.3=0.9-0.35=8.5+0.8=
2.2-0.2=7.4-3.3=0.66-0.03=6.8-0.8=
4.6+0.7=6.6+3=0.78-0.03=4.5+0.4=
5.8-0.3=6.4-1.6=0.86-0.46=1.6-0.4=
8.2+0.2=9-1.8=0.62+0.48=2.3-0.7=
6.6-0.8=7.2-0.3=0.85-0.2=6.7-0.2=
二、混合运算。
0.89+0.03+1.26.8-0.47-3.5385.7-70.2+13.4
76.47-22.78+15.778.52+47.54+37.469.9-1.09+7.17
50-(1.16-0.69)60.8+(21.6-9.8)3.75+1.57+1.45
一、口算。
2.4-0.2=8.2+3.6=0.61-0.19=7.5+0.6=
1.6+0.8=8.7-2.4=0.71-0.33=5.5+0.7=
6.1+0.8=7.9-2=0.77-0.4=5.6+0.2=
6.2-0.1=6.4-3=0.89-0.36=8.9+0.5=
7.9+0.7=8.4+0.3=0.74+0.12=5-0.9=
3.4+0.1=8.6+1.8=0.78-0.13=5.4-0.1=
8.6+0.5=8.7-2.2=0.81+0.39=8.6-0.9=
1+0.3=7.7+1.9=0.88-0.44=4.7-0.3=
二、混合运算。
0.74+0.26+4.85.2-0.23-1.7758+19.9-31
82.9-48.85+88.9669.62-14.33+22.479.49+1.48-6.7
30-(7.27-0.48)64.7-(29.9+9.2)7.56-3.09+3.31
一、口算。
9-0.1=8.5-1=0.67+0.46=3.4+0.5=
1.1-0.5=6.3+2.6=0.61-0.29=4.7-0.5=
8.8-0.8=6.2+4.5=0.61-0.28=8.5+0.9=
5.1-0.4=8.4+3.9=0.65-0.25=5.2-0.5=
4.5-0.3=6.2+2.4=0.73-0.3=5.6-0.8=
4.9+0.1=6.6+0.4=0.7-0.44=3.2-0.7=
2.3+0.2=7.7-4.1=0.78-0.49=9+0.7=
7.9-0.6=8.7-4.1=0.9-0.43=1.9+0.8=
二、混合运算。
0.74-0.02+8.68.1-0.5-1.535.9-10.3+13
75.4-18.34+12.0971.01+31.13+57.718.96-6.24-2.05
30-(1.97+0.54)90.4-(10.8-7.5)3.53-1.24+2.08
一、口算。
5.6+0.6=6.8+4.5=0.61+0.02=6.2+0.9=
8.7-0.8=8+3.7=0.65-0.45=3.8-0.3=
4.8-0.7=6.4+4.2=0.86-0.15=4.4-0.7=
8.6-0.3=7.5-1.9=0.67-0.49=2.2+0.5=
4.8-0.2=6.7-0.4=0.8-0.04=1.5+0.4=
1.9-0.9=6.9-0.6=0.73-0.32=6-0.1=
7.6-0.9=7.1-3.9=0.75-0.49=4.8+0.1=
8-0.1=8.6+1.5=0.65+0.46=6.9+0.5=
二、混合运算。
0.73+0.13+3.79.4-0.83-4.1784.7-40.4+40.6
89.21+42.48+26.9172.63-45.14+33.159.67-7.1-2.13
70-(4.25-0.95)80.5+(10.9-8.1)9.61-3.35+3.67
一、口算。
6.5+0.9=7.4-4=0.88+0.16=8.2-0.9=
1.5-0.1=7.7+1.4=0.7-0.38=6.6+0.2=
3-0.1=6.5-4.8=0.7+0.35=7.1+0.7=
6.4-0.3=7.7+2.9=0.86+0.01=7.9-0.7=
1.8-0.2=8.9+2.1=0.89+0.08=4.7-0.2=
2.9+0.5=6.1-4.3=0.61-0.11=6.1-0.7=
7.8-0.4=7.6+0.7=0.61-0.2=6.7+0.5=
8.7-0.9=8.9-0.8=0.65-0.11=2.6+0.5=
二、混合运算。
0.71+0.3+5.95.2-0.45-3.5567.6+28.3+25.7
73.58+35.55+95.2279.53+33.38+18.766.41-2.29+3.37
40-(3.73+0.48)90.6+(18.1+1.5)8.2+3.98+1.26
一、口算。
8+0.8=8.6+1.1=0.89+0.38=6.6+0.8=
8.1+0.2=8.1-1.6=0.79+0.1=5.3-0.8=
2.6-0.3=7.7+4.5=0.73+0.45=3.1-0.3=
4.2+0.3=7.8+0.9=0.73+0.49=2.7-0.7=
5.5-0.9=8.1-2.4=0.76+0.38=6.9-0.5=
1.3-0.3=6.6+4.3=0.66-0.04=4.9+0.7=
3.4-0.7=6.6-4.9=0.87-0.35=4.1-0.1=
5.9+0.1=8.4-4.3=0.67+0.09=2.6+0.7=
二、混合运算。
0.85-0.03+0.26.1-0.33-2.6739.4-23.9-11.5
66.7-27.98+83.8373.1+34.23+44.56.69+3.76-1.3
30-(7.7+0.6)87.9+(17.6-5.4)4.34-2.4+1.56
一、口算。
7.8+0.2=7.9+4.1=0.84+0.3=6.3-0.6=
1.4+0.4=6.6+4.3=0.68+0.14=2.7-0.1=
2.8-0.4=8.8-1.9=0.65-0.26=1-0.3=
4.5+0.4=8.1+1.1=0.76+0.22=9+0.8=
3.7-0.5=7.2-1.5=0.73+0.16=6.6+0.9=
6.1-0.8=6.2+1.4=0.63+0.06=8.1-0.1=
5.9-0.1=8.3-2.1=0.82-0.26=7.3-0.9=
8.1+0.1=7.3+3.1=0.7-0.38=3.6-0.3=
二、混合运算。
0.78-0.13+9.67.8-0.58-4.4254.8+33.6-11
62.38+41.3+63.1279.69+27.23+39.773.9-1.26-1.62
80-(8.69+0.26)83.5-(14.3-3.7)3.57+1.74+1.34
一、口算。
6.4-0.6=9-4.9=0.61-0.26=2.5+0.3=
4.4-0.4=7.1+2.6=0.75+0.32=3.6+0.4=
6.6-0.8=7.4+3.8=0.67+0.04=1.6-0.3=
4.5-0.1=8.3-0.1=0.85+0.09=3.1-0.3=
2.2-0.6=7.9-3.8=0.74-0.43=4.8+0.1=
4.5-0.1=6.5+3.4=0.74-0.04=6.1-0.6=
7.3-0.5=7.3-0.5=0.76+0.32=5.2-0.3=
5+0.7=6.2+0.5=0.65-0.15=1.3-0.8=
二、混合运算。
0.77-0.32+6.68.2-0.88-1.1298.8+53.5-41.2
73.3+39.65+59.1474.27-47.2+91.649.12-3.23+3.36
90-(2.81-0.72)71.3+(17.8-7.5)8.94+5.63+1.88
一、口算。
7.9+0.4=8.9+2.9=0.84-0.1=2.7+0.7=
2.7-0.9=8.7+4.1=0.65-0.31=2.7+0.4=
6.8+0.1=6.4-2.8=0.65-0.23=3.1+0.4=
6.9-0.4=7.2+1.3=0.77-0.21=7.2+0.8=
8.8-0.2=6.4+4.5=0.7+0.38=3.5+0.5=
7.8-0.7=6.1-4.7=0.76-0.37=7.7-0.3=
8.4-0.3=7.6+2.1=0.72-0.16=8.4-0.5=
2.4-0.9=8.5+2.3=0.84-0.1=1.5-0.3=
二、混合运算。
0.68+0.16+4.86.8-0.7-0.367.7-48.4-16.5
66.49+11.61+21.279.5+29.2+99.665.75-2.37-1.11
90-(6.86-0.64)93.7-(21.2+5.2)6.2+3.31+2.79
一、口算。
5.7+0.1=6.5-1.6=0.82-0.23=6.1-0.4=
1.2-0.4=7.9-3.3=0.76+0.28=1.9-0.2=
4.8-0.
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