人教版四年级数学下册小数加减法混合运算专项练习题115.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115.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115
一、口算。
7.6-0.9=6.3+2.5=0.76+0.07=4.3+0.4=
4.4+0.2=7.4+0.8=0.89+0.09=6.9+0.6=
1.7+0.3=7.4+2.4=0.66+0.16=2.8-0.7=
8.5+0.6=8.8+2=0.66+0.17=8.4-0.6=
1.2+0.6=7.4-0.3=0.9+0.25=8.4+0.1=
8.1-0.7=7.8-3.7=0.63+0.3=6.5-0.9=
7.2-0.6=8.7+3.4=0.84-0.02=7.3-0.5=
4.8-0.4=7.5-1.8=0.71+0.29=1.1-0.6=
二、混合运算。
0.76+0.25+46.6-0.65-0.3562.2+37.2-15.7
78.45+17.92+83.874.32-19.96+59.127.17+2.54+2.48
80-(7.39-0.71)67.6-(25.9-5.9)7.54+3.39+2.21
一、口算。
8.1+0.8=8.2+3.8=0.63-0.21=6.9+0.5=
1.8+0.4=8.5+4.7=0.79+0.27=8.9+0.8=
3+0.1=7.2-3.8=0.68+0.47=8.2-0.2=
7.4+0.1=6+0.3=0.89+0.21=8.2-0.3=
4.3-0.3=6.2+1.9=0.63-0.48=9-0.3=
4.8-0.1=6.4+4.7=0.82+0.43=5+0.6=
5.2-0.7=8.5+0.5=0.68-0.19=8.8-0.7=
2.9+0.7=6.8+3.7=0.68+0.46=4.5-0.3=
二、混合运算。
0.88+0.38+3.98.1-0.57-1.4376.9+52.5-17.8
81.2-18.06+64.5685.4-38.91+25.284.16-1.28-2.74
40-(5.86+0.98)84.7+(11.1-4.1)5.84-2.84-2.89
一、口算。
1.9+0.6=7.9+3.2=0.8-0.48=4.6+0.7=
4.7+0.1=6+0.3=0.71-0.48=3.9+0.5=
6.3-0.2=6.1+3.8=0.64+0.47=3.3+0.6=
1.2+0.4=7-0.1=0.67+0.09=6.8+0.1=
4.1+0.2=7.9-1=0.76+0.43=6.5+0.1=
8.2+0.9=7.5-1.3=0.67+0.24=3.5-0.8=
4.4-0.3=7.5+3.3=0.73-0.18=5.9+0.6=
6.8-0.5=8.9+4.6=0.77-0.45=8.2-0.4=
二、混合运算。
0.75-0.36+8.67.6-0.9-3.160+11.2+41
81.08+45.66+60.567.45-17.36+24.288.74-7.18+1.07
30-(2.68-0.86)94+(26+3)8.54-5.64-2.25
一、口算。
5.5-0.5=6.4+4.9=0.64-0.11=1.6+0.3=
1.2-0.4=8.4-1.7=0.62+0.4=7.5-0.9=
7.6+0.7=6.9+3=0.74-0.02=6.4-0.1=
1.7+0.8=7.1-0.8=0.78+0.36=2.8+0.2=
5.8+0.9=6.6-2.6=0.67+0.08=2.5-0.9=
8.7+0.9=8.9-1.2=0.68-0.39=2.3-0.6=
7.8+0.1=7-0.9=0.72-0.12=6.1-0.8=
3.2+0.3=9+4.1=0.87-0.49=3.9-0.8=
二、混合运算。
0.74-0.08+1.27-0.17-0.8339.5+22.5+13.9
79.39-14.25+24.889.41-10.68+12.059.77-4.56+4.62
30-(3.94-0.44)83.4-(29.5-7.4)9.23+5.37-3.29
一、口算。
7.8+0.7=8.6-3.3=0.76-0.26=7.8+0.8=
5+0.8=8.9+4=0.88-0.13=6.9+0.4=
5.3-0.6=7.2-4.9=0.74-0.23=4.8+0.5=
3.5-0.1=7.6-2.9=0.67-0.22=3.1+0.9=
2.5-0.6=8+4.7=0.86-0.48=4.6+0.5=
1.4-0.2=8.9-4.4=0.89+0.2=1-0.9=
3.9+0.2=8+2.9=0.71+0.04=8.5+0.2=
2.9-0.3=6.3-3.1=0.73+0.28=1+0.1=
二、混合运算。
0.74+0.13+7.67.1-0.46-1.5451.9+20-21.8
89.67+31.98+19.2782.26-27.45+95.25.94+3.17+2.65
90-(9.95-0.89)79.5-(18.6-1.6)7.04-5.43-1.58
一、口算。
5.4-0.8=6-3.7=0.82-0.25=7.8+0.3=
6.8-0.2=8.2-3.8=0.73-0.05=6.6-0.7=
6.5+0.4=6.2-2.5=0.65-0.3=6.7-0.2=
8.8-0.4=7.3+2.5=0.82-0.26=4.2-0.2=
5.3-0.1=7.7-1.4=0.65+0.3=1.1+0.7=
3.6-0.9=7.6+3.3=0.79+0.04=3.3+0.7=
6.4-0.6=6.7-0.2=0.89+0.03=5.1+0.5=
1.8-0.8=9-0.4=0.64+0.24=8.2-0.4=
二、混合运算。
0.61-0.25+5.68.3-0.49-2.5179.2+35.9+15
89.56+39.98+23.4566.18+15.05+73.734.87+2.5+1.13
20-(5.74+0.58)92.8+(18.1-2.3)4.59-2.38+1.72
一、口算。
7.6-0.1=6.9-2.4=0.88+0.44=4.1-0.1=
2.9+0.2=7.8-3.5=0.63+0.08=7.6-0.5=
7.3+0.9=8.7+3.1=0.69+0.31=7.5+0.6=
8.5-0.4=6.4-0.2=0.83-0.12=2.1-0.1=
5.9-0.1=7.9+4.2=0.68-0.24=5+0.7=
8.2+0.7=8.1+3.1=0.8-0.29=4.4-0.7=
6.7-0.7=6.1+3.7=0.74-0.16=3.6-0.7=
6-0.4=7.8+0.7=0.76-0.1=6.6+0.2=
二、混合运算。
0.88-0.47+6.79.9-0.75-1.2587.3-64.8+18.9
87.4-31.18+29.8181.29-12.77+57.246.53+4.8+1.43
90-(5-0.21)88.4+(24+7)6.76-1.65-3.33
一、口算。
8.4+0.1=7.5+3.7=0.6+0.11=4.4-0.6=
6.4-0.2=8-1=0.77-0.18=5.7-0.3=
4.2-0.3=7.1+1.8=0.69+0.43=7.5-0.7=
4.6+0.7=7-1.5=0.64-0.11=7+0.7=
4.7+0.9=7.7+4.7=0.81+0.06=5-0.1=
3.1+0.5=8.8-3.9=0.81-0.01=2.2+0.6=
6.3-0.9=7-4.6=0.87-0.3=6.5-0.8=
5.3-0.6=6.7+2.1=0.63-0.07=2.1+0.2=
二、混合运算。
0.72-0.47+7.78.9-0.85-1.1593.1-65.8+20.3
81.99+46.15+53.374.57-34.46+45.788.62+3.38-2.08
20-(5.29+0.18)68.5+(12.1-7.2)4.56-1.51-1.57
一、口算。
7.2-0.4=8.3+2.6=0.77+0.06=1.6-0.6=
1.3-0.1=6.3-1.4=0.65+0.22=8.5-0.9=
4.7-0.2=7.1+3.1=0.8-0.04=4.9+0.2=
1.3-0.5=7.5+2.6=0.76-0.38=6.2+0.9=
3.8-0.6=7.1+3.7=0.74-0.04=7.5-0.9=
6.3+0.1=8.6+4.4=0.83+0.06=5.2+0.6=
5.6+0.4=7.6+3=0.74-0.32=4.8-0.1=
2.9+0.3=8+0.1=0.89+0.2=4.2+0.7=
二、混合运算。
0.7+0.07+5.96.7-0.51-0.4997.5+59.1-22.7
61.24+16+94.2667.82+48.59+96.639.21-5.39-1.88
30-(6.38-0.51)96.9-(18.2-4.3)6.57+2.22+3.3
一、口算。
7.9+0.2=6-1.1=0.78+0.15=4.4-0.4=
8.1-0.9=6.8-2.1=0.79-0.13=1.6+0.2=
6.1-0.2=8.5-3.1=0.77+0.09=5.3-0.6=
8.3-0.3=8.2+2.1=0.7+0.33=6.4+0.2=
2+0.7=6.9-0.9=0.69+0.13=8.5+0.9=
2+0.4=9-0.5=0.76+0.04=2.9+0.6=
6.3+0.7=6.4-4.7=0.66+0.37=5.7-0.1=
8.7-0.1=7.3-0.7=0.81+0.17=3.5+0.2=
二、混合运算。
0.7+0.07+5.57.1-0.8-0.264.9+45.3+15.7
84.98-10.27+91.1163.52+36.6+15.736.92-5.39+1.22
30-(1.23-0.19)88.8-(23.9+1.2)9.26+2.06-4.91
一、口算。
7.2+0.5=6.4-4.9=0.69-0.25=1.7+0.9=
4.5-0.4=7.3+2.4=0.78+0.17=5.2-0.5=
5.2+0.2=8.6+0.1=0.67+0.34=1.2+0.2=
3.3-0.9=7.6+3.9=0.81-0.03=6.4+0.8=
2.9+0.6=7.7+1.7=0.83+0.48=5.9+0.9=
3.9-0.8=6.6+3.1=0.76+0.17=3.4-0.5=
7.4+0.6=8.1+0.3=0.64+0.01=1.6+0.9=
5.2-0.2=7.3+0.9=0.75+0.15=3.6-0.1=
二、混合运算。
0.6+0.12+3.78.1-0.44-3.5677.7-17.6-51.7
60.36+20.03+41.871.07+26.62+89.257.77-6.14+1.21
70-(3.29-0.4)76.2-(28.9-6.2)5.1-1.6+1.4
一、口算。
6.5+0.4=6.3-0.9=0.71+0.07=3.7+0.2=
1.5-0.4=8.1+2.3=0.83-0.16=1.6+0.9=
1.1-0.8=8+0.7=0.64+0.27=6.6-0.4=
4+0.4=7.4+2.9=0.88-0.37=4.5+0.3=
2.9-0.2=6.5-1.6=0.85+0.18=8.6+0.9=
4.3+0.8=6.7+1.1=0.74-0.01=2.5-0.7=
2.1+0.1=6.9-4.1=0.64+0.37=4.6+0.2=
1.5+0.1=6.9+0.3=0.86-0.19=1.7-0.4=
二、混合运算。
0.71+0.45+7.98.9-0.7-0.348.3-24.7+20.2
64.63-28.55+54.0887.89+47.66+60.237.47-1.33+5.07
40-(4.34+0.56)84.9-(12.9+1.1)3.89-1.87-1.79
一、口算。
5.7-0.9=7.4-4.9=0.78-0.12=2.2+0.8=
1.8+0.8=6.3+3.6=0.61-0.33=2.7+0.8=
8.7-0.2=8.1-4.5=0.67-0.33=2.7+0.4=
1.1-0.7=6.3+0.6=0.81-0.05=6.1-0.7=
3.7+0.7=6.9-4.7=0.63-0.18=7.5+0.9=
1.4+0.3=6.1+1.8=0.81-0.02=3.1+0.6=
5.1-0.5=9-2.6=0.86-0.44=3.2-0.1=
8.5+0.9=6.9+1.4=0.89+0.31=7.6-0.3=
二、混合运算。
0.84+0.49+4.68.9-0.49-1.5177.9+29.3-22.4
80.77+41.77+87.180.46+12.55+72.218.3-1.69-5.89
20-(4.59-0.84)95.4-(19.2-3.3)9.07-1.82-2.38
一、口算。
4.6+0.7=7.4-2.2=0.73-0.34=4.1-0.3=
1.5-0.2=7.6-4=0.89-0.4=1.2-0.6=
6.8-0.9=7.4+1.6=0.71-0.24=1.6-0.1=
1.8+0.1=8.9+3.7=0.66-0.34=2.4-0.5=
9+0.2=6.7-3.8=0.83+0.03=1.9+0.1=
3.1-0.8=8.3+0.6=0.66-0.47=5+0.1=
9-0.9=6.3+0.1=0.69-0.19=8.5+0.8=
2.7-0.4=7.6+1.5=0.86+0.37=5.9+0.5=
二、混合运算。
0.86+0.19+7.89.9-0.65-4.3549.9+15.4-31.7
82.12-28.19+65.3685.03+24.15+20.179.33-7.64+1.19
50-(9.29+0.48)85.8+(17+7.4)8.93-5.21-1.57
一、口算。
8.7+0.4=7.7-0.5=0.6+0.06=5.9+0.6=
3-0.8=8.6-1.2=0.75+0.42=8.3+0.8=
4.2-0.3=8.4+4.9=0.81+0.22=2.5-0.4=
1.8-0.1=7.1+3.8=0.8-0.07=8.6+0.3=
7.3-0.6=8.7+2.9=0.62+0.16=9-0.1=
8.9+0.3=6.2+1.6=0.87+0.06=6.7+0.3=
3.3-0.5=7.9-3.3=0.82-0.4=9+0.9=
2-0.4=8.7-0.2=0.85-0.38=8.2-0.2=
二、混合运算。
0.7+0.06+6.19.5-0.64-3.3680.3+32.4-17.5
87.63+37.6+57.0280.81+29.2+57.635.44+1.4-3.55
90-(9.82+0.93)84.6+(28.4+9.1)7.97+4.53+3.35
一、口算。
2.4+0.8=6.4+3.6=0.82+0.22=4.7-0.9=
2.7+0.1=7.3+3.2=0.6+0.37=5.8+0.2=
1+0.1=7.6-4.8=0.84+0.39=6.5-0.4=
5.1-0.8=8.6-1=0.69+0.02=6.5+0.2=
3.2-0.1=8.6-1=0.61-0.17=3.5+0.2=
5.7+0.4=8.6-0.4=0.88-0.25=3.4-0.8=
8.8-0.3=7.5-1=0.7+0.15=5.1+0.3=
3+0.5=8+1.9=0.66+0.31=3.9-0.7=
二、混合运算。
0.65-0.14+7.25.1-0.41-1.5999.5-46+33.8
77.42+35.38+39.5368.33-47.54+76.483.74-1.81+1.84
50-(4.05-0.88)68.1-(18.5+8.3)4.44-1.46+1.77
一、口算。
1.2-0.3=8.8+0.4=0.67-0.44=8-0.2=
7.1+0.7=8.6-1.9=0.74+0.01=3.5-0.1=
8.2+0.7=8.4-0.9=0.75-0.22=7+0.3=
3.4-0.6=8.8-2.8=0.61+0.31=5.4+0.7=
3+0.7=6.3-2.9=0.64-0.09=8.1+0.8=
2.2+0.1=7.8+2.7=0.68-0.36=1.6+0.3=
7.7-0.3=7.6+2.2=0.85-0.26=4.4+0.8=
8.7+0.1=8.1-0.8=0.83+0.36=4.3+0.6=
二、混合运算。
0.9+0.08+6.26-0.57-2.4345.1-21.7-15.7
81.36-37.36+58.5360.82+26.39+55.739.83+7.88+1.73
80-(7.12-0.52)98.2+(11.1-9.6)4.53+1.12-3
一、口算。
4.3-0.4=7.6+0.8=0.78-0.37=1.6-0.5=
1.9+0.3=6.3+2.9=0.89+0.04=3.4+0.8=
5+0.2=7.9+4
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