人教版四年级数学下册小数加减法混合运算专项练习题18.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18.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18
一、口算。
8.5+0.8=6.2-3.5=0.7-0.34=5+0.9=
8.4-0.9=7.3+2.2=0.65+0.14=1.8+0.3=
2.7+0.7=7.8-1.8=0.65-0.11=6.9-0.2=
4.4-0.4=7.2-2.7=0.88-0.45=2.8+0.4=
6.2-0.3=6.9+0.2=0.76+0.48=3.9+0.8=
1.2-0.9=8+3=0.73-0.1=6.6-0.9=
4.1-0.9=7.1-0.5=0.61-0.33=7.1-0.7=
8.5+0.8=6.4-1.9=0.67+0.3=1.1-0.7=
二、混合运算。
0.7+0.12+9.49.3-0.68-4.3239-14.5+16.6
70.46+44.3+13.4861.02-29.43+59.859.48-3.5-1
30-(9.08-0.81)92+(26.6+8.5)9.87-6.01-2.7
一、口算。
7.2-0.7=6.9-2.2=0.8-0.42=5.2-0.7=
1.6-0.8=6.7-0.2=0.84-0.21=1.7+0.9=
1.1-0.3=6.8+3.1=0.63+0.33=6.5+0.7=
6.9-0.6=7.3-1.3=0.69-0.19=5.3-0.7=
8.1-0.1=7.6+4.6=0.9-0.23=5.6+0.9=
8.7-0.8=7.4+0.8=0.61+0.36=3.4-0.5=
2.7+0.4=7.2-4.4=0.78-0.43=5.3-0.4=
2.5+0.9=7.3+0.6=0.78+0.48=4.4+0.7=
二、混合运算。
0.6+0.06+4.47.9-0.79-2.2164.8-28.7+30.2
69.74+39.68+74.8882.14+32.91+49.535.21-2.11+1.49
30-(5.26-0.69)76.3-(13.5+5.7)9.16+1.55+2.87
一、口算。
6.8-0.7=7.4+0.4=0.81+0.24=4-0.2=
1.2+0.8=8.8+3.6=0.64-0.21=2.7-0.6=
2.7+0.5=7.7+4.2=0.77+0.47=5.3+0.7=
3.1+0.9=6.5-0.7=0.84-0.34=1-0.6=
2.3-0.7=7.1+3.4=0.81+0.43=2.6+0.7=
2.3+0.6=6.9+4.7=0.87+0.03=4.2+0.4=
2.6+0.7=6.9+1.5=0.79+0.26=1.9-0.4=
1.3+0.1=6.7+2=0.71+0.45=6.1-0.7=
二、混合运算。
0.74+0.34+86.7-0.2-4.897.7+68.9+14
72.9-27.18+70.5984.02-19.75+68.585.62+3.37-1.75
40-(7.64-0.66)90.1-(20+9.8)7.45+4.26-2.99
一、口算。
8.2-0.3=8-0.5=0.74-0.11=4.5-0.1=
1.9+0.8=7.6-0.3=0.81+0.2=4.4-0.5=
7.9+0.5=8.2+2=0.72+0.2=4.5-0.1=
3.9-0.6=7.1-0.6=0.8-0.41=7.3+0.6=
1.6-0.1=8.3-4.3=0.82+0.44=1.5+0.3=
7.7-0.4=7.2+1.8=0.67+0.15=3.7+0.1=
2.4+0.7=6.6-0.3=0.88-0.04=2.8+0.8=
3.2-0.5=7-2.9=0.73+0.37=7.6-0.8=
二、混合运算。
0.76+0.43+7.37.6-0.35-3.6541.1-19.6+14.2
68.52+21.29+52.7965.1-48.89+97.624.11+2.1+1.33
40-(5.21-0.77)81.1+(13.5-8)8.74+6.63-1.29
一、口算。
8.1-0.7=7.2-3.3=0.71+0.04=6.6-0.9=
6.9-0.5=6.3-4.3=0.64+0.05=1.3-0.2=
6.7-0.4=8.2-1.7=0.7+0.04=1.9-0.8=
6.9-0.7=7.2-4.7=0.74+0.19=3.2-0.7=
3.2-0.1=6+0.9=0.82+0.06=7.9+0.4=
6.4+0.7=8.8+4.5=0.83+0.27=6.9+0.1=
6.8-0.6=6.5-3.3=0.65-0.3=6.7-0.4=
1.5+0.1=6.8+0.2=0.83-0.02=6.4-0.4=
二、混合运算。
0.82-0.32+8.95-0.15-4.8558.1-13.2+42
66.28+45.2+38.7565.23-29.54+34.947.29+3.82-3.17
60-(9.34+0.68)98.3+(23.7-3.8)9.83-1.19+5.04
一、口算。
2.3+0.9=6.5+0.4=0.67+0.09=8.8+0.7=
7.3+0.8=7+2.4=0.82+0.07=3.1-0.7=
8.9+0.5=7.3+1.6=0.84+0.33=1.4+0.5=
5.3-0.1=8.9-0.2=0.68-0.06=3.2-0.8=
7.6-0.6=6.8+1.8=0.85+0.11=3.8-0.1=
6.6-0.1=8.5+1=0.89-0.22=7.9-0.6=
6.3+0.2=7.3+3=0.9-0.46=4.3-0.1=
2+0.9=8-4.4=0.77-0.23=5.5-0.2=
二、混合运算。
0.83+0.16+1.17.1-0.35-3.6555.7-22.4+12
78.19-45.31+93.9568.04+47.47+51.35.65+1.15+3.96
80-(8.58-0.3)95.6-(28.9-1.3)3.95+1.8-1.55
一、口算。
3.4+0.2=8.4+2.5=0.66-0.36=7.1-0.4=
8-0.7=8-3.3=0.9-0.18=7.2+0.9=
4.5-0.4=8.5-1.6=0.77+0.41=7.7-0.4=
5.6-0.2=8.9-2.5=0.82+0.31=3.8-0.8=
2.7-0.4=8.7-1.5=0.75+0.42=5.8-0.2=
1.6-0.2=7.7+2.5=0.65+0.4=6.3+0.5=
3.2+0.4=6+4.5=0.85+0.35=5.7-0.5=
2.8+0.6=8.7+0.7=0.78+0.38=3.7-0.8=
二、混合运算。
0.65+0.08+3.69-0.68-2.3247.5-25.1-10.5
71.79+23.7+37.5483.79+12.34+27.368.4+4.38-3.29
80-(6.5+0.22)77.3-(26.1+3.1)6.11-4.54-1.09
一、口算。
6.5+0.6=6.7-3.4=0.75-0.4=7.5+0.7=
8.7-0.3=7.7+1.7=0.67+0.25=8.7-0.1=
8.1+0.1=8.3-4.7=0.73+0.1=2.4+0.9=
8.4-0.3=8.9+3.2=0.65-0.46=8.1+0.1=
4.6+0.7=7-2.6=0.7+0.22=8+0.9=
5.2+0.9=7.3+3.9=0.87+0.26=3.3+0.1=
1.8+0.7=6.3+1.3=0.75+0.01=7.7-0.6=
8.4-0.6=6.4-4.2=0.78-0.25=8.5-0.3=
二、混合运算。
0.82+0.24+3.65.1-0.71-4.2999.1+56.8-12.1
79.26+32.92+37.4374.05+34+37.348.27-2.99-1.67
70-(5.92-0.28)68-(26.2-4.9)9.57-7.63+1.29
一、口算。
5.5-0.2=6.7+2.5=0.77-0.39=6.7+0.8=
4.1-0.1=7.3+2.6=0.73-0.13=7.2+0.6=
5.7+0.2=7.5-2.9=0.88-0.04=2.1-0.2=
3.6+0.7=6.1+0.1=0.65+0.16=2.8-0.8=
6+0.4=8.6-2.2=0.63+0.07=2.8+0.4=
5.4+0.9=8.1-4.6=0.61+0.23=2.5-0.1=
3.3+0.7=6.8-1=0.89+0.22=1.8+0.5=
3.8+0.4=6.5+2=0.64+0.44=6-0.1=
二、混合运算。
0.74+0.06+8.28.7-0.69-2.3181.3-16.8-30.5
82.74+42.8+36.5362.95+24.25+88.969.06-6.22+1.41
90-(6.64-0.53)90.4-(29.6-6.7)8+5+1.44
一、口算。
7.9-0.6=6-0.8=0.86-0.03=6.4-0.4=
3.3-0.4=7.8+4.1=0.67-0.2=7.9-0.7=
2+0.7=8.5-4.7=0.82-0.11=8.9+0.9=
5.8-0.9=7.8+3.3=0.69-0.2=5.3+0.8=
4.9+0.5=8.3+1.6=0.63+0.44=1.5-0.1=
3-0.8=6.9-2.7=0.68+0.4=5.4+0.5=
6.3+0.6=7.4-3.1=0.8-0.01=8.7+0.5=
8.2+0.2=7+2.1=0.88-0.1=7.3-0.5=
二、混合运算。
0.85+0.19+5.85.8-0.33-2.6766.1+11.7+43.8
87.5+21.98+25.877.95+31.2+12.148.99-1.01+2.87
30-(9.62+0.23)98-(14-6.3)6.98-2.32+1.9
一、口算。
6.3-0.3=7-4.2=0.6+0.25=8.5+0.2=
1.6+0.1=8.3-3=0.87-0.25=3.9+0.7=
4-0.2=7.8+2.8=0.9+0.28=3.8-0.4=
7.1+0.5=7+0.1=0.84+0.21=2.9+0.1=
7.5+0.4=8.1-3.4=0.78+0.09=7.7+0.7=
7+0.4=6+4.9=0.7-0.48=2.2-0.8=
8.2-0.3=8.5+3.3=0.85-0.35=2.2-0.2=
5.7+0.1=8.5+0.4=0.78+0.06=7.1+0.5=
二、混合运算。
0.9+0.23+1.47.3-0.6-1.493.7-15.6+60.1
76.57-39.18+55.2174.93-13.71+85.876.52+1.23+1.33
20-(9.18+0.63)73-(21.1+7.2)7.04+4.82+1.99
一、口算。
2.5-0.2=8.2+1.7=0.87+0.47=5.3-0.9=
7.7-0.4=7.5-1=0.86+0.07=3.9-0.4=
3.8-0.1=7.7-1.4=0.7+0.33=3.9-0.6=
5.3+0.6=7.2+1.8=0.8+0.38=6.2-0.9=
3.7-0.9=6.4-4.3=0.81-0.28=2.4-0.9=
1.4+0.2=6.1+1.3=0.69+0.22=4.4+0.1=
7.1-0.9=8+2.9=0.74-0.02=6.6+0.1=
8.3-0.9=6.2-0.8=0.81+0.23=2.8-0.4=
二、混合运算。
0.77-0.06+2.86.4-0.27-2.7365.6+33.8+18.2
70.14+22.76+19.6971.22+30.44+13.433.72+1.47-1.07
30-(7.3+0.51)89.1-(25.4-8.7)5.94-3.34+1.06
一、口算。
4.7-0.1=7.8+3.2=0.87-0.36=5.3+0.8=
8.6+0.3=8.9-3.4=0.72-0.12=7.8-0.5=
7.2+0.3=7.5+4.3=0.63-0.05=2.3-0.4=
4+0.7=8.8+3.7=0.62+0.16=2.8+0.8=
6.5+0.4=7-0.9=0.81+0.14=5.2-0.8=
6.7-0.3=6.9-4.4=0.87-0.39=7.6-0.5=
2.6-0.7=8-2.3=0.6-0.23=3.5-0.8=
4.7+0.4=7+4.2=0.65-0.38=8.6+0.2=
二、混合运算。
0.66+0.13+6.36.4-0.4-1.698.6-56.8+12.9
77.4+44.58+83.768.43+32.38+63.488.9-4.37+3.14
20-(4.85-0.87)70.5-(22.8+9.8)8.5-4.77-2.95
一、口算。
5.8+0.9=6.6+4.6=0.85+0.47=3.3-0.2=
3.8+0.9=7.3+0.2=0.67-0.39=7.7+0.8=
1.5+0.1=6-0.9=0.8+0.1=4.5-0.1=
4.5+0.9=7.7+1.7=0.67+0.05=2+0.4=
1-0.5=9+3=0.69+0.18=6+0.1=
6.3+0.8=9+0.7=0.83+0.07=4.8-0.2=
4.5-0.3=7.6-3.6=0.7+0.34=3.9+0.6=
7.8+0.8=6.9+2.5=0.68+0.12=4.6+0.8=
二、混合运算。
0.89-0.2+4.26.6-0.2-3.892.6-54.1-29.4
80.12+18.7+38.2672.99-32.92+62.788.76+3.33-4.11
90-(3.75-0.13)84.1+(24+6.1)9.42-5.28-1.23
一、口算。
2.6-0.5=7.7+3.3=0.9-0.19=8-0.1=
8.9-0.4=7.4+1.2=0.62+0.25=4.8+0.6=
5.9-0.2=6-1.5=0.68-0.24=4.1+0.4=
8.8-0.3=6.8-2.1=0.9-0.27=2+0.5=
8.6-0.3=8-1.2=0.61-0.43=5.1+0.2=
7.2+0.3=7.4+0.2=0.71-0.11=4.8-0.3=
6.3-0.1=6+4.5=0.61+0.27=3.6+0.8=
3.3-0.5=6-1.5=0.7-0.44=3.9-0.4=
二、混合运算。
0.77-0.01+7.68.6-0.23-4.7773.3+21.9+43.4
69.25-14.8+22.5488.07+48.08+68.483.82+1.43+1.3
40-(1.85+0.18)66.5-(13.9+9.6)6+1.58-3.4
一、口算。
2+0.5=6.6+2.9=0.61-0.44=1.3+0.4=
5.3-0.8=6.6+3.5=0.6+0.16=1.3-0.9=
6.8-0.3=6.4-3.8=0.62+0.22=2.4-0.8=
2.7+0.5=6.4+3.3=0.63-0.2=8.7-0.2=
6.5+0.7=6.1+2.1=0.86+0.34=1.6-0.2=
1.5-0.6=8+2.7=0.72-0.38=6.9-0.8=
7.8+0.6=7.7-4.9=0.79+0.31=7.1+0.8=
2.4+0.6=6.5+0.7=0.78-0.2=8.8-0.1=
二、混合运算。
0.76-0.04+8.39.8-0.52-1.4898-59.7+29.2
73.78+39.76+70.0861.96-25.72+52.098.67+3.99-4.15
70-(3.83+0.21)71.2+(24.3-7.6)8+3.46-2.25
一、口算。
3.5-0.9=6.2+1.8=0.89+0.08=6.5-0.2=
8.4-0.6=7.8+1.1=0.68-0.46=3.4+0.4=
1.1-0.4=6.4-1.2=0.61+0.16=3.9-0.8=
1.6-0.6=7.4-0.8=0.85-0.07=6.9-0.7=
6.6-0.2=8.1-3.6=0.8+0.22=5.1+0.7=
3.8+0.3=8.2-1.3=0.71-0.33=6.6-0.4=
3.2-0.7=6.4-3.7=0.61-0.07=1.3+0.1=
2.7+0.8=6+3.4=0.62-0.43=2.2-0.8=
二、混合运算。
0.74-0.14+3.35.7-0.37-3.6361.6-13.8-43.1
75.26-15.7+47.3978.96+14.54+92.995.05+2.6-1.06
60-(9.42-0.51)71.6+(26.5+4.1)7.69+2.24+2.13
一、口算。
8.6+0.7=8.7-1.7=0.89+0.49=1.3-0.9=
4.6+0.4=7.1-0.8=0.61-0.04=4.3-0.9=
6+0.8=7.2+3.3=0.77-0.32=8.5+0.1=
5.1-0.3=8.6+3
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