人教版四年级数学下册小数加减法混合运算专项练习题122.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122.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122
一、口算。
7.1+0.8=8.3+1.7=0.86-0.12=1.9+0.5=
2.1+0.9=7.8-0.4=0.78+0.13=2-0.8=
2.8-0.2=9+1.3=0.7-0.45=3.9-0.8=
6.2-0.9=6.1-1.5=0.76-0.27=3.2+0.3=
4.4-0.8=6.4+2.5=0.76-0.05=1.2-0.5=
5.4-0.3=8.1+4.1=0.9-0.11=4.9+0.2=
5.5-0.8=8.3+1.3=0.7-0.16=4.9-0.4=
8.3-0.8=7.4+0.9=0.64+0.49=7.4-0.6=
二、混合运算。
0.9+0.02+4.59.1-0.48-3.5291.3-14.5-15.2
67.84+34.39+59.0671.82+10.76+88.613.63+1.62+1.95
40-(9.18+0.56)82-(15.5-1.9)9.63+1.91-6.76
一、口算。
6-0.6=8.5+1.6=0.82-0.3=3.2-0.2=
6.9+0.3=8.9-4.1=0.61-0.23=2.3-0.9=
6.2-0.7=7.3-2.7=0.68+0.31=4.2+0.9=
4.7+0.5=6.3-4.1=0.89+0.35=4.1-0.1=
8.3-0.3=8.7-2.5=0.83-0.21=3.7+0.7=
8+0.1=6.3+0.1=0.89-0.23=5.3-0.6=
3.7+0.8=6.2-0.4=0.72+0.14=1.3+0.6=
3+0.3=8.5-3.8=0.68-0.26=2.9+0.2=
二、混合运算。
0.84+0.32+3.88.1-0.82-0.1849.3+24.7+15.8
70.42-30.28+92.3372.01-41.49+31.883.51+1.16-2.28
90-(8.43+0.64)89.1+(24.4-5.2)4.59-1.55-1.71
一、口算。
8.8-0.3=8.7+4.2=0.6-0.23=4.2+0.8=
6.8+0.5=8.3-4.2=0.72+0.23=1.9-0.5=
3-0.5=8.3-0.2=0.7-0.31=1.2+0.7=
2.6-0.8=8.6+3.7=0.83-0.49=5.8+0.7=
1.4-0.9=6-2.7=0.78+0.03=8.8+0.4=
8.1+0.6=8.1-3.5=0.69-0.1=5.5-0.6=
6.2-0.7=7.2+4.5=0.76-0.4=2.7-0.7=
1.2-0.9=6.5-3.8=0.72-0.44=6.4-0.3=
二、混合运算。
0.65+0.38+5.78.9-0.64-3.3657.4-18.8+12.6
72.38+38.79+42.0584.53+26.05+76.055.89+1.93+2.5
80-(5.22-0.72)66.2-(25.1+1.9)6.16-4.18+1.11
一、口算。
7.1-0.3=6-1.8=0.62+0.49=6.1+0.6=
1.1-0.7=7.1+1=0.68-0.17=4.6+0.6=
2.7-0.9=7.5+3.2=0.74-0.35=2.6-0.9=
5.7-0.3=6.9+2=0.62+0.2=3.4-0.7=
1.7+0.9=7.4+3.8=0.82+0.14=6.4+0.6=
2.6+0.5=6.1-2.2=0.84+0.25=7.2+0.3=
8.3+0.5=7.7-2.6=0.86+0.29=8.4-0.6=
6.5-0.6=7.9+3.2=0.87-0.3=3+0.4=
二、混合运算。
0.83-0.02+8.36.1-0.86-1.1449.4-32.4-15.5
81.11-18.77+14.5176.28+34.93+95.326.65-4.39+1.59
40-(2.01-0.26)60.4+(16.5-9.6)5.07+1.11+3.89
一、口算。
3.9+0.6=6.1-2.9=0.73-0.44=2.9+0.8=
4.8-0.7=8.1-2.9=0.79-0.06=6.3-0.7=
3.5-0.4=8.4+2.7=0.89+0.45=5.4-0.1=
4.7+0.7=7.2-4.8=0.77+0.22=4.3+0.6=
7.9-0.9=6.4+4.7=0.65-0.46=3.6+0.1=
2.2+0.6=6.6+3.1=0.77-0.07=1+0.2=
4.6-0.1=7.8+1.9=0.83+0.04=7.6+0.1=
5.8+0.3=8.4-4.7=0.72+0.08=6.5-0.3=
二、混合运算。
0.67-0.34+6.98.8-0.75-1.2552.9-26.3-15
85.29-27.82+79.8565.08+37.49+69.044.94-2.55+2.07
90-(8.6-0.56)84.1+(13.7-1.5)5.66-1.19-4.29
一、口算。
7.8-0.3=8.6-1.4=0.79+0.14=4.5-0.6=
3.1-0.7=8.8-0.6=0.8+0.19=4.8+0.9=
1.4+0.8=6.2+1=0.78-0.12=3.1+0.3=
8.8-0.4=7.6+2.9=0.66+0.41=4.4-0.2=
5.3-0.7=7.3+3.5=0.65-0.42=3.5-0.1=
7-0.9=7.3-2=0.9-0.29=6-0.5=
4.9+0.7=8.1+3.8=0.7-0.03=4.4-0.8=
3.4+0.4=8.6+3.5=0.7-0.16=7.1-0.8=
二、混合运算。
0.9-0.31+3.18.4-0.45-2.5588.5-39.1+41.8
88.01+21.52+77.3772.9+13.12+46.425.45-1.74+1.49
50-(7.62+0.97)96.2+(11.5+9.6)7.67-3.25-2.53
一、口算。
8.3-0.6=7.1+0.9=0.87+0.39=1.6+0.1=
7.4+0.8=6.4-2.4=0.9-0.01=6.9+0.7=
5.2+0.8=6.6+4.5=0.84+0.1=7-0.7=
7.1+0.8=6.8-0.6=0.81+0.21=6.2-0.2=
8.5+0.2=8.5-1.9=0.62+0.48=5.2-0.8=
3.7-0.2=6.2+3=0.85+0.03=2-0.2=
7.2-0.4=8.9+3.5=0.86+0.06=4+0.7=
6.8-0.1=6.5+4.2=0.85+0.04=5.7+0.8=
二、混合运算。
0.82+0.24+6.85.5-0.25-0.7598.6+69.3-15.2
72.77+36.86+90.8984.19+16.29+42.125.89+1.97+1.02
40-(1.25+0.66)81.1+(22.2+5.1)7.38+4.82-1.27
一、口算。
2.8+0.2=8.6+0.9=0.85-0.35=3.9+0.2=
2.9-0.3=8.5-1=0.65-0.01=5.3+0.5=
2.1+0.6=7.9-2.2=0.73+0.46=3.3-0.8=
3-0.3=6.3-3.3=0.66-0.42=6.3+0.7=
7+0.9=7.9-2.9=0.71-0.07=8.9-0.4=
6.5-0.5=7.8+3.1=0.72+0.12=7.7-0.4=
7.6+0.5=8+2.4=0.82+0.38=6+0.9=
3.5-0.7=6-3=0.62+0.04=3.2-0.3=
二、混合运算。
0.75+0.03+2.27.4-0.15-0.8542.9-14.7+15.8
81.7+27.24+86.4185.04+35.79+10.457.31+1.15-4.63
30-(5.37+0.89)89.6-(21.8+3.4)6.56+4.27-1.53
一、口算。
5.6-0.9=8.3-1.4=0.6+0.36=6.8-0.8=
8.2-0.3=7.5-3.7=0.72+0.13=5-0.7=
6.9+0.7=8.2+3.5=0.63+0.32=4.4-0.8=
4+0.9=7.9+0.7=0.76+0.17=8.7+0.2=
1.2-0.4=7.6-4.5=0.86+0.37=6.2-0.9=
3.4-0.3=8.7-3.1=0.62+0.43=3.3+0.4=
4.4+0.2=7.7-0.4=0.8-0.08=6.1-0.9=
2.6-0.8=6+0.2=0.71+0.43=2.1-0.4=
二、混合运算。
0.74-0.48+1.89.8-0.56-4.4472.6+44.1-27.1
79.74-17.69+50.7965.01-16.32+15.546.74-1.22+1.44
60-(7.9-0.42)77.2+(14.5+8)6.78-2.31-2.18
一、口算。
9+0.4=7.9-3.8=0.75-0.14=6.6-0.2=
1.2+0.7=6.4-1.7=0.81+0.23=3.2+0.8=
3.2+0.5=8.9+2.8=0.88+0.28=1.1-0.1=
3.4+0.1=7+3.3=0.62+0.43=6.8-0.5=
5.1-0.7=7.5+2.4=0.86-0.32=7.6-0.6=
8.8+0.4=8.6+3.1=0.6-0.12=2.5+0.6=
4.1+0.3=8-4.9=0.81+0.02=4.5-0.9=
8.6-0.4=6.2+3.5=0.78+0.4=1.3+0.2=
二、混合运算。
0.65-0.1+4.58.4-0.27-3.7372.7+22.8-19.2
72.84+34.06+22.1880.3-12.72+46.998.39-5.36-1.42
80-(6.72+0.82)96+(15.6+1.9)4.44-2.63+1.58
一、口算。
4.5+0.8=8.9-2.1=0.7-0.28=3.7+0.5=
2.1+0.1=6.1-2.9=0.82+0.11=1+0.2=
2-0.5=7+3.3=0.67-0.42=7.2+0.8=
4.7+0.6=6.3-3.1=0.69+0.03=8.4-0.1=
6.5-0.1=6.2+3.6=0.79+0.02=6.2-0.3=
7.1+0.3=8.1-0.7=0.62+0.28=2.4-0.6=
1.5-0.5=8.1-4.2=0.73+0.19=4.2-0.9=
6.3+0.5=8.1-0.5=0.61-0.32=4.8-0.4=
二、混合运算。
0.64-0.41+1.29.6-0.51-1.4999.7+28.7+22.2
67.67-35.63+37.1570.75-19.54+94.114.07-2.23-1.82
90-(2.52+0.73)94.6-(16.3-7)5.05+1.13-3.92
一、口算。
5.7+0.3=6.4-1.9=0.61+0.38=4.2+0.5=
2+0.1=7.1+0.3=0.85+0.46=8.8+0.1=
1.5-0.5=8.1-1.1=0.9+0.36=7.3-0.3=
4.1-0.2=6.4+0.9=0.87+0.31=4-0.3=
3.5+0.1=7.4-2.6=0.69+0.24=5.8+0.9=
2.1+0.6=6.7+0.7=0.86+0.29=8.4-0.2=
6.5-0.3=7.7+4.6=0.65+0.12=8.5-0.7=
6.6+0.7=6.9+3.2=0.8+0.21=1.1+0.7=
二、混合运算。
0.75+0.27+7.99.4-0.8-0.238.4+21.3+13.9
79.01-47.22+27.8485.54+11.4+51.397.61+3.43+2.4
60-(4.86-0.34)81.2+(27.1+3.8)3.88+1.55+2.12
一、口算。
1.8-0.2=8.5+1.9=0.8+0.13=6.1+0.8=
4.4+0.2=6.5+1=0.83+0.13=5.2+0.7=
4.2+0.6=7.8+4.8=0.76+0.14=1.6-0.8=
4.3-0.8=8.5-0.5=0.75+0.02=4.6-0.8=
3.2-0.6=7.6-2.6=0.9+0.41=7.3-0.1=
1.7-0.1=6.1+4.5=0.76-0.4=5+0.3=
5.5+0.3=6.1+2.3=0.88+0.41=2-0.3=
3.9-0.2=6.4-2.1=0.85-0.47=2.2-0.2=
二、混合运算。
0.63+0.14+7.48.2-0.67-1.3346.9+30.1+16.6
78.72+19.8+52.5477.06-44.34+52.637.57+4.12+1.33
90-(8.81-0.76)73.7-(27.3+2.2)8.13+1.72+1.2
一、口算。
2.9-0.2=7.9-0.3=0.86+0.37=5+0.7=
7.4+0.2=6.5-1.9=0.77+0.35=6.7-0.6=
8.1+0.9=7.3+4.1=0.85+0.16=3.4+0.6=
7+0.1=8.3-1.5=0.82+0.06=5.8-0.6=
7.9-0.6=7.6+1.8=0.86-0.48=2.7+0.4=
2.2-0.4=6.2-2.6=0.8+0.28=6.3-0.1=
4.4+0.2=7.2-3.7=0.77+0.27=7.3-0.9=
1.5+0.4=8+1.4=0.81-0.09=3.8-0.9=
二、混合运算。
0.77+0.44+4.39.8-0.22-3.7889.4+33.7+40.6
89.63-36.05+15.4373.98-22.16+33.825.75-3.02-1.31
80-(2.22-0.51)98.1+(27.1+8.8)6.41+2.18+2.87
一、口算。
7.3+0.2=6.9-4.4=0.65-0.12=1.8+0.8=
4-0.2=8.6-4=0.82+0.33=8.3+0.4=
1.8-0.2=7.3-3=0.84+0.32=4.4+0.3=
3.7-0.1=7.2+4.6=0.81+0.02=7.3-0.4=
7.7-0.6=7.2-0.1=0.7-0.28=6.1+0.5=
3.9-0.2=7.6+0.7=0.62+0.06=3.3+0.4=
3.1-0.7=6+1.2=0.65+0.02=4.9+0.1=
6.1-0.1=6.7+3.6=0.82-0.3=1.6+0.7=
二、混合运算。
0.7-0.44+2.57-0.81-4.1968.7+31-12.9
84.82-18.5+33.4663.51-13.82+15.623.64+2.01+1.04
70-(4.23+0.33)81+(22.3-2.2)6.77-3.15+1.34
一、口算。
2.7+0.5=8.1-2.5=0.89-0.24=3.5-0.4=
6.7-0.3=9-1.2=0.87+0.37=5.2-0.5=
6.2+0.3=6.2-3.1=0.76+0.48=8+0.3=
6.3-0.8=6.5-1.6=0.65-0.16=8.9+0.2=
5.2+0.2=8.9+0.5=0.75+0.37=5.3-0.9=
2.5+0.8=6.4-1.3=0.86+0.29=3.6+0.1=
7.2-0.8=6.5-0.5=0.7-0.13=4.3-0.3=
7.6-0.3=6.6-1.9=0.76-0.24=4.5+0.9=
二、混合运算。
0.74+0.26+86.1-0.6-1.436.3-17+10.6
67.33-23.73+14.6369.71+48.76+87.054.17-1.68-1.73
50-(9.96-0.98)97.7-(25.1-4.8)7.32-2.53+2.3
一、口算。
3.3+0.3=7.1+1.8=0.7+0.4=2.9-0.3=
4.7+0.6=8.8+0.3=0.9+0.14=4.5+0.5=
3.5-0.8=8.8-3.4=0.86+0.23=1.5-0.7=
2.2-0.6=8.7+3.3=0.89-0.3=1.2+0.4=
3.7-0.3=8.3-2.4=0.63+0.32=3.6+0.2=
7.8-0.7=6.3-1.2=0.8+0.16=3.6-0.7=
3.5-0.6=6.1+3.2=0.72-0.09=5.8-0.9=
2.4-0.7=6.4+0.3=0.6-0.43=4.8-0.5=
二、混合运算。
0.6+0.22+9.67-0.77-3.2395.7+68.6+11.6
60.17-47.56+75.7972.64+39.08+66.68.15+1.79-2.31
60-(7.32-0.93)64.3-(17.1+7.3)6.56+3.02+3.02
一、口算。
8.4+0.7=6.8-4.6=0.76-0.47=5.6+0.9=
6.6+0.2=8.9+4=0.64-0.38=3.6+0.2=
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