人教版四年级数学下册小数加减法混合运算专项练习题9.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9.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9
一、口算。
6.9+0.3=7.5+4.1=0.78-0.48=3.8+0.2=
1.5+0.8=7.1+2.4=0.83-0.14=3.9-0.6=
1.8-0.1=8.7-0.6=0.86+0.13=4.7-0.7=
7.4-0.2=7+4.1=0.6+0.35=6.1+0.1=
1.4+0.6=8.4+4=0.76-0.03=7.8+0.3=
3.5-0.8=7.8+1.7=0.65-0.28=5.8+0.3=
2.3+0.7=8.4+4.9=0.63-0.29=7.2-0.8=
7.6-0.4=8-2.9=0.86-0.25=6.1-0.1=
二、混合运算。
0.66+0.16+8.59.8-0.27-0.7376.3+37.6+15.7
66.25+22.36+27.9566.02-32.52+63.019.71+7.54+2.14
60-(4.37+0.54)69.6-(27.4+1.3)6.74+4.57-1.22
一、口算。
6.4+0.2=6.7-3.7=0.85-0.15=5.4+0.5=
8.3-0.9=8+4.1=0.8+0.35=6.3+0.1=
2.5-0.3=8.8+4.8=0.61+0.22=7.7+0.5=
4.2+0.4=7.5-4.1=0.88+0.43=4.3-0.2=
7.1-0.1=8.5-4.6=0.79+0.03=8.3-0.7=
1.3-0.2=9-2.8=0.69+0.19=4.9+0.2=
6.8+0.3=7.7+0.3=0.85-0.14=6.5+0.3=
5.1-0.2=8.6+1.4=0.88+0.27=2.9-0.1=
二、混合运算。
0.84+0.38+4.39.1-0.42-3.5853.6+29.8+20.5
63.6-23.01+84.6961.06+41.86+64.348.69-5.06-1.69
40-(8.05+0.67)62.5+(26.7-6.5)9.61+2.44-2.13
一、口算。
8.9-0.7=8+1.8=0.79+0.24=2-0.5=
7.9-0.6=6.3+1.6=0.67+0.15=6.2-0.2=
4.6-0.6=8.4+2.6=0.64+0.21=5.7-0.6=
4.1+0.5=6.5+2.6=0.64-0.44=1.7-0.6=
8.6+0.3=7.6+1.4=0.7+0.08=3.4+0.1=
4.5+0.2=8.5-3.9=0.89-0.17=5.6-0.3=
7.1+0.9=7.8+3.9=0.69+0.11=6.9-0.3=
8.5-0.3=8.7-4=0.83-0.12=7.2+0.4=
二、混合运算。
0.76-0.13+4.45.2-0.89-0.1144.3+12.2+10.3
67.71+25.32+94.4385.58-35.95+44.338.96-2.38-2.46
80-(6.29-0.73)67-(12.3+9.6)9.21-6.94-1.71
一、口算。
5+0.6=6.3-1.5=0.69+0.15=4.8+0.6=
8+0.6=8.3+1.5=0.88+0.3=1.3+0.8=
7.6-0.5=9+3.8=0.89+0.31=4.4-0.2=
6-0.4=7.8-3.2=0.74+0.11=8.9-0.2=
9+0.6=6.4-2.4=0.75-0.06=2.7+0.7=
7.9+0.6=7.6+1.1=0.84+0.35=6.2+0.3=
8.5-0.3=7.2+2.5=0.68+0.48=3+0.7=
4+0.3=8.6+3.2=0.6-0.02=3.2-0.5=
二、混合运算。
0.86+0.26+6.36.8-0.6-4.467.9-39.3+19.1
70.34-27.16+26.9678.9+32.47+19.589.05+1.66-4.64
40-(3.45+0.2)97.8-(29.1+6.9)7.27-4.66-1.13
一、口算。
6.9-0.2=7.4-4.6=0.67-0.03=4.5+0.2=
3.3-0.4=8.2+4.1=0.68+0.2=6.6-0.7=
2.9+0.8=8.5-0.9=0.63-0.13=4.7+0.5=
8.4+0.5=7.9-4.9=0.82+0.29=1.3+0.9=
2.6+0.6=8.3-3.4=0.62-0.18=1.6+0.7=
7.8+0.6=7.7-4.5=0.68-0.28=4.4+0.3=
5.7-0.9=8.2+0.8=0.67+0.17=5.9+0.4=
1.5+0.6=8+1.9=0.7-0.27=9-0.8=
二、混合运算。
0.62-0.08+7.55.3-0.15-1.8559.6+17.9+37
66.46-27.14+31.4167.84+36.16+31.439.08-3.66+4.25
70-(9.44+0.56)86.5-(15.7+2.8)7.06-5.44-1.08
一、口算。
5.8-0.9=8.3-4.5=0.87+0.38=5.9+0.7=
5.7-0.9=7.5-1.1=0.84+0.23=8.9-0.2=
5.6+0.3=8.1+0.2=0.65-0.07=6.6+0.9=
7.9+0.8=8.2-4.6=0.74+0.05=7.3-0.6=
3+0.8=8.9-4.9=0.66-0.35=2-0.7=
6.2+0.6=9-3.5=0.61-0.38=1.1+0.1=
3.8+0.8=6.5-1.4=0.72-0.14=3-0.5=
5.1+0.6=8.1-0.5=0.82+0.26=3.9+0.9=
二、混合运算。
0.83+0.05+1.26.4-0.61-4.3960.4+17.1+22.7
72.49+10.96+90.165.61-23.14+72.98.45-3.42-1.67
40-(8.61+0.35)93.9-(28.3-4.1)8.18+4.91+2.82
一、口算。
2.9+0.1=7.3-4.7=0.73+0.33=1.8-0.3=
7.3+0.7=7.9-0.3=0.71-0.44=8.8+0.4=
7.3+0.3=8.2+3=0.9+0.39=6.4-0.5=
3.9-0.5=7.8+1.7=0.66+0.21=3.6+0.5=
8.7-0.3=8.3+3.2=0.75-0.47=1.4+0.1=
4.2-0.5=7.9+0.2=0.88+0.27=7.1+0.4=
4.1+0.5=6.1+4.5=0.64-0.26=3.8-0.1=
5.2+0.7=7.8-1.1=0.83+0.14=4.7+0.3=
二、混合运算。
0.76-0.16+8.98.8-0.29-3.7194.9-35.1-54.7
75.73+35.25+32.1674.51-16.54+40.174.73+2.44-1.05
60-(9.53-0.61)75.5+(20.9-8.5)7.72-1.67+4.81
一、口算。
2.5+0.3=8.8+0.5=0.74+0.07=2.4+0.6=
1.5-0.6=7+4.1=0.77+0.31=6.5-0.2=
3.4-0.8=7.7-0.2=0.9-0.04=1.4+0.1=
2.2+0.9=7.7+2.3=0.77+0.06=4.9+0.5=
1.1+0.8=7.5-1.8=0.9-0.19=8.5-0.6=
3.9-0.7=8.7+4.6=0.64-0.23=8.7+0.7=
8.8+0.9=6.4-2.8=0.67-0.02=8.1-0.2=
3.8+0.9=7.8-3.1=0.85-0.24=7.9-0.3=
二、混合运算。
0.78+0.21+7.69.6-0.16-1.8437.3+14.4+21.7
84.44+24.02+15.9189.5-32.61+78.578.74+1.27+4.91
70-(1.89+0.38)93.7+(27.3-3.2)5.26+1.42-3.69
一、口算。
5.7+0.2=6.8-2.2=0.67+0.15=7.7-0.6=
6-0.3=7.3+0.6=0.9-0.12=5.2-0.3=
3.6-0.3=8.6-0.6=0.61-0.42=2.7-0.4=
5.6-0.9=8.2-3.1=0.71+0.32=5.7+0.1=
6.4+0.9=6.3-2.2=0.88-0.35=4.7+0.8=
8.8-0.4=6.8-3.6=0.65-0.21=6-0.7=
5.3+0.2=8.6+1.6=0.66+0.31=5+0.7=
8.3-0.2=6.5-3=0.78-0.05=6.6+0.8=
二、混合运算。
0.73-0.06+26.5-0.74-3.2666.6+28.7+36
65+16.71+87.4273.29-24.91+69.467.26+5.27+1.68
20-(2.94+0.7)90.4+(17.1+3)5.82+2.97+1.05
一、口算。
3.9+0.3=6.1+3.5=0.67-0.04=5.6+0.3=
6.1+0.7=6.5+3.5=0.89+0.07=5.2-0.6=
3.7+0.7=8.8+4.7=0.76+0.25=6.4+0.1=
8.2-0.9=8.6-2.2=0.85-0.14=4.1-0.7=
3.3-0.5=6+2.1=0.65+0.35=5.5-0.8=
4.5+0.6=7-1.5=0.74+0.11=4.8+0.9=
4.7-0.4=7.3+0.6=0.61-0.47=5.1-0.7=
2.1+0.3=8.3+4.5=0.74+0.31=6.4-0.8=
二、混合运算。
0.66-0.09+9.37.9-0.14-4.8659.3-29.7-26.2
82.82-14.76+78.3785.37-37.16+32.597.78-6.08+1.3
70-(8.37-0.42)92.2-(21.9-1.2)7.18-1.31+3.2
一、口算。
8.3-0.7=8.5-0.4=0.64+0.48=5.1+0.9=
6.3-0.8=8.1+4.2=0.63+0.32=2.6-0.7=
1.6+0.7=7.9+4.6=0.79-0.39=2.9-0.9=
7.8-0.5=7.8+4=0.69-0.35=5.8+0.4=
8.8-0.7=8.6-0.1=0.78-0.16=4+0.6=
3-0.4=7-4.9=0.66-0.26=5.1+0.4=
4.6-0.4=6.6-3.5=0.66-0.2=7.9-0.8=
2.1+0.8=7.1+3.8=0.6-0.13=8.8-0.9=
二、混合运算。
0.78-0.2+0.97-0.72-0.2880.3+14.9-35.3
67.05-14.47+91.8774.13-46.64+85.166.15-1.35-1.3
80-(8.05+0.53)60.8-(24.3-3.7)7.01-4.19-2.75
一、口算。
3.4-0.4=6.9-3.2=0.88+0.19=9+0.6=
3.1+0.4=7.9-0.3=0.65-0.22=6+0.4=
3.9+0.6=8-0.9=0.66+0.4=5.7-0.5=
8.9+0.8=6.8+0.2=0.83+0.29=4.6-0.4=
2+0.8=6.6+1=0.62-0.41=4.7+0.1=
1.7+0.3=6.9-1.9=0.68+0.47=1.5-0.3=
1.7+0.9=8.7+4.8=0.85+0.25=2.3-0.6=
4.6+0.2=6.2+1=0.69-0.47=1+0.1=
二、混合运算。
0.76-0.45+75.3-0.14-4.8657.1-15.1+34.6
77.56-32.99+42.8987.23-32.98+43.97.61+3.04+4.47
50-(2.76-0.65)87.9+(12.1-5.8)8.22-5.28-1.99
一、口算。
1.5-0.8=7.7-4.6=0.86+0.27=2+0.6=
5.3-0.6=8+0.7=0.83-0.41=4.6+0.8=
6.1+0.2=6.3+0.7=0.88+0.34=8.9-0.6=
2.5-0.9=6.2-2.9=0.62-0.12=4.8+0.6=
2.6-0.5=9-1.3=0.67+0.25=8.2-0.5=
1.8+0.3=6+4.2=0.61-0.47=4.7+0.8=
1.2-0.9=8.8+4.8=0.89-0.02=5.7+0.9=
5.9+0.6=6.1-0.8=0.69+0.13=8-0.8=
二、混合运算。
0.84-0.44+8.46.7-0.66-0.3437.7-18.7+17.6
66.25-46.58+20.6965.22+37.62+63.167.42+2.94+3.14
20-(6.04+0.85)81.1-(13.5-1.1)6.98+4.88-1.81
一、口算。
2.1+0.5=8.7+3.6=0.78-0.2=3-0.5=
6.3+0.7=8.6+3=0.64-0.23=3.4-0.4=
6.1+0.5=7.8-4=0.67+0.05=4+0.2=
6.4+0.4=8.4-1.2=0.7+0.37=8.6+0.8=
8+0.8=6.7-1.3=0.86-0.48=7.1+0.9=
6.4+0.2=8.4-2.4=0.87-0.09=3.2+0.9=
1.6+0.3=7.7+4.5=0.88-0.25=5.4+0.6=
2+0.8=6.1-1=0.78-0.26=6.6-0.6=
二、混合运算。
0.72-0.08+6.57.6-0.71-3.2969.4-32+22.6
63.6-47.29+85.3470.27-31.97+87.748.89-1.22-5.47
60-(7.06-0.5)95.7+(21.8-2.6)7.05-4.25+1.62
一、口算。
5.9+0.2=6.5+0.2=0.87-0.33=2.4-0.6=
4.5-0.4=6.4-2.6=0.79-0.19=5.7+0.1=
7.4-0.7=9+3.3=0.72+0.09=1.9+0.9=
8.3-0.3=8.8+2.1=0.6+0.47=8-0.1=
3.8+0.2=9+1.4=0.79-0.27=2.3-0.7=
6+0.4=9-2.8=0.7+0.33=4.3+0.1=
5.3+0.1=6.5-2.4=0.75-0.23=2.8-0.4=
6.4+0.8=8.5+2.5=0.61-0.08=7.1-0.4=
二、混合运算。
0.8-0.49+7.49.2-0.67-4.3363.1+17.8+32.4
76.94+33.01+30.3475.15-40.02+91.178.84+4.94-3.32
80-(4.63-0.27)82.6+(21.1-1)5.39-1.88+2.97
一、口算。
8.8-0.7=8.3+4.4=0.76+0.13=4.4+0.5=
7.4-0.8=7.9-0.5=0.74-0.19=8.3-0.4=
6.8+0.2=6.7+2.2=0.7-0.45=2.2-0.3=
5.2+0.7=8.9+4.4=0.65-0.29=7.2-0.6=
8.8+0.6=6.3-3.6=0.7-0.13=3.6+0.7=
7.1+0.3=9-0.1=0.79+0.27=4.1-0.6=
7.7-0.2=7.8+3=0.73+0.13=1.7+0.7=
6.9+0.4=8.8+1=0.78+0.12=3.9+0.9=
二、混合运算。
0.69-0.18+3.65.7-0.68-2.3290.3-63.7+18.5
71.95+18.58+18.7279.28+30.88+87.023.76+1.31+1.67
30-(4.74-0.58)70.1+(14.1+7.5)3.62-1.74-1.34
一、口算。
8.2+0.6=7.8-4.4=0.66-0.23=6.5+0.1=
3.5-0.5=6.5-0.5=0.69+0.05=3.9+0.4=
2+0.2=6.8+4.8=0.83+0.16=7.4-0.1=
7.2-0.7=8.3+2.5=0.67+0.39=8.7+0.1=
5.4+0.4=8.7+2.4=0.77+0.07=2.8+0.6=
1.1-0.7=7.4-4.4=0.71-0.31=1.9+0.5=
8.1-0.5=8.3+3.9=0.88-0.04=3+0.8=
2.9+0.5=8.3-2.4=0.89-0.28=1.1-0.1=
二、混合运算。
0.75-0.09+9.58.4-0.22-2.7894.9+22+72.1
89.26+27.4+65.4179.94-25.99+15.489.07-5.6+3.3
20-(8.15+0.46)66.8-(26.7-6.2)5.15-2.4-2.57
一、口算。
5+0.5=7-4.5=0.74-0.43=2.1+0.3=
2.7+0.6=7.2-0.1=0.85+0.1=3-0.3=
3.2-0.4=8.7-
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