人教版四年级数学下册小数加减法混合运算专项练习题98.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98
一、口算。
3.1-0.6=7.4-4.6=0.78-0.4=9-0.2=
3.9-0.3=8.9+4.8=0.88-0.08=7-0.7=
5.1-0.1=6.1-1.2=0.69-0.23=4.8+0.7=
1+0.1=6-3.1=0.81-0.17=4.6+0.6=
4.7-0.9=8.7+2.1=0.87+0.33=8.1+0.2=
2-0.7=7.8-1.4=0.75-0.34=4.5+0.2=
1.2-0.2=7.8+2.9=0.62-0.41=7.6-0.8=
2.2+0.1=7.5-1.7=0.89+0.37=8.7-0.2=
二、混合运算。
0.78-0.32+6.27.3-0.39-1.6181.6-51.6-11.3
77.53-37.93+95.6574.42-29.43+47.785.07-2.71+2.23
90-(2.51-0.79)66.3+(26.7+4)8.58-2.61+4.05
一、口算。
8+0.6=6.6-0.8=0.79-0.12=4.7-0.7=
3.5+0.8=7.2-1=0.62+0.48=4.5+0.3=
7.7-0.9=7.6-2.7=0.89+0.42=4.2-0.1=
1.2-0.8=8-0.7=0.88-0.31=1.7-0.4=
7.8+0.7=8.6-0.4=0.72-0.09=6.3+0.4=
5.7+0.4=6.8-4.9=0.78+0.1=3+0.7=
5.6+0.2=7.2-3.4=0.74+0.45=7+0.5=
1.6-0.3=7.1+1.3=0.77+0.12=7-0.3=
二、混合运算。
0.6-0.42+4.15.1-0.34-3.6665.3+22.5-35.2
87.75-20.58+90.6476.77-21.73+18.024.09-1+1.59
20-(2.16-0.79)62.4+(28.6-7.7)3.81+1.25+1.46
一、口算。
2.4-0.1=7.4+1.4=0.66-0.25=3+0.3=
2.2+0.6=6.9-0.6=0.83+0.37=3.6-0.7=
1.4-0.2=8.6+2.5=0.65-0.42=6.4-0.9=
4.5+0.9=8.9-0.3=0.65-0.32=4.3-0.7=
4.3-0.7=8-1.8=0.85+0.37=3.9+0.3=
7.9+0.5=8.8-3.3=0.64-0.37=2.6+0.7=
8.8-0.6=8.9+0.5=0.87+0.01=2.7-0.9=
2.1-0.3=6.4-0.7=0.62-0.11=8.4-0.1=
二、混合运算。
0.68-0.05+7.67.4-0.86-0.1449.9+20.9+18
87.12-19.41+68.7860.05-39.17+50.398.19+2.42-4.09
50-(1.56-0.92)61.2+(19.8-9.5)6.4-4.86+1.4
一、口算。
7.1+0.5=8.7-4.4=0.82+0.48=3.2-0.4=
5.8+0.5=8.7-4.6=0.8-0.17=8.4+0.3=
2.1+0.5=6.4-3.8=0.86-0.41=5.6+0.2=
4.8-0.5=7.9+0.6=0.63+0.03=7.5+0.3=
6.1+0.7=7.4+1.5=0.75+0.26=1+0.1=
7.1+0.7=7.2-3.1=0.72+0.49=4.8+0.1=
1.7-0.9=7.2+0.4=0.86-0.07=8+0.1=
6.1+0.7=6.4+0.1=0.65-0.27=6.6-0.8=
二、混合运算。
0.81-0.06+4.49.9-0.61-2.3955.9-22.1-16.6
76.03+48.54+23.278.74+17.12+93.998.59+6.99+1.42
70-(3.27-0.93)68.1+(21.1+6.8)4.01+2+1.51
一、口算。
2.9+0.9=6.2-1.9=0.72+0.42=4.6-0.8=
2.6+0.5=7.2-0.7=0.77+0.04=1.9+0.6=
2.3+0.5=6.2-0.6=0.73+0.48=8.5+0.6=
3.2+0.3=6.9+3.6=0.86-0.36=1.6-0.2=
8.5+0.8=8.8-3.8=0.84-0.15=1.6+0.8=
6.5-0.6=8.3-2.1=0.82+0.49=1.2+0.3=
3.5-0.6=9+4.3=0.71+0.3=2.4+0.1=
7-0.2=7.4-2.8=0.77+0.47=8+0.1=
二、混合运算。
0.78+0.15+5.55.9-0.66-0.3454.7+12.6-31.9
80.57+16.94+20.5675.31-38.02+97.875.64-1.83+2.32
40-(3.21-0.87)73.9+(11.1+3.1)5.78+2.59-1.2
一、口算。
2+0.8=6.9-2.9=0.8-0.15=6.5-0.3=
5.4+0.8=7+2.3=0.8+0.11=4.9+0.1=
4.8+0.7=8.3-2.1=0.79+0.45=8.5+0.6=
1.6-0.4=9-2.7=0.64+0.17=2.7-0.6=
5.4-0.8=7.6-0.3=0.75-0.28=2.3+0.2=
8.3+0.8=6.1+2.6=0.6+0.13=5.2+0.7=
3.7+0.1=7-0.7=0.86+0.3=1.7-0.6=
4+0.3=8.3+1.1=0.65+0.03=2.5-0.8=
二、混合运算。
0.81+0.25+6.16.7-0.52-0.4845.5-23.1+13.8
60.4-11.08+69.588.06-34.38+51.17.67-2.59-3.37
30-(7.9-0.39)90.8+(17.9+7)4.69-1.01-2.95
一、口算。
4.6+0.2=7.9-4=0.62-0.21=4.9-0.7=
3.3-0.2=7.7+0.2=0.63+0.04=1.2-0.2=
7-0.5=6.3+3.2=0.68-0.06=2.9+0.8=
3+0.6=8.2+1.7=0.65+0.11=5.4-0.4=
3.6-0.4=7.9-0.3=0.85-0.32=3.2-0.4=
2.1+0.3=6-1=0.71+0.49=8.5+0.9=
1.5-0.7=8.1-3.7=0.7-0.13=5+0.3=
4.6+0.9=9+4.4=0.69+0.27=7.7-0.1=
二、混合运算。
0.71+0.01+9.57.1-0.89-0.1147+17.1-21.3
62.66-39.76+67.7769.47+34.23+36.629.4-1.81-2.07
50-(3.66-0.76)90.1-(23.2+2.8)8.95+3.45+1.83
一、口算。
2.4-0.9=8.4+1.2=0.86-0.17=3.8+0.5=
2.9-0.2=7.3+1.7=0.63+0.41=7.5+0.6=
3.4+0.9=7.1-3.2=0.65+0.24=2.3+0.9=
4.7+0.7=7.2-2.7=0.78+0.08=3.3+0.2=
7.2+0.1=9-1=0.84+0.18=1.5+0.8=
5.3-0.3=6.5+2.1=0.73+0.31=6.3-0.3=
2.3-0.2=6.4-1.9=0.82-0.11=3+0.8=
3.6-0.7=6.7-1=0.7-0.11=5.6+0.3=
二、混合运算。
0.84-0.47+38.5-0.81-3.1982.7+32.2+34.2
77.77+20.25+39.5465.06-38.61+88.317.66+1.77+3.65
60-(7.79-0.4)67.9-(13+8)6.05-1.7-1.06
一、口算。
4.2-0.2=6.3+4.6=0.84-0.27=6.4-0.7=
3+0.8=8.6+3.2=0.67-0.01=7.3-0.3=
3.4-0.5=8.4+3.6=0.82+0.3=4-0.6=
7.6+0.5=6.4+4.2=0.67-0.46=7.3-0.2=
5.5+0.6=7.5-0.4=0.72+0.07=4.5-0.2=
5.5-0.7=7.4-1.9=0.85+0.08=4+0.8=
8.7+0.4=7.4-4.4=0.9+0.09=4.7-0.1=
7.2+0.6=6.4+4.2=0.6+0.26=2+0.7=
二、混合运算。
0.67+0.33+0.27.3-0.11-3.8998.8-46-18.9
62.85-19.09+49.7860.15+20.44+47.553.85-2.34+1.34
80-(1.38-0.72)73.9-(12.7+9)6.63+1.75+1.87
一、口算。
6.3+0.1=6.8-1=0.65+0.33=5.5-0.6=
2.1-0.3=6.5+2.8=0.65-0.26=2.3-0.1=
4.8+0.5=6.1+4.5=0.79-0.36=1.7-0.9=
6.2+0.5=6.4+3.7=0.68+0.48=5.8+0.2=
7.1-0.3=7.3-2.6=0.84-0.18=6.2-0.2=
2.5-0.2=7.5-3=0.74+0.35=2.1+0.5=
4+0.9=8.7+0.4=0.75-0.36=6.2+0.8=
2.7-0.8=6.5-4.9=0.82-0.01=3.4-0.1=
二、混合运算。
0.67-0.49+7.98.9-0.3-0.756+35.5+15.5
76.23+13.29+41.5162.22-40.58+10.654.17+1.32-1.85
80-(1.26+0.91)98.6-(24.7+6.7)3.95+2.16+1.31
一、口算。
8.7+0.8=6.8-1.9=0.73+0.21=3.8+0.5=
6-0.6=7-2.7=0.62-0.32=7.4+0.5=
3.3+0.8=6+3.7=0.89-0.41=6.3+0.9=
1.2-0.1=8.4-1.5=0.63+0.18=1.8-0.3=
5.5+0.3=7.5+0.5=0.82+0.26=1.6+0.8=
3.9+0.1=7.9-1.8=0.81-0.16=8.8-0.4=
4.4-0.1=7.9-0.3=0.75+0.02=4.8+0.6=
2-0.4=9+1.5=0.67-0.17=8.7-0.1=
二、混合运算。
0.68+0.42+5.77-0.67-4.3396.7+29.8+36.9
88.49+43.26+84.1571.48+45.28+93.819.06-3.78+3.09
60-(5.35-0.98)97.1-(27+6.4)9.65-6.85+1.56
一、口算。
2.1+0.8=7.1-3.7=0.71-0.49=5.9+0.1=
6+0.6=9+0.1=0.64+0.49=1.4-0.2=
7.2+0.6=8-2.1=0.62+0.12=3.9-0.6=
3.8+0.8=8.6+1.3=0.71+0.22=4.8-0.5=
6-0.2=6+1.4=0.63+0.37=3.5+0.8=
1.1-0.7=6.1+1.2=0.63+0.4=7.9-0.6=
3+0.4=8.6+3.6=0.77+0.06=2.3+0.4=
4.8-0.2=7.4+3.7=0.62-0.17=1.7+0.5=
二、混合运算。
0.71-0.19+4.28.7-0.11-3.8962.3-23.1+18.8
88.13-32.17+53.5973.76-42.8+32.066.94-1.96+2.59
60-(2.22+0.54)85.5+(22.7-5.2)3.8+2.05-1.03
一、口算。
5+0.3=8.7-4.5=0.89-0.11=5.8-0.7=
5+0.6=8.5+4.1=0.76-0.37=3.6+0.5=
5.6+0.7=9-4.8=0.71+0.36=4.1+0.4=
8.7-0.7=7-4.6=0.73+0.01=5-0.4=
8.5-0.7=7.5-2.4=0.75-0.09=4.4-0.1=
7.5-0.8=6.1-3.5=0.87+0.26=5-0.6=
3-0.6=7.7-1.5=0.9-0.35=2.5+0.1=
5.4+0.8=6.5+3.5=0.64+0.34=7.2-0.4=
二、混合运算。
0.82-0.03+5.48.4-0.26-0.7486.7-40.8+20.9
86.41-14.71+27.7483.14+18.89+42.516.71+3.7-1.65
70-(8.66+0.34)76.5+(18.6+5.1)4.58+2.68+1.09
一、口算。
3.4+0.3=8.6+0.6=0.8-0.42=4.7-0.2=
8.2+0.8=8.9-3.5=0.67+0.35=5.7-0.9=
8.2+0.9=7.2+2.7=0.73-0.43=2.7+0.4=
8+0.9=6.2+0.1=0.69+0.39=8.9-0.1=
8.8-0.8=7.8-1.7=0.6-0.16=5.6-0.5=
7.4-0.3=7.7-2.7=0.61-0.18=4.4+0.6=
1.5+0.5=9-0.2=0.88+0.31=5.8+0.3=
4.6+0.6=7.5+1.2=0.9-0.03=4.9+0.8=
二、混合运算。
0.66-0.23+6.57.6-0.25-3.7555.6+31.3+14.2
85.25+23.4+94.0566.04+17.74+49.314.55+2.78+1.06
90-(8.75-0.94)80.8-(29.2+9.3)4.05-1.2-2.21
一、口算。
6.4-0.1=7.1-0.2=0.81-0.1=7.7+0.2=
8.3-0.8=7+1.5=0.85+0.3=2.3+0.8=
1.4+0.3=7.6+0.7=0.88+0.19=2.7-0.2=
3.6+0.6=8.1-0.9=0.75-0.32=4.3-0.8=
4.4+0.1=9-2.5=0.87+0.2=1.6+0.5=
6+0.4=6+3.9=0.65+0.21=6.7-0.4=
5-0.7=8.2+0.8=0.83+0.35=8.8-0.4=
6.9-0.3=8.8+2.3=0.61+0.43=5.7+0.5=
二、混合运算。
0.71-0.43+0.35.8-0.6-3.488.2+29.1-28.7
73.34+27.21+46.7382.04+12.62+34.497.04-2+3.95
30-(9.43-0.98)68+(22.6-4.4)6.03-1.89+1.92
一、口算。
6.7-0.8=6.1+3.7=0.77+0.18=6.7-0.3=
2.2-0.5=6.5+3.8=0.69+0.39=4.1-0.8=
1.6-0.4=7.9-4.1=0.83-0.3=6.1+0.4=
7.7+0.3=7.7-2.5=0.86-0.02=7-0.2=
2.4+0.3=7.9+1=0.9-0.42=1.8-0.3=
5.1-0.4=6-0.2=0.69-0.25=1.1+0.2=
8+0.1=7.7+2.6=0.7+0.45=4.3-0.7=
8.6+0.3=7.8-1.5=0.85+0.08=6.2+0.6=
二、混合运算。
0.79+0.02+6.99.1-0.15-4.8550.3-26.4-13.2
67.59-47.32+25.4170.84-23.4+69.589.47-5.15+1.89
60-(1.67+0.37)64.7-(14.5-4.9)6.93-3.85+1.21
一、口算。
6.5-0.7=7+2.4=0.69-0.11=1.9-0.3=
6.2+0.2=7.4-4=0.74+0.41=2-0.4=
6.7+0.3=8.7-0.7=0.9+0.38=7.6-0.9=
7.9-0.2=8.3+1.8=0.86+0.43=1.6-0.5=
7.5-0.8=8.3+3.9=0.74+0.21=5.3+0.5=
3.5-0.1=8.1+2.1=0.63-0.45=8.1+0.2=
1.4+0.8=6.7+0.3=0.78+0.12=3.6-0.8=
8.6-0.4=6.5+3.3=0.66-0.14=2.6-0.3=
二、混合运算。
0.87-0.12+0.27.1-0.74-1.2649-20.9-24.8
75.89+20.03+70.8381.19-37.36+46.554.26-1.07+1.37
30-(6.99-0.33)87.9-(23.4-2.5)7.75+4.29+2.5
一、口算。
7.8-0.9=6.7-3.1=0.67-0.48=1.9-0.9=
3.5-0.5=9-3=0.61-0.32=8.4-0.8=
3.4+0.9=7-1.5=0.71+0.33=1.8+0.8=
8.8-0.1=