人教版四年级数学下册小数加减法混合运算专项练习题85.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85.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85
一、口算。
8.6+0.7=7+4.6=0.67-0.11=7.6+0.9=
7.3-0.4=8.1+4.5=0.75+0.01=2.9+0.5=
2.6-0.6=8.7+1.8=0.65+0.15=6.6-0.1=
2.9-0.5=7.6+1.5=0.89-0.13=5.2+0.2=
2.4-0.8=6.4-1.1=0.72+0.19=5.5-0.6=
8.4-0.7=8.8+3.5=0.85+0.38=3.7+0.2=
3.1-0.1=7.8+1.4=0.65-0.49=5.6+0.8=
6.1+0.3=7.7-1.7=0.71+0.09=1.8-0.1=
二、混合运算。
0.62+0.35+2.37.8-0.4-4.656.7-25.8+24.5
65.01-37.3+85.7660.48+18.01+98.969.4-3.41+1.32
50-(5.7-0.56)71.3+(11.4+6.8)7.01-1.31+1.74
一、口算。
4.4-0.2=8.2-4.1=0.68+0.1=5.4+0.8=
5.3-0.9=6.5-1.7=0.73+0.48=2.4+0.2=
1.6+0.6=8.5-4.1=0.82-0.17=2.5-0.5=
8.2-0.8=7.8-2.6=0.74-0.37=5.6-0.5=
1.2+0.7=8-3.5=0.77-0.36=6.4-0.5=
3.7-0.7=7.2-2.4=0.75-0.13=9+0.1=
8.5-0.3=6.7-1.6=0.7+0.18=5.9-0.9=
7.6-0.1=7.7+4.1=0.65-0.26=1.2-0.3=
二、混合运算。
0.79-0.35+67.6-0.14-2.8678.3-56.1-14.4
85.08-39.94+51.2577.96+32.09+84.968.45-1.32-4.16
80-(3.89+0.35)94.9+(14.9+7)7.65-4.32-2.76
一、口算。
8.4+0.8=6.6-0.1=0.8+0.48=3.7-0.8=
8.4-0.1=8.9-1.1=0.84-0.48=8.2+0.9=
7.3+0.5=7.7+2.8=0.82+0.47=7-0.8=
7.7-0.1=7.2+3=0.74+0.21=5.4-0.9=
4.1-0.3=6.9-3.8=0.67+0.44=4.5+0.4=
8.1+0.3=7.8-3.2=0.87-0.45=6.9+0.1=
6.7+0.6=6.6-0.6=0.67-0.07=2.2-0.4=
2.9+0.8=7.7-4.2=0.6-0.25=4.2+0.1=
二、混合运算。
0.67-0.46+0.96.2-0.32-3.6879.3+26.4+27
64.06+35.38+47.0270.07-40.41+36.734.77-2.8-1.62
40-(1.27-0.73)77.4-(13.9-8.5)4.85+1.93-1.76
一、口算。
2.6-0.1=8.7+2.7=0.62+0.31=8.8+0.8=
7.2+0.3=6.4+0.2=0.82+0.49=6+0.7=
7.7-0.7=7.9+4=0.89+0.31=3.2-0.2=
5.1-0.1=8.1+4.9=0.9+0.27=7.2-0.5=
7.8+0.8=7.4-4.9=0.67+0.19=1+0.1=
1.3+0.3=7.8-0.5=0.72+0.49=1+0.2=
8+0.5=8.6+4.2=0.62-0.12=4.2+0.4=
7.3+0.5=7.1-2.9=0.84+0.1=8.9-0.8=
二、混合运算。
0.88-0.01+3.99.5-0.28-2.7258.3+36.8+21.3
66.76-46.4+73.7489.76+25.66+13.668.87-2.31-1.98
30-(9.37+0.87)66.7-(29.4-2.8)6.91+1.11+5.65
一、口算。
6.6-0.6=7.3-2.5=0.7-0.21=6.5-0.5=
3.8+0.1=6.1-4.4=0.84-0.4=8.1+0.3=
2.3-0.2=8.7-0.7=0.83-0.11=4+0.5=
3.9-0.6=7.2+0.2=0.61-0.46=1.6-0.2=
4.3-0.7=6.4+1.8=0.89-0.2=7.1-0.5=
8.3-0.8=6.8+3.2=0.84+0.03=6.5-0.2=
8.7-0.6=9+3.6=0.61-0.32=3.7-0.4=
7.3+0.2=6.6+3.1=0.83-0.3=5.2-0.4=
二、混合运算。
0.67-0.05+2.25.6-0.54-3.4675.4+54-17.7
80.29-41.29+33.987.27-39.17+64.487.74-3.86+3.02
30-(1.59-0.87)86.2+(23.7-7.1)7.67+2.09+2.52
一、口算。
2.4+0.4=9-3.4=0.83-0.18=7.7-0.7=
6.9-0.7=7-4.5=0.73-0.46=4.1+0.3=
3+0.5=7+2.4=0.79+0.15=5.4+0.4=
5.4+0.5=7.4-2.2=0.78-0.13=8.9-0.1=
1.4+0.5=6.3+1.8=0.66-0.13=1.4-0.7=
2.1-0.4=6.8-3=0.84+0.05=5.5-0.4=
5.4-0.6=6.7-3.3=0.7+0.34=5.9+0.9=
7.2+0.4=6.1-2.9=0.86-0.1=3.3-0.4=
二、混合运算。
0.88+0.22+2.97.6-0.68-2.3248.4-26.1-16.4
77.12+37.87+89.1567.27+12.1+70.137.31-1.68-2.14
30-(9.06-0.55)72.9-(15.1-1)4.8-3.25-1.45
一、口算。
8.7+0.5=7.1+0.7=0.84-0.26=5.4+0.3=
4.2-0.2=7.8-0.9=0.8+0.12=2.4-0.2=
4.9+0.5=6-3.3=0.73+0.08=8.9-0.6=
8.3-0.5=8.6+1.4=0.87+0.13=7.4-0.5=
7-0.9=7.3-0.7=0.76-0.22=1.7-0.8=
4.1+0.6=8.6+3.7=0.8-0.47=2.4-0.2=
6.3+0.1=6.6+1.7=0.82-0.13=3.9+0.6=
6.5+0.2=7.4+0.6=0.77-0.41=1.5+0.8=
二、混合运算。
0.87+0.32+7.48.6-0.8-1.240-12+11.8
86.11+16.56+63.8876.74-21.24+95.495.76+2.78+1.48
80-(2.24-0.25)62.2-(18.6-1.3)9.42+4.19+3.92
一、口算。
3.7+0.7=6.7-0.3=0.69+0.03=3.9+0.4=
5.6-0.2=8.5+1.2=0.74-0.12=1.6-0.9=
5.3+0.5=6.5-2.9=0.79+0.1=3.1+0.5=
8.6-0.9=8-0.7=0.68+0.36=3.8-0.7=
6.2-0.9=6.8-1.3=0.83+0.41=2.8+0.3=
7.5+0.1=6.3-3.8=0.6-0.43=4.8+0.6=
5.1-0.2=7.2-4.8=0.67+0.46=6.4+0.2=
8.8+0.3=6.9+2.5=0.73-0.15=3.8-0.3=
二、混合运算。
0.83+0.31+2.99-0.41-2.5994.5+33.8+46.8
84.95+37.47+22.6476.68+32.54+58.126.8-4.75-1.44
20-(5.39+0.12)80.5-(29.1-8.6)8.58-3.1+2.62
一、口算。
1.4+0.3=8.7-4.6=0.63+0.41=5.7+0.3=
8.5+0.9=8.9-3.4=0.74-0.05=8-0.8=
1.1+0.4=7.8-2.8=0.87+0.4=8.7-0.7=
8.3-0.5=6.4+2=0.65+0.12=8.9+0.7=
5-0.8=6.9-4.3=0.7+0.4=8.4+0.7=
6.4+0.1=9-0.5=0.68+0.1=7.9+0.6=
8.9-0.8=6.9+4.9=0.65+0.38=8.3-0.5=
1.7-0.9=7.4+4=0.74-0.26=3.4+0.7=
二、混合运算。
0.86-0.36+3.29-0.52-0.4854.5-33.5-18.1
60.74-21.04+60.879.79-16.91+64.237.49+5.87+1.21
70-(5.43-0.57)82.2-(10-7.5)6.97+4.12+2.79
一、口算。
2.6+0.9=7.7-0.5=0.79-0.39=2-0.3=
6.2-0.8=6.1-1.2=0.76-0.32=3.9+0.8=
3+0.2=6.4-4.2=0.67+0.01=8.2+0.9=
3.3+0.2=8.3-4.8=0.89-0.07=7.8-0.3=
8.9+0.3=8+4.7=0.6+0.3=8.3-0.5=
2.8+0.8=7.1-3.1=0.82+0.31=8.6+0.6=
2.9+0.2=6.2-2.4=0.75-0.05=1.5+0.5=
2.5-0.6=6.9-1.5=0.8-0.18=5.1+0.1=
二、混合运算。
0.71+0.37+1.69.8-0.45-1.5597.1-71.4+10.4
60.45-19.45+20.5474.52+23.41+27.937.11-1.71+3.49
30-(7.38-0.24)64.9-(11.2-9.7)5.57+2.31-1.08
一、口算。
7.8+0.3=6.1+1.9=0.66-0.33=1.9-0.4=
4.4+0.5=7.2-1=0.83+0.47=3.5-0.4=
7.6-0.9=6.6+4.8=0.63+0.32=6.3-0.2=
8.1+0.5=7-2.7=0.78+0.45=8.8-0.6=
1.7-0.3=6.6+3.6=0.64+0.09=7.4+0.6=
3.1+0.2=8.6+1.5=0.8-0.2=2.1+0.5=
5.8+0.4=7.7+2.5=0.61-0.22=2.3-0.2=
8.7-0.6=6.8-0.4=0.81+0.13=8.8-0.5=
二、混合运算。
0.72+0.24+8.16.9-0.36-1.6441.7+25.9-12
73.88+28.12+39.486.06+23.97+96.29.95+7.34-1.75
80-(8.04-0.6)98.2-(29.9+9.3)8.64-3.26+3.23
一、口算。
8.7-0.7=8.9-2.9=0.62-0.02=1.9-0.5=
1.5-0.8=8-3=0.87+0.26=4.5-0.4=
5.3-0.4=6.8+4.1=0.81+0.46=3.2-0.7=
5-0.1=6.6-0.2=0.62-0.39=4.1+0.6=
5.4-0.5=7.5+1.1=0.88+0.1=8.7+0.3=
8.9+0.9=6.4-4.9=0.89-0.15=2-0.5=
4.5-0.6=7.5+2.6=0.78-0.42=6.8+0.9=
1.6+0.2=7.7+2.3=0.76+0.15=2.6+0.1=
二、混合运算。
0.83+0.07+7.69.7-0.29-0.7176.1+59.2+15.5
82.35+33.42+90.4184.61-37.41+10.096.09+4.29+1.43
90-(3.98-0.39)69+(25+2)9.3+5.64+2.07
一、口算。
4.8+0.5=6-4.5=0.81+0.35=2.4+0.7=
6.2-0.5=6-1.6=0.82-0.47=2.4-0.4=
4.6+0.5=7.3-3.8=0.63-0.23=4.5-0.6=
8.8+0.6=8.6-3.8=0.85+0.47=5.8-0.2=
4.6-0.2=6.8+3.9=0.87+0.16=2.1+0.9=
8-0.7=7.9-0.7=0.65-0.17=8.9+0.8=
7.4+0.4=6.2-3.5=0.7+0.48=1.9+0.5=
1.6-0.8=6+1.5=0.74+0.21=6.4-0.1=
二、混合运算。
0.74-0.45+5.57.9-0.58-2.4259.7+40.3-18.9
62.7-46.79+85.9960.37+33.69+12.274.49+1.91-2.05
80-(2.57+0.37)89.2+(18.6-5.3)7.82-1.26-5.45
一、口算。
3.8+0.2=7+3=0.87+0.25=6.6+0.2=
5.1-0.7=8.2+1=0.66-0.03=3.5+0.5=
5.6-0.5=6.5+3=0.87-0.04=6.9+0.4=
7.9-0.4=7.3+2=0.65+0.17=2.7+0.9=
7.7-0.7=6.3-1.2=0.77-0.26=2.7-0.3=
2.3+0.8=6.5-0.4=0.74-0.04=4.3-0.1=
4.2-0.8=8.4+2.9=0.77+0.46=5.1-0.2=
5+0.8=6.1+3.4=0.66+0.47=4.2+0.3=
二、混合运算。
0.73+0.34+0.35.5-0.5-0.581.5-21.6-51
60.2+43.9+53.1782.7+33.08+31.098.14-3.59-4.12
20-(8.75-0.33)65.3+(10.7-7.4)8.96-6.56-1.84
一、口算。
7.4-0.2=7-1.1=0.79+0.15=4+0.6=
6.5+0.8=6.1+2=0.8+0.48=1-0.6=
3.9+0.7=8.8+0.1=0.81-0.01=6.8+0.1=
3.6+0.3=8.7-1.8=0.77+0.05=4.2+0.9=
8.9+0.6=8.8-2.1=0.64-0.09=5.7+0.3=
4.7+0.2=7.8+2.5=0.69+0.47=6.4-0.7=
4.8-0.1=7-0.5=0.75-0.14=2.1+0.1=
4.3+0.2=8.7-4.2=0.68-0.15=7.5+0.5=
二、混合运算。
0.79+0.08+36.8-0.74-0.2698.7+75-13.7
76.26+43.09+79.3169.87+39.3+45.568.92+1.87+5.79
80-(6.83-0.72)97.7-(21.8-9)9.01+2.88-1
一、口算。
5.2+0.7=7.5+1.5=0.88-0.28=7.7+0.4=
7.9+0.3=8+4.9=0.84+0.38=6.8-0.2=
8.9+0.1=6.2-0.7=0.67-0.13=6.9+0.6=
3.2+0.8=6.2+3.2=0.68+0.08=2.5+0.1=
5.8+0.4=8.2-2.1=0.81-0.41=1+0.5=
5.2+0.4=8.1+4.8=0.7+0.31=7+0.8=
4.6-0.3=7.3+3.8=0.72+0.46=4.1+0.1=
3-0.3=8.3-3.7=0.84-0.12=8.9-0.9=
二、混合运算。
0.9-0.28+9.59.7-0.84-2.1669-14.4+30.9
65.65-38.88+35.8387.59-30.54+74.54.15-1.2-2.18
90-(5.7-0.26)64.8+(24.1+9)6.6+1.35+4.52
一、口算。
4.9+0.9=9-4.6=0.85+0.19=3.2+0.9=
2.5+0.4=6.2+2.3=0.63+0.2=8.3-0.3=
7.5+0.1=8.7-0.6=0.62+0.39=8.1+0.8=
4.8-0.6=8.2+4=0.66-0.04=6-0.4=
1.5+0.6=8.4+4=0.84-0.12=2.6-0.7=
2.8-0.6=8+3.2=0.83-0.46=1.4-0.9=
2.4-0.7=6.2+2.9=0.72+0.36=1.8+0.1=
6.9-0.2=8.4-4.9=0.64-0.44=5.3+0.5=
二、混合运算。
0.73+0.35+1.58.6-0.43-2.5764.7-14.2-17.4
62.91+12.82+53.7577.24-15.96+81.959.51-3.92+5.12
30-(7.55+0.26)82+(23.7+6.2)4.2+2.1-1.67
一、口算。
9-0.7=8.1+4.5=0.76-0.33=6.5-0.6=
7.6+0.4=8.9-4.2=0.84+0.27=1.6+0.5=
8.2+0.4=8.5-2.7=0.82-0.34=8.8+0.2=
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