人教版四年级数学下册小数混合运算综合练习题51.docx
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人教版四年级数学下册小数混合运算综合练习题51
一、口算。
2.8+0.8=7.6-0.7=0.69-0.11=7.4+0.1=
8.8-0.3=6.2-4.8=0.64+0.22=2.3+0.6=
6.2+0.1=7-4.2=0.65+0.25=6.2+0.8=
2.3-0.9=8.4+0.9=0.87-0.25=4.2-0.9=
8.4-0.6=8.5-1.3=0.82+0.45=3.1+0.3=
4-0.7=9-2.6=0.71+0.05=6.2-0.3=
6.9+0.5=7.9-3.3=0.85-0.26=5.9-0.2=
8.5-0.6=6.8+3.1=0.66-0.04=6-0.9=
二、混合运算。
0.66+0.06+1.96.2-0.55-3.4570.5-17.4+25
64.4-45.59+84.5563.76+43.2+27.346.45+2.63-2.63
30-(8.37-0.12)98.8-(22.8-2.2)3.82-1.73+1.2
一、口算。
7.7-0.9=6.7-2=0.84+0.12=2+0.9=
5.5-0.9=8.1-4=0.71+0.32=4.9-0.8=
2.5+0.1=8.3-1.9=0.85+0.43=2.3+0.4=
2.7-0.8=7.1+0.7=0.85+0.42=8.7-0.3=
6.4-0.5=6.8+4.8=0.62-0.12=5.8-0.2=
8.4+0.2=8.5+2.1=0.89-0.22=2.9-0.1=
8.6+0.3=6.5+0.2=0.8-0.46=6.9-0.1=
5.4+0.4=7+0.3=0.89+0.24=3.7-0.5=
二、混合运算。
0.79+0.38+4.68.7-0.56-3.4462.8+36.9+11.5
69.9-48.47+63.165.02+16.6+50.135.25+3.45+1.31
60-(7.42-0.32)69.1+(26.5+6.7)4.47-1.02+1.11
一、口算。
3.1+0.8=6.6-0.6=0.71+0.22=1.3+0.4=
5.2+0.7=8.1+0.9=0.73+0.42=5-0.7=
3.4+0.4=8.9+2.1=0.82+0.32=6.7-0.4=
6.7-0.4=8.6+4.7=0.7+0.21=7.1+0.1=
2.5-0.4=8.3-4.9=0.85+0.4=4.9+0.7=
1.5-0.2=8.5-1.2=0.71-0.34=3.6+0.9=
3.5+0.6=7.5+1.7=0.81+0.07=7.2-0.6=
2.3-0.5=8.4+4.1=0.84+0.08=7.9+0.4=
二、混合运算。
0.84-0.05+8.86.9-0.32-0.6860.4+43.4+13.7
75.54+22.6+66.8971.38-18.33+74.75.84-4.24+1.34
40-(6.9+0.38)89-(20.3-9.3)9.49-6.36+1.66
一、口算。
7.6+0.4=6.4+0.4=0.65-0.28=4.7-0.8=
5.7+0.8=8.5-0.8=0.63+0.13=1.3-0.9=
8.1-0.5=8.1-4.1=0.68-0.32=4.9-0.7=
6.2+0.9=8.6+0.9=0.82+0.2=3.3+0.3=
7.1-0.3=8+1.9=0.66+0.05=3.9-0.9=
1.8+0.9=6.6+3.9=0.85+0.47=6.8-0.7=
3.7+0.8=7.4-4.9=0.85+0.49=8.9-0.2=
1.2-0.2=8.5+0.3=0.88-0.24=4.1-0.3=
二、混合运算。
0.67+0.3+7.48.7-0.75-1.2579.9-26.4-52.9
60.48-42.61+67.5873.31-37.5+44.687.11-2.25+1.18
60-(3.79+0.43)65.2-(27.1-5.5)3.56-2.04+1.39
一、口算。
6.7+0.8=7.8-4.9=0.72-0.38=2.1+0.7=
3.7+0.3=8.9+1=0.62-0.2=1.4-0.6=
7.5-0.9=7.2+2.3=0.88-0.48=7.8+0.4=
5.1+0.3=8.9-4.5=0.62+0.18=6.6-0.9=
6.1-0.3=8.1+3.3=0.82-0.4=3.4+0.3=
6.8-0.5=6.9+1.9=0.66+0.23=1.7+0.3=
4.3-0.2=7.2+1.9=0.87+0.24=6.1+0.8=
4.1-0.8=8.5-4.1=0.79+0.46=1+0.6=
二、混合运算。
0.7-0.39+4.99.6-0.3-1.783.6+44.4-15.7
89.59-32.26+74.177.38-14.23+35.927+1.1-1.39
90-(8.37+0.18)85.5-(27.9+9.4)7.34+3.97-2.31
一、口算。
5.1-0.3=8.9-2.3=0.87+0.2=7.5+0.2=
1.7+0.3=8.1+1.8=0.88-0.31=3.8-0.7=
2.6+0.2=6.5+1.2=0.79+0.38=3.5-0.8=
1.1-0.7=6.9-2.2=0.7+0.32=3-0.2=
3.7+0.4=7-4=0.88+0.37=4.7+0.3=
5.5+0.8=7.5-0.3=0.84-0.02=1.5-0.4=
3.9+0.7=7.8-0.3=0.86+0.24=1.7-0.5=
4.7+0.8=7.3-2.5=0.85-0.25=8.9+0.9=
二、混合运算。
0.84-0.09+4.47.2-0.36-3.6464.7+16.5+36
77.43+16.85+60.3382.08-10.75+75.229.21+2.37-6.77
20-(7.22+0.94)92.1-(11.7-4)7.21+5.29-1.52
一、口算。
5.3+0.5=7-3.2=0.86+0.03=5.4-0.1=
3.4-0.5=6-4.2=0.72+0.2=9+0.4=
3.2-0.9=8.1-0.3=0.88+0.33=2+0.9=
5.5-0.5=6.1-1.6=0.6+0.45=6.1-0.4=
5.9-0.1=8.4+3.4=0.64-0.36=4.8+0.4=
2.7-0.3=8.5+4.4=0.87+0.47=2.4-0.4=
8.9+0.1=6.6+3.8=0.66-0.05=4.8+0.4=
8.9-0.8=6.8+0.7=0.69-0.21=2-0.4=
二、混合运算。
0.76-0.12+9.68.4-0.75-4.2555.9-23.6+10.3
68.84-10.64+94.6768.19+15.63+53.964.93+3.31-1.26
40-(6.28-0.52)90.8+(14.6-3.6)5.51+2.91-1.42
一、口算。
2.8-0.5=6.3+4.2=0.69+0.39=4.4+0.5=
7.6+0.9=7.2+1.7=0.63+0.33=7+0.2=
6.1-0.3=8.9-1.3=0.6-0.26=3.4-0.6=
5.2-0.2=7.9-0.8=0.72+0.04=8.7+0.3=
5.7+0.4=8-1=0.64-0.04=7.3-0.3=
2.4+0.1=7.1-3.2=0.67-0.01=3.1+0.7=
5.3-0.3=7.3-0.7=0.7+0.45=4.9-0.5=
5.1-0.8=6.5+0.9=0.71+0.4=3.6-0.4=
二、混合运算。
0.8-0.36+28.5-0.48-1.5242.4+21.6+19.2
71.56+44.82+46.777.51-17.34+31.223.9-1.38-1.23
70-(3.14+0.21)75.9+(24.4-3.6)7.71-5.85-1.77
一、口算。
9-0.5=6.4+4=0.69+0.47=3.7-0.3=
8.3-0.1=8.4+2.2=0.75-0.23=8+0.9=
3.7-0.5=7.4-4=0.76-0.43=5.7+0.3=
4.1-0.8=8.8-3.8=0.6-0.25=4.6+0.5=
7.3+0.7=7.5+1.6=0.86-0.26=8.9+0.9=
3+0.4=8.5-4.7=0.73+0.23=7.1-0.8=
1.7+0.6=7.2+1=0.63+0.39=5.8-0.9=
7.4-0.1=8+4.9=0.75-0.37=6.1-0.6=
二、混合运算。
0.65+0.13+6.15-0.2-4.865.5-20.3-24
89.2-37.36+21.7584.56+26.16+83.75.21+1.39-2.81
80-(6.67+0.61)61.9+(27.2+2.2)5.49-2.35+2.74
一、口算。
3.1-0.2=6+4=0.84+0.44=7.4+0.4=
8.7+0.9=7.4-2.6=0.78+0.07=6.5-0.4=
1.2-0.1=6.8+3.8=0.68-0.44=4.8-0.4=
6.9-0.3=6.9+3.3=0.9-0.46=4.7+0.3=
8.6+0.2=7.6+4.2=0.86-0.11=4-0.2=
1.4+0.6=8.1-4.1=0.6-0.44=7.1-0.6=
7.5+0.6=8.2-3.7=0.7-0.46=4.9-0.2=
4.5-0.1=6.7+1.1=0.77+0.45=5.4-0.3=
二、混合运算。
0.67-0.4+3.15.1-0.74-2.2648.9+18.5-18.6
89.73-46.36+82.3761.27+44.64+67.998.39+3.48-3.06
90-(1.2-0.88)85.9+(20.9-2.5)3.79+1.56+1.61
一、口算。
6.1-0.7=7.3+3=0.87+0.23=4.8+0.4=
7+0.9=6.8+4.4=0.79-0.18=2.6-0.2=
8.3+0.7=7.7+1.1=0.87+0.29=1.2+0.4=
1.1-0.9=6.4-3.5=0.88+0.07=2.1+0.7=
8.7+0.2=7.1-4.3=0.6+0.35=4.9+0.6=
1.9-0.7=7.5+0.9=0.81+0.44=5.5-0.9=
2.9-0.1=6.2-1.5=0.7-0.17=8.6+0.7=
8.8+0.1=6.6+3.5=0.79+0.31=6.3+0.5=
二、混合运算。
0.83+0.42+3.76.4-0.52-4.4855.3-39.1-14
62.34-39.29+58.5182.48-47.45+69.187.9+5.41+1.76
80-(6.52+0.21)65.3-(24.9+2.5)6.3-4.38-1.22
一、口算。
8.7+0.5=8.4+3.1=0.76-0.02=8.2-0.5=
1.2+0.3=7.6+0.7=0.65-0.47=5.3+0.7=
4.6-0.4=8.9-4.4=0.8+0.09=6.3-0.9=
3.7+0.4=7.5+0.9=0.8-0.17=1.3-0.5=
3.6-0.7=6.3-1.9=0.66-0.21=7.9-0.4=
5.1+0.7=8.4+0.7=0.88+0.18=2.1-0.1=
2.1+0.8=6.1+2.6=0.67+0.24=4.1+0.9=
2.4-0.1=6.2-3.7=0.71-0.02=2.4-0.7=
二、混合运算。
0.76+0.31+57.5-0.84-1.1689.7+52.6-30.3
69.51-17.24+29.3486.18-39.14+67.434.59+1.17+2.8
30-(2.95-0.25)74.9-(22.9+6.1)3.94+2.41-1.4
一、口算。
8.9+0.1=8.2-2.8=0.83+0.25=5.6-0.1=
3.4-0.6=7.8-4.6=0.74-0.46=8.6-0.5=
1.9-0.1=7.1+0.4=0.72+0.41=7.5+0.4=
2.2+0.2=6.8+4.5=0.8-0.09=6.2-0.2=
2.3+0.1=6.8+2.7=0.74-0.21=1.8-0.7=
2.1-0.2=6.6-1.6=0.68-0.1=3.2+0.5=
4+0.8=6+1.9=0.87+0.29=8-0.4=
7.7-0.2=8.5-3.1=0.62+0.04=3.7-0.6=
二、混合运算。
0.87+0.26+1.77.9-0.14-0.8679.2+35.6+43
83.86+12.33+30.7880.11+47.11+40.945.25+1.66-1.18
20-(1.64-0.68)82-(11.6+1.7)5.16+3.36+1.58
一、口算。
8+0.5=6.2-2.3=0.74+0.28=1.5-0.4=
5.3+0.6=7.4+2.1=0.83+0.24=8.4-0.2=
6.9+0.8=7.4-2.3=0.84-0.43=3.3+0.3=
7.4+0.3=7.5+3.3=0.81+0.11=7.9+0.3=
4.1-0.9=6.5-4.9=0.67+0.35=8.9-0.8=
7.5+0.9=6.4-4.7=0.63+0.45=4.3+0.1=
3.4-0.9=6.7+4.4=0.72-0.25=3.4+0.9=
3-0.1=7.2+1.6=0.84+0.25=6.8-0.1=
二、混合运算。
0.77-0.11+5.49.8-0.27-3.7399-73+16.9
85.23+10.43+81.686.89+18.14+41.479.46+4.38+3.17
70-(6.51-0.21)73.4+(23.6-7.7)6.19-1.02-3.21
一、口算。
3.2+0.2=8.7-4.4=0.75-0.25=5.9+0.2=
6.2+0.5=8.6+1.2=0.84+0.1=6.8+0.4=
8.8-0.7=8.8-2.2=0.63-0.27=6.9+0.7=
4.5-0.4=7.5-1=0.79+0.49=1.3+0.8=
2.4-0.3=8.7+1.7=0.78-0.08=4.7+0.6=
1.9+0.5=6.2-1.6=0.63+0.38=6.7+0.8=
2.9-0.6=8.5-3.3=0.61-0.49=8+0.1=
3.8+0.6=7.8+0.7=0.75-0.19=2.2-0.5=
二、混合运算。
0.88+0.44+4.45-0.56-2.4437.7+19-15
85.79-36.2+96.5471.58+26.07+14.367.44+2.89+2.3
80-(4.11-0.48)79.9+(24.4-3.2)7.68+3.47-3.44
一、口算。
2.6+0.7=7.1-4.1=0.74-0.4=2-0.9=
6.8+0.1=8.4-4.7=0.79-0.47=5.4-0.7=
6.1-0.6=8.3+4.6=0.66+0.09=5.4+0.4=
8.5-0.7=7.4+3.3=0.66+0.03=6+0.5=
7.4-0.7=8.7+2.7=0.6-0.46=4.7-0.2=
8.7+0.2=7.2-4.4=0.85-0.13=6.4-0.5=
3.5-0.7=7.7+0.8=0.71-0.19=4-0.7=
8.7-0.8=7.3-1.8=0.75-0.08=2.3-0.6=
二、混合运算。
0.84+0.48+3.47.2-0.31-2.6989.8-60.7+24.5
73.43-44.6+79.1475.31-13.9+46.775.86-2.47+1.51
60-(8.97-0.41)95+(15.8+4.8)7.87-2.46-3.51
一、口算。
5.3-0.3=6+2.7=0.66-0.16=1.2+0.5=
7.4+0.5=7.4-1=0.67+0.47=4.7+0.5=
6.8+0.4=6.5-1.2=0.62-0.34=8.6-0.1=
6.5-0.4=6.6+2.7=0.76+0.28=7.4+0.9=
6.1+0.8=7.9+4.9=0.68+0.49=4.6-0.9=
2.5+0.9=7.4-0.6=0.77-0.19=3.3-0.8=
4.2-0.9=8-2.9=0.78-0.44=1.6-0.2=
6.4+0.1=8.1+4.9=0.72+0.49=6.5-0.7=
二、混合运算。
0.83+0.32+5.98.2-0.75-2.2593.8-56.6-11.3
66.08-42.3+99.1569.01+29.45+63.414.63-1.61+1.34
60-(1.67-0.72)71.2+(25.8+3.4)8.12+4.38+3.12
一、口算。
8.8+0.7=7.6-4=0.87-0.21=5.5-0.7=
5.8+0.5=8.2+3.5=0.81+0.34=1.3+0.7=
7.3+0.9=7.9-1.4