人教版四年级数学下册小数加减法混合运算专项练习题48.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48.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48
一、口算。
2.9-0.3=8.6-1.7=0.66-0.44=8.4-0.4=
5.5+0.7=7.9-2.7=0.66+0.15=1.5+0.5=
2.1+0.1=6+1.5=0.67+0.18=5.2+0.2=
6.7+0.7=7.8+1.7=0.84+0.16=5.5-0.4=
5.3+0.5=6-1.1=0.68+0.34=4.8-0.9=
1.7+0.2=6.3+1.2=0.88-0.09=5.7-0.5=
1.3+0.3=7.1+1=0.7+0.13=1.2+0.7=
8.1+0.7=6.3-0.2=0.89+0.31=4.7-0.8=
二、混合运算。
0.89-0.33+0.66-0.63-3.3773.4+45.1-23.3
60.46-37.17+41.4860.63-44.34+14.479.58-7.48-2.05
40-(2.52-0.46)94.9-(18.5+1.3)6.41-1.96-4.09
一、口算。
2.8-0.8=8.4+1.8=0.85+0.02=4.2+0.4=
2.2-0.2=7.4+2.5=0.86-0.34=1.5-0.5=
3.8+0.8=8.2-2.2=0.65-0.48=2-0.8=
1.1-0.3=8.5+4.9=0.84+0.07=8.3+0.7=
5.6-0.2=8.4-2.1=0.85-0.3=3.5+0.6=
1.6+0.3=6.4+3.8=0.88+0.13=6.6+0.2=
2.9+0.5=6.4+3.7=0.76+0.01=5.4+0.9=
6.2+0.8=8.5-1.5=0.86-0.07=6.3+0.4=
二、混合运算。
0.67+0.38+87.4-0.83-0.1748.4-19.2-29
73.69-22.71+20.4971.51+16.47+26.93.56+1.37-2.04
90-(1.07-0.57)79.6+(29.2+8.4)4.96-2.83+1.25
一、口算。
2.7-0.7=7-2.7=0.68-0.25=7.4-0.9=
6.3-0.8=6.3+1.3=0.76+0.13=1.9+0.7=
1.7+0.1=6.6-2.8=0.62+0.24=1.3-0.8=
4.3-0.7=8.2-0.9=0.77+0.18=5.4+0.5=
5.8+0.3=6.9+4.6=0.64-0.15=3.7+0.6=
5.2-0.7=6+2.2=0.82-0.21=8.5+0.3=
8.7-0.2=8.4+1.4=0.84-0.39=4.2-0.6=
4.9+0.4=6.1-4.5=0.62+0.39=3.4+0.3=
二、混合运算。
0.75+0.19+0.89.7-0.29-3.7153.7-18.8-15.2
69.39-34.65+56.1385.84-33.72+27.668.19+4.59+1.74
90-(3.7+0.86)99.9-(16-4.3)9+1.64+2.04
一、口算。
5.7+0.9=6.7+1=0.85-0.46=7.1-0.5=
2.3+0.3=7.7-0.8=0.78+0.09=3.5+0.4=
4.2+0.9=7.8-0.2=0.68-0.03=8-0.5=
1.1-0.3=9+2.1=0.78+0.49=7.6+0.9=
5.4-0.8=8.2+0.8=0.87+0.18=6.9+0.3=
5.8+0.1=6.2-1.3=0.72-0.29=8.2-0.6=
1.1-0.2=7.4+4.7=0.63+0.22=2.1+0.7=
6+0.5=6.8-1.5=0.81-0.34=8+0.2=
二、混合运算。
0.69+0.05+3.25.4-0.79-2.2161.9-41-12
89.22-38.34+29.6262.18-37.09+98.646.84-3.47-2.15
30-(3.49+0.85)89.8+(29.3+2.7)8.31-5.85+2.37
一、口算。
1+0.5=6.9-1.1=0.72+0.12=1.8+0.4=
5.5-0.8=7.5+0.1=0.72-0.1=2.6-0.2=
2.6-0.1=8.4-1.8=0.68+0.48=7.4+0.1=
7.8+0.2=8.1-0.6=0.63+0.26=6.9+0.9=
6.1+0.1=7.9-2.1=0.69-0.46=7.1-0.4=
8.4+0.5=8.4-2.6=0.81-0.27=3.5+0.7=
5.4-0.8=6-0.2=0.62-0.12=8.4-0.5=
6.5-0.6=7.5-1.3=0.69-0.24=8.7+0.1=
二、混合运算。
0.87+0.21+8.36.6-0.42-3.5891.6+20.7+67.9
82.67-40.06+76.5463.03+13.8+259.47+5.93+3.34
80-(6.48+0.36)77.2-(24.2+3.4)8.44-6.1-1.02
一、口算。
7.3-0.3=6-1.6=0.78-0.22=7.8+0.6=
8.1+0.7=8.7+3.3=0.66+0.4=4.6+0.7=
2.5-0.2=6.3+0.8=0.67-0.2=6.5+0.9=
3-0.6=7.9+0.7=0.68+0.15=5.9+0.7=
4.6-0.5=8.8-4.8=0.8+0.05=3.6-0.7=
8.8-0.7=8.4+3.3=0.78+0.07=3.6+0.8=
1.6+0.4=6.7+1.1=0.6+0.06=1.2-0.9=
5.2-0.3=6-4.7=0.81-0.06=8.6-0.1=
二、混合运算。
0.87+0.32+1.99.1-0.56-1.4436.4-16.7+14.2
74.74+35.74+55.5170.95+44.77+67.25.42+3.11-1.93
40-(7.93-0.19)74.9-(28.3-4.9)5.04+1.02-3.78
一、口算。
1.6+0.6=6.2-0.9=0.75+0.43=5.1-0.1=
4.4+0.1=7.6+1.3=0.74-0.4=6.8-0.3=
6.1-0.5=7.5-3.7=0.87-0.04=6.7+0.1=
5.7-0.9=8.3-1=0.6-0.19=2.1+0.9=
8.8-0.6=7.5-3.7=0.63+0.27=2.1+0.1=
2.3-0.3=8.9+4.5=0.64-0.23=7.7+0.4=
7-0.2=7.2+2.3=0.79+0.25=5.1+0.2=
6-0.8=8.9-3.9=0.6+0.34=8.6-0.7=
二、混合运算。
0.68+0.01+88.9-0.29-2.7144.3+11.8+27.6
86.92+34.44+47.1967.67+12+60.818.3-3.01-3.77
20-(6.11-0.9)83.5-(26.7-4.9)7.72+3.33-3.07
一、口算。
5.5+0.3=8.9-3.2=0.82+0.47=2.4-0.2=
7.4-0.5=7.9+3.5=0.82+0.11=3.4-0.9=
3.8+0.8=6.2-2.5=0.61+0.15=5.4+0.3=
7.8+0.3=8.2+1.9=0.63-0.03=7-0.8=
2.5+0.3=7.4-3.2=0.6-0.28=8+0.4=
7.2+0.6=8+0.7=0.77-0.19=2.8+0.7=
8.9-0.3=8.7+1.1=0.7-0.01=7.1+0.1=
1.6+0.1=6.1-1=0.83+0.46=1.3-0.7=
二、混合运算。
0.78+0.14+6.37.2-0.88-3.1254.3+21+12.7
72.18-13.07+53.3765.49+41.53+98.846.88+1.52+5.32
70-(1.98+0.4)75.9-(27.4+1.9)4.55+2.53+1.79
一、口算。
4.7+0.6=6.9+2.3=0.63+0.31=1.9+0.3=
7.9-0.3=6.6-2.1=0.65-0.43=6.9-0.8=
8.1-0.1=6.5+3.1=0.61+0.24=1.8+0.3=
5.4-0.4=7.7+1.3=0.9+0.37=4.3-0.8=
3.5-0.4=8.8+1.5=0.65-0.49=3.6-0.4=
4.5+0.4=6+1.5=0.73-0.46=4.2+0.2=
8.2+0.1=8.2+2.8=0.75-0.17=6.3-0.7=
5.9-0.3=8.5+0.7=0.71+0.14=6.8-0.7=
二、混合运算。
0.64-0.38+6.96.8-0.76-4.2438.4+19.9-12.7
86.97-15.01+33.6970.18+21.54+79.678.42-3.38+2.08
40-(4.22-0.69)94.4+(14.1-4.9)4.16+1.16-1.02
一、口算。
5.1+0.3=8.5+4.6=0.81+0.1=7.3+0.5=
2.1-0.4=7.7-0.8=0.78+0.47=7.2-0.5=
2.3+0.5=8.3-1.8=0.81+0.14=3.8+0.7=
6.8+0.7=8.4-3.2=0.89-0.4=2.5+0.1=
6.4+0.8=6.3-0.8=0.88-0.35=4.7-0.9=
6.7+0.3=6.1-0.7=0.86+0.27=8.6+0.3=
1.6-0.2=6.5+2.6=0.71+0.35=5.8+0.6=
6.5-0.6=8.1-3=0.61+0.35=1.2+0.8=
二、混合运算。
0.87+0.24+6.68.7-0.67-4.3339-22.3-14.1
67.46-42.14+54.7672.85-44.22+39.797.74+2.63-2.16
50-(2.89+0.94)98.7-(19.5-8.3)9.46+7.14-2.12
一、口算。
5.7-0.3=8.2-1.4=0.76-0.19=8.7+0.9=
8.5-0.7=7.4+2=0.85+0.01=1.3-0.1=
7.6+0.3=8.9+1.1=0.74+0.38=6.9-0.1=
1.4-0.3=6.1-4.7=0.64+0.2=2.9+0.1=
8.5-0.1=7.8+1.7=0.79-0.36=8-0.3=
1.7+0.2=6.4+0.8=0.9-0.21=1.5+0.2=
2.5+0.6=6.5+3.5=0.77-0.24=8.4+0.1=
1.6+0.3=7.3+1.3=0.6-0.07=1.2-0.6=
二、混合运算。
0.83+0.3+4.16.6-0.72-0.2867.5-48.2-10.8
61.85+30.58+19.1361.01-12.61+63.045.19+1.68-1.18
30-(3.43-0.27)93.7-(12.2-6.2)7.93+3.51-1.63
一、口算。
1.3+0.1=7.8+3.6=0.87-0.33=1.7+0.5=
7.2+0.6=7.4+2.2=0.8+0.36=8.2+0.5=
9-0.8=6.7-4.7=0.85-0.2=3.6+0.9=
6.3+0.7=7.8+4.7=0.83+0.24=5.2-0.5=
6.4-0.3=8.6+1.9=0.6+0.37=3.5+0.8=
8.2-0.7=7.5+0.1=0.62+0.22=8.5+0.5=
7+0.1=8+3.7=0.67-0.33=8+0.9=
8.9+0.9=7.4-4.1=0.76+0.45=7.2-0.8=
二、混合运算。
0.73+0.12+8.88.2-0.47-1.5387.4-13.4+43.3
80.75+33.02+13.0462.99-21.33+78.799.14+4.63+3.97
60-(1.69-0.41)74.8-(16.7+1.3)4.24+2.11+1.58
一、口算。
7.9-0.3=8.9+2.9=0.69-0.05=8.4+0.7=
2.3-0.6=7.3+2.4=0.83-0.15=5.9-0.5=
8.7+0.4=6.8-2.6=0.67+0.11=2.4-0.6=
8.9-0.8=8.2-1.7=0.9-0.24=7.1-0.5=
6.3-0.4=6.4-3.8=0.71-0.45=3.3+0.7=
4.8+0.2=6.5+0.7=0.62-0.4=2.9+0.4=
8.6-0.2=7.4+2.5=0.66+0.07=8.7+0.1=
3.1+0.2=8.7+4.9=0.87+0.37=4.9+0.7=
二、混合运算。
0.89-0.35+39.9-0.79-4.2165.7+21.2+24.3
81.01+15.46+16.9578.63-18.69+55.227.6+3.71-3.05
30-(6.04-0.36)62.6-(20.9-7.6)7+4.06+2.37
一、口算。
8.1-0.3=7.6+2.3=0.67+0.31=2.8-0.9=
7.9+0.3=6-0.1=0.73-0.14=4.3-0.6=
2.2-0.5=8.5+4.9=0.77-0.07=2.1+0.2=
7.7+0.9=7.6+1=0.82+0.46=5.6+0.5=
6.1-0.6=6.4+1=0.89+0.18=4.8-0.4=
2.4-0.6=9+3.4=0.78+0.44=4.8+0.6=
8.5+0.9=9-4.8=0.79-0.23=3.7-0.5=
8.2-0.4=8.1-0.6=0.83-0.46=2.2+0.4=
二、混合运算。
0.83-0.07+1.55-0.19-0.8193.5+47.7-44.4
69.97-21.79+93.968.11+19.39+21.385.54+2.28-3.11
60-(6.32+0.24)82.7-(13.5+7.5)6.61+3.7+2.9
一、口算。
7.1+0.7=7.4+0.7=0.62-0.14=3.9-0.7=
3.7+0.2=8.1-2.6=0.86-0.06=5.8-0.2=
4.6-0.1=8.7+3.4=0.66+0.49=4.3-0.1=
8.4-0.9=6.7+1.6=0.69+0.44=1.5+0.9=
1.3+0.7=6.4+3.1=0.85-0.16=7.6-0.5=
6.3+0.7=8.4-0.2=0.85+0.17=5.4-0.1=
2.3-0.2=6.3-4.9=0.65+0.03=3.2+0.6=
3.3+0.8=6.3-4.3=0.84+0.37=7.7+0.8=
二、混合运算。
0.88+0.15+6.77.6-0.4-2.652.9-13.1+20.1
88.46+19.45+18.8485.32-30.44+14.553.73-1.38+2.32
90-(2.97-0.89)86.6+(26.9+4.9)7.72-5.45+1.84
一、口算。
3.8-0.9=6-2.6=0.77-0.15=7.6-0.7=
1.2-0.3=6.7+3.8=0.67+0.26=3.9-0.3=
4.1-0.5=6-3.6=0.64+0.09=2.4-0.6=
4.2+0.8=6.3-0.1=0.76+0.2=3.1-0.4=
4.8+0.9=8.6-0.9=0.74+0.39=4.8+0.4=
8.3-0.6=8.1+1.7=0.67-0.38=6.2-0.4=
1.3-0.5=6.7-3.4=0.81+0.48=7.4-0.8=
5.3-0.4=8.2-4.1=0.84+0.32=4.3-0.8=
二、混合运算。
0.72+0.27+4.75.2-0.24-2.7685.6-52.5+33
76.35-33.32+10.7484.93-23.45+47.468.54-3.18-5.3
20-(1.05+0.96)82-(10.9+8)6.95-4.65+1.91
一、口算。
3.5+0.2=6.1+2.3=0.81-0.33=4.1-0.6=
2.6+0.2=6-0.1=0.67+0.15=2.7-0.3=
3-0.5=7.5-0.7=0.86-0.43=6.4-0.5=
2.6-0.7=6.9-2.2=0.69-0.35=7.7-0.2=
2.2+0.4=8-4.5=0.81+0.01=6.1+0.3=
1.4+0.6=6.1-0.5=0.85+0.22=7.9-0.2=
8.3-0.1=8.7+1.8=0.89+0.24=6.5+0.6=
7.2+0.3=8.7-4.8=0.81+0.09=4.3+0.7=
二、混合运算。
0.77-0.13+9.19.9-0.55-0.4565.9-22.1+42.4
63.59-48.5+20.4875.18+11.51+21.879.38-6.03+2.16
50-(5.37-0.22)93.1-(24.5-4.9)4.76+1.16-1.19
一、口算。
6.9+0.6=6.2-0.7=0.75+0.13=4.8-0.9=
2.8-0.2=7.3+2.3=0.88-
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