人教版四年级数学下册小数加减法混合运算专项练习题70.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70
一、口算。
7.5-0.8=6.5-4.7=0.6+0.3=1.1-0.2=
3-0.1=6.9+0.4=0.66-0.3=6.2-0.4=
8.3+0.5=6.1-2.2=0.6+0.03=3.4+0.7=
4.5+0.5=7.4+4.5=0.7-0.04=7.7+0.8=
4.8+0.1=7.3-3.1=0.88-0.39=1.6+0.5=
8.3-0.1=7.9+4=0.81+0.16=3.7-0.4=
1.9+0.9=9+1.4=0.7-0.16=4.1-0.2=
7.7-0.3=6+1.8=0.72-0.48=6.4+0.2=
二、混合运算。
0.83-0.05+4.99.2-0.52-4.4851.2-13.8-14.2
68.42+38.46+54.0573.67-16.36+44.129.7+2.17+6.99
80-(7.19-0.43)94.3+(12.1+7.3)7.83-3.31+2.66
一、口算。
7.1+0.7=7.8+4.6=0.83-0.26=3-0.2=
8-0.9=7.7-4.8=0.85-0.16=4.8-0.1=
6.8-0.9=6.8+2.9=0.64-0.11=4.6-0.8=
1.3+0.6=8.7-4.2=0.63+0.16=5.6-0.3=
7.7+0.6=7.5-3.3=0.62-0.2=7.3+0.8=
7.2-0.7=7.7+0.4=0.81-0.24=7.8+0.8=
8.4-0.3=7.8+1.6=0.6-0.17=3.2-0.6=
5.9-0.4=7.9-4.3=0.64-0.24=7.6+0.8=
二、混合运算。
0.62+0.19+2.79.1-0.44-0.5645.8+23-16.4
83.09+21.14+38.9869.1+27.04+47.674.61+2.19+1.6
50-(2.7-0.45)82.2+(23.4+9.3)5.43-3.38-1.21
一、口算。
3.8-0.8=8.7+1.3=0.78+0.06=3.5-0.3=
4.6+0.5=7.2-0.3=0.79-0.39=5.4+0.3=
7.6+0.6=8.2-2.3=0.63-0.32=6.1-0.3=
4.7+0.3=7.1-3.9=0.77-0.35=2.6+0.5=
3.9-0.3=7.3-4.9=0.88-0.03=4.1+0.8=
9-0.5=7.1+2.3=0.9-0.36=5.9-0.3=
4.9+0.2=7.6+4=0.66-0.18=7.2-0.5=
6.9+0.6=8.3+1.4=0.88+0.13=2.4-0.8=
二、混合运算。
0.83+0.24+7.87.4-0.56-0.4472.9+50.3+18.8
66.37+22.32+26.1588.73+10.2+79.474.38+1.92-2.36
90-(6.97+0.49)62+(10.3+7.7)7.99-5.33-1.18
一、口算。
6.9+0.6=6.1-3.4=0.79+0.31=3.4-0.4=
5.8-0.3=7+4.3=0.88+0.02=6.4+0.1=
8.4-0.4=6.2+2.7=0.75-0.19=5.2+0.9=
2.8+0.1=8.3+3.2=0.85-0.14=3.7-0.6=
4.4-0.1=8.8+2.8=0.6+0.39=5.3-0.4=
3.6+0.1=7.7-3.7=0.64+0.06=4.5-0.4=
7.8+0.9=7.5-3.6=0.79+0.12=8.6-0.5=
8.1+0.3=6.8-0.3=0.6+0.06=7.7+0.3=
二、混合运算。
0.75+0.16+8.38.1-0.43-4.5793.6-17.3+71.3
81.71+32.09+69.9175.24+11.69+61.677.56+5.55-1.63
70-(6.08-0.47)86+(28.7+8.9)5.6+2.21+2.58
一、口算。
3.8+0.1=7+3.4=0.71+0.26=6.4+0.4=
4.8-0.6=8.2+0.9=0.61-0.15=8.7-0.6=
5.3-0.4=8.4-4.1=0.8-0.18=6.3+0.8=
2.7-0.7=6.7+1.8=0.82-0.27=6.4-0.5=
8.4-0.7=6.3+1.5=0.61+0.4=8.2+0.9=
3.7-0.9=7.9-2.5=0.69+0.08=2.3-0.2=
6.9-0.3=7.1+0.3=0.7-0.16=4.6-0.8=
1.6+0.8=7-3.6=0.83+0.2=5.8-0.5=
二、混合运算。
0.75+0.41+6.87-0.71-1.2965.6+40.7-23.5
68.97+32.88+94.9383.73-40.85+56.86.78-1.15+1.68
40-(6.19+0.72)75.3+(26-8.8)4.94-2.22-2.64
一、口算。
4.4+0.7=6.2-1.2=0.65-0.25=3.3+0.1=
3.7+0.9=8-4.8=0.84-0.42=5.4-0.5=
5.3+0.2=7.4-0.6=0.85-0.03=1.5+0.2=
6-0.3=7+0.1=0.79+0.36=8.2+0.8=
4.9+0.4=7.6-1.7=0.66-0.05=5.4+0.9=
2.9+0.5=8.5+1.3=0.66-0.03=1.4-0.4=
5.6-0.4=6.4-2.4=0.68-0.41=4.9-0.2=
8.9+0.7=8.3-1.6=0.75-0.3=7.4+0.7=
二、混合运算。
0.8+0.02+9.36.1-0.69-0.3186.4-10.8-48.9
62.33-21.63+59.4289.63+43.06+26.938.26-2.44+2
20-(3.97+0.61)68.5-(21.8-7.5)4.27+2.75+1.19
一、口算。
4.2+0.4=8.9-3.1=0.83-0.24=6.8+0.6=
3-0.8=7.6-4.8=0.72-0.32=5.1+0.9=
2.7+0.5=6.8-1.9=0.67-0.33=7.4+0.4=
6.7+0.7=8.7+4.7=0.6-0.1=5-0.2=
1.1-0.9=8.4+1.5=0.62-0.31=1.9-0.2=
6.1+0.3=6.2+3.1=0.67+0.03=6.5+0.1=
2.1-0.9=8.9-1.4=0.81-0.47=6.1+0.9=
5.8-0.1=6.7+4.5=0.85-0.33=3.5+0.8=
二、混合运算。
0.88-0.13+6.96.2-0.66-3.3446.1+23+16
85.03-28.32+38.1884.17+43.59+78.729.44+4.64-2.71
70-(3.73-0.87)94.2-(15.1-9.9)5.14-1.32+2.78
一、口算。
2.8-0.1=8-4=0.87+0.35=6.2+0.9=
2.3-0.2=6.4-4.7=0.89+0.49=4.9-0.4=
5.9-0.5=8.3+3.7=0.8-0.29=3-0.3=
2.7+0.8=7.2-0.5=0.67+0.25=4.9-0.6=
1+0.3=7.8-3.7=0.84-0.11=7.3-0.7=
4.4-0.9=6.7+2.2=0.74-0.12=7.6+0.2=
4.3-0.7=7.2+4.4=0.72+0.32=4.8-0.5=
5.9+0.7=6.1-1.5=0.72+0.2=2.1+0.3=
二、混合运算。
0.9+0.09+4.29-0.63-4.3758.8+36.4+18.9
72.35-11.94+17.677.94+22.46+64.735.74+2.82+1.31
60-(7.76+0.69)63.7+(17.8-8.8)5.68-2.71-2.32
一、口算。
4.5-0.5=7.5+2.6=0.64-0.41=4.4+0.1=
7+0.3=8.5-2=0.65+0.41=4.6-0.4=
8+0.6=6.2+3.2=0.8-0.26=3.7+0.3=
1.1-0.6=7.6-2.8=0.64-0.04=7.5-0.3=
1.1-0.7=8.1+4=0.81+0.19=7.9-0.8=
5.7+0.3=6.2-0.8=0.82-0.3=5.9+0.8=
6.4-0.5=8.2+4.9=0.71+0.41=3.7+0.4=
5+0.7=7.3+1.3=0.69-0.17=2.3-0.7=
二、混合运算。
0.81-0.47+2.97.3-0.78-4.2250.1+34.7-11.1
77.92+35.23+86.9672.39-25.67+72.356.11-1.39+2.55
30-(4.24-0.37)86+(18.2-1.3)7-4.76+2.16
一、口算。
1.6+0.7=7.3-3=0.71-0.03=6.8-0.5=
6-0.1=6.4-2.1=0.73-0.43=7.4+0.4=
6.5-0.2=6.8-3.3=0.82+0.24=6.5-0.7=
5.8+0.7=6.8-4.6=0.74+0.39=4.1-0.1=
5.8+0.2=6.6+0.5=0.75-0.19=3.6-0.3=
3.9+0.4=8+4.8=0.66-0.04=1.6-0.1=
6.5+0.2=6.3+2.1=0.83+0.04=6.6-0.7=
4.7-0.8=6.3+1=0.85-0.06=6.1+0.2=
二、混合运算。
0.67+0.26+3.79.3-0.12-4.8899.3-73.5-22.5
60.93-12.47+87.8270-30.66+57.243.87+1.74-1.13
80-(4.96+0.47)65.3+(13.6+9.3)8.26-5.39-1.77
一、口算。
1.1+0.6=7.8+2.9=0.73+0.02=2.7+0.8=
7.8+0.7=8.3-1.4=0.8+0.22=4.3-0.6=
5.4-0.3=7.2-2.8=0.6-0.44=3.5-0.1=
4.3+0.4=7.1-2.6=0.86-0.43=2.8-0.8=
8.7-0.6=8.3-0.8=0.66+0.32=7.8-0.7=
2.9-0.9=7.2-3.6=0.87+0.07=6.8+0.2=
4.8+0.5=8+2.9=0.72-0.36=1.3+0.7=
4.7+0.1=6.7-1.7=0.65-0.08=3.7-0.7=
二、混合运算。
0.71+0.3+6.47.9-0.86-3.1443.8-19.1+21.6
61.07+36.73+64.8888.75+42.68+49.293.56+1.92-1.42
90-(9.87-0.54)70.2-(20.8+5.1)9.25+1.48-4.09
一、口算。
7-0.1=6.8-2.3=0.61+0.41=5.6-0.2=
1.4+0.2=7.7+4.9=0.6-0.49=8.6-0.8=
2.8-0.3=6.5+1.7=0.71-0.02=2.2-0.1=
1.1-0.7=8.8-3.1=0.81+0.14=2.7-0.9=
7.5-0.8=8.1-3.9=0.78+0.12=4.6+0.7=
6-0.4=7.4-0.6=0.88+0.39=7.4+0.6=
8.1-0.1=8.7-0.8=0.61+0.25=5.9-0.7=
6.6-0.7=6.7-4.1=0.62-0.07=8.7-0.4=
二、混合运算。
0.77-0.14+7.27.8-0.16-1.8485.2+36.5-42.1
73.89+16.07+18.7561.99+45.83+80.399.35-4.6-3.93
20-(3.16-0.91)60.3+(25.2+5.2)9.52-2.3-4.6
一、口算。
5.5+0.1=6.7+3.7=0.72+0.13=9-0.5=
9-0.1=8+3.2=0.74-0.26=4.9-0.2=
7.7+0.6=6.7+3.9=0.66+0.16=8.2-0.9=
1.6+0.1=6.3+0.2=0.9-0.05=2.8-0.6=
5.6-0.5=9-0.3=0.9+0.19=3.4+0.7=
3.8-0.5=8.4+0.6=0.89+0.31=4.4-0.2=
7.9-0.7=6.4-4.9=0.69+0.02=4.6+0.3=
5.3+0.4=7.2-4.5=0.62-0.01=1.7-0.6=
二、混合运算。
0.82-0.39+7.86.8-0.27-4.7372.1+11.2+46.4
88.94-36.75+54.2460.04-19.21+11.087.33+2.79+3.76
80-(7.81+0.92)61-(17+5.3)9.03+4.9+3.76
一、口算。
4.5-0.2=6.2-1.8=0.79+0.32=8-0.4=
5.4-0.7=7.9+3.8=0.76+0.11=2.6+0.7=
9-0.6=7.7+4.1=0.77-0.39=1.5-0.5=
3.7-0.3=8.7+2.6=0.7+0.39=3.6+0.2=
5.2+0.2=8-4.9=0.6-0.24=5.5+0.8=
6.5+0.8=7.9-3=0.65-0.46=4.7+0.7=
6.1+0.3=6.9-1.4=0.76+0.15=5.1+0.7=
3.1-0.4=8.6-3.4=0.71+0.16=5.5+0.1=
二、混合运算。
0.68-0.41+5.17.8-0.76-1.2455.7+39.5-15.8
88.73-31.34+96.5185.86+33.24+93.25.83-1.26+3.91
60-(1.04-0.44)62.7+(25.2-3.4)3.73+2.18-1.27
一、口算。
4.9-0.4=7.8+2.9=0.85+0.44=6.7-0.3=
5.6-0.2=6.6+3=0.82+0.16=6.9-0.6=
3.6+0.6=6.8-4.2=0.83-0.49=5.4+0.7=
7.6+0.9=6.6-0.8=0.76+0.47=8.3+0.7=
5.4+0.6=8.3-3.3=0.83-0.48=2.1-0.7=
7-0.5=8.7+2.8=0.76+0.43=6.8+0.6=
1.5+0.1=9+3.2=0.66-0.17=4.4+0.3=
2.2-0.1=7.6+4=0.62+0.28=1.8-0.3=
二、混合运算。
0.8-0.42+5.78.7-0.33-1.6753.6-26.2+11.3
78.13+25.46+94.1572.93+31.85+11.333.77-2.02-1.46
20-(6.85+0.75)93.4+(27.6-9.5)4.33+1.77+1.52
一、口算。
2.5-0.3=8.2-3.1=0.82-0.36=1.9-0.5=
4.9+0.3=8.6-1.4=0.84-0.32=3.1+0.7=
2.5-0.7=8.8-3=0.71+0.03=4.7-0.7=
6-0.9=8.3+1=0.68+0.41=1.3+0.3=
2.7+0.9=7-1.1=0.63+0.16=8.8+0.9=
7-0.4=8.9-0.9=0.63+0.35=8.2+0.6=
3.1-0.1=7.4-3.4=0.78-0.08=1+0.2=
3.3-0.1=8+4.1=0.6+0.28=8.5-0.4=
二、混合运算。
0.79+0.32+3.28.8-0.21-2.7945.7+13.5+15.3
68.31-32.36+96.0163.38+48.98+12.67.16-4.98+2.12
50-(4.21+0.51)70-(23.6+1.9)4.24-1.11-1.7
一、口算。
8+0.7=7.5+3.5=0.61+0.19=6.7+0.9=
3.6+0.4=6.5+3=0.76-0.01=1.6+0.8=
7.2-0.2=7.7-3.6=0.66-0.03=6.6-0.1=
4.2+0.5=8.6+2.2=0.68+0.49=1.5-0.7=
8.7-0.6=7.4-1=0.88+0.33=7.8-0.6=
1.5-0.9=6.4-3.1=0.9-0.23=5.8+0.6=
8.8+0.6=7.3-3.9=0.81+0.17=4.1-0.7=
9+0.7=7.3+0.3=0.77+0.24=2.8-0.4=
二、混合运算。
0.64-0.16+2.25.6-0.44-3.5685.5-67.8+16.6
62.5+26.19+69.9370.92-21.73+55.726.61-3.4+2.1
70-(7.43-0.67)64.1+(18.6-8.6)3.84+2.22+1.26
一、口算。
5.7+0.3=6.3-2.8=0.85+0.42=6.6+0.7=
4.1-0.5=8.2+2.8=0.88+0.47=7.9-0.8=
1.1+0.5=8.5+