四年级数学下册小数加减法专项练习题18.docx

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四年级数学下册小数加减法专项练习题18.docx

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四年级数学下册小数加减法专项练习题18.docx

四年级数学下册小数加减法专项练习题18

一、口算。

6-0.7=9.6+6.8=79.2+9=0.84+0.12=

5.6-0.1=8.5-1.2=8.8-1.5=0.54-0.19=

1.7+0.8=2.1+0.6=60.2-5=0.82+0.05=

1+0.7=7.6+3=9.8-3.9=0.87+0.16=

8.2+0.5=7.8+1.6=82.3+5=0.8-0.38=

二、笔算。

8.85+0.93=82.42+1.75=8.37+4.23=94-4.5=

9.22-4.8=15.81+7.64=9.16-0.04=89.72+9.77=

5.27+0.13=90.42-1.98=7.24+3.23=94.5-3=

9.84-2.56=32.22+3.18=6.98-0.13=85.57+8.13=

一、口算。

8.8+0.1=1.6+1.8=83.5+2=0.51+0.35=

4.9+0.4=6.6+1.2=8+0.6=0.86-0.35=

6.7+0.8=9.5+1.8=92.8-4=0.93-0.38=

7.7+0.6=5.8+1.9=6.7+2.3=0.78-0.18=

3.3-0.1=1.4+4.1=60.7+6=0.88+0.01=

二、笔算。

2.97-0.63=82.99-6.3=9.78+6.31=73.8+46.4=

8.97+5.1=29.04-2.01=7.83-0.32=82.96-6.55=

2.34+0.42=49.26-1.3=7.82+5.23=88.2-12=

8.44+1.27=52.5-3.9=5.63-0.86=48.33+2.95=

一、口算。

4.8+0.9=8.2+4.3=36.4-5=0.5+0.18=

2-0.1=8.3+0.5=9-3.8=0.93-0.4=

5.6-0.5=2.3+7.6=92.3-1=0.99-0.05=

8.9+0.8=7.2+2.5=9.3+0.9=0.98+0.21=

1.1-0.5=4+7.3=14.1+3=0.56+0.26=

二、笔算。

8.78+0.16=84.15+3.32=7.92+6.71=79.9-4.4=

8.92+5.24=46.74-2.57=9.16-0.67=67.54+8.87=

4.59-0.64=85.22+1.41=8.95-1.34=98.9+2.1=

8.89+1.4=29.71-6.76=9.83-0.62=31.61+1.8=

一、口算。

2+0.8=0.5+2.8=13.8-7=0.91+0.1=

7.4+0.8=6.7-1.3=7.1-4.7=0.97-0.12=

7.5+0.9=8.1+8.5=76.6+4=0.56-0.34=

7.1-0.3=6-3.9=9.8-0.5=0.88-0.38=

4.6+0.9=3.4+7.1=97.3-3=0.97+0.4=

二、笔算。

2.41-0.97=53.02+5.35=9.4+2.94=90+42.6=

7.84-1.76=67.77-4.7=1.56-0.83=29.98-1.94=

1.1+0.08=63.97-3.4=9.7-3.85=71.7-7.8=

9.85+6.19=10.8+6.35=6.73+0.48=93.12-1.93=

一、口算。

1-0.9=1.4+2.3=89.6-5=0.97-0.4=

5.5+0.1=9.6-4.6=7-4.3=0.65+0.05=

7.1-0.3=5.2+3.4=45.9-4=0.53-0.28=

4+0.8=9.7+2.9=9.3-0.6=0.82+0.49=

8.6+0.3=4.6+7.7=47.6-6=0.75-0.26=

二、笔算。

1.2+0.27=23.92-5.17=8.62-1=69-38.6=

8.08-4.39=50+1.25=1.96+0.48=67.46+2.91=

6.68+0.92=54.32-4.78=8.36+6.97=87.6-13.7=

9.4+2.99=10.28+3.72=2.79-0.83=89.6+7.21=

一、口算。

8.6+0.4=1.7+9.9=98.1+1=0.93-0.39=

5.9+0.8=9.6+1.5=9.2-3.1=0.8-0.06=

1.2+0.3=8.1+1.3=55.6+5=0.87+0.26=

8.5-0.7=9.3+2.5=9.5+5.4=0.75-0.11=

7.6+0.1=6.3+5.8=80.9-2=0.66+0.45=

二、笔算。

1.73-0.66=26.18-9.74=9.54+6.23=56.8+28.4=

7.1+6.14=11.38-1.31=3.69-0.97=39.48+9.06=

1.54+0.88=34.17+3.2=7.74-4.21=57.2+22.8=

7.49-2.8=37.1-7.05=6.65+0.9=24.38-2.89=

一、口算。

4.5+0.8=7.6+8.2=26.7-7=0.69-0.38=

8.3-0.5=9.8-0.6=6.2+2.2=0.73-0.22=

8.7+0.2=3.6+8.6=61.8+4=0.9-0.25=

1.9+0.3=9.6+4.6=9.3+0.6=0.92-0.32=

3.6+0.4=5.4+7=63.6+6=0.53-0.04=

二、笔算。

4.66-0.44=95.38-5.27=8.92-2.96=63.4+25=

8.64+4.32=61.52+9.87=7.41+0.88=28.86+7.4=

4.56+0.91=99.53-9.72=9.75-2.96=82.3-49.6=

7.61+5.41=11.79+8.13=9.45-0.87=47.1+1.6=

一、口算。

5.3+0.1=5.2+9.4=43.8+9=0.98+0.16=

6.3+0.2=6.3+4.9=6.8+0.3=0.8-0.14=

5.6+0.3=6.2+0.1=75.6-4=0.65+0.2=

7.2+0.5=5.1+1.2=7.9+5.1=0.67+0.03=

3.1+0.9=9.5+6.2=24.7+9=0.79-0.19=

二、笔算。

9.52-0.29=82.1-5.43=8.15-6.62=79.5+49.4=

7.4+4.95=93.73-4.82=7.02-0.03=56.65-3.68=

6.97+0.92=80.41-4.95=9+4.39=75.6+20.4=

9.92+6.6=49.08+7.81=8.19+0.42=30.84-2.88=

一、口算。

8.7-0.8=0.8+9.7=53.3+3=0.84-0.45=

6.7-0.9=6.7+3.8=6.3-2.7=0.61-0.39=

6-0.5=4.7+7=76.5-8=0.5-0.13=

7.7+0.5=5.1-3.2=9-3.4=0.58+0.03=

5.1+0.2=4.2+8.8=48.1-1=0.56+0.06=

二、笔算。

9.22+0.28=53.62-1.32=8.33+3.22=82+5.5=

9.89+4.09=99.74-5.51=7.3+0.66=10.45-2.12=

2.12+0.64=78.67-9.66=8-5.97=65.9-30.4=

9.19-1.17=27.92-3.87=3.77+0.86=30.82-8.07=

一、口算。

6-0.1=3+6.1=67.6+5=0.87+0.29=

3.8-0.5=7.1-2.3=8+0.3=0.5+0.01=

3.3-0.1=5.7+2.4=22.6-4=0.72+0.4=

6.5-0.2=9.7-1.2=6.9-5.1=0.82+0.27=

1.1+0.9=8.8+2.5=96.9-9=0.59-0.26=

二、笔算。

1.81-0.24=43.35+4.33=9.4-6.68=95.2+25.2=

9.15-2.21=52.79+4.01=3.64-0.43=30.42-7.59=

5.62-0.46=51.6-7.62=7.13+4.59=76.8-8.9=

7.41+6.3=23.62-5.79=7.51-0.48=15.01-4.01=

一、口算。

5.4+0.8=2.2+0.5=86.1-8=0.76+0.46=

4.9+0.2=6.5+1.3=7.1-0.4=0.84+0.19=

5.7+0.2=7.7+7.4=14.3+7=0.9-0.1=

7.3+0.1=6-4.9=7.2+2.1=0.67-0.13=

8.3-0.7=1.6+8.4=75.5+7=0.73-0.04=

二、笔算。

6.89+0.16=63.47-8.69=9.17-1.32=88.8+34.5=

9.18+1.78=23.51-3.06=9.55-0.76=55.19+3.11=

9.84+0.67=59.14-3.74=8.62-3.32=67.2+5.5=

9.96+5.52=51.26-9.19=6.71-0.02=42.6+7.39=

一、口算。

5.3+0.7=6.8+8.6=49.2-1=0.75-0.34=

5.3-0.9=6-0.8=7.3+4.6=0.85-0.13=

2.3+0.7=8+0.3=53.2+4=0.52+0.24=

2.5+0.3=5.4+4.4=6.5+4.3=0.81-0.29=

5.8-0.3=6.7+3.8=48.4+9=0.65+0.19=

二、笔算。

9.99+0.83=56.36+2.24=8-4.94=70-6.5=

9.39-5.7=31.03+5.38=6.89+0.97=30.58+8.98=

9.69-0.79=96.26-5.27=9.8-6.06=58-24.3=

7.54-5.51=49.02-2.04=9.22+0.52=84.62-9.31=

一、口算。

4.1+0.6=2.6+7.4=96.8+3=0.87+0.14=

6.6-0.6=8.5-3.5=9.9+3.4=0.66+0.25=

8.6+0.6=3.1+8=43.1+5=0.65-0.39=

6.9-0.2=8+2.5=9-5.7=0.73+0.25=

8.7-0.5=4.1+7.3=88.2-5=0.74+0.4=

二、笔算。

5.49-0.78=30.84+5.27=8.57+4.41=76.6-29.7=

8.6-2.82=19.58+4.41=7.31-0.2=29.32-8.59=

3.31-0.5=29.27-2.55=8.19-2.14=50.5+46.6=

8.79-2.86=38.27+5.53=9.08-0.49=61.19-1.08=

一、口算。

1.3+0.7=0.2+1.3=87.5-9=0.84+0.2=

7.3-0.7=8.3+3.2=8.8-5.2=0.73-0.43=

7.8+0.1=8.9+5.3=88.9-4=0.79+0.06=

6.7-0.2=6.6-2.5=9-0.9=0.98+0.37=

1.7-0.1=1.5+5.8=46.8-5=0.79+0.02=

二、笔算。

3.94+0.39=43.54+4.94=8.37+5.35=61.7+46.6=

8.32-2.82=79.27+6.19=2.23-0.81=99.22-7.3=

9.19-0.07=45.94-7.12=7.17-3.17=56.6+28.8=

8.59+3.91=17.79+3.68=9.65+0.18=28.81+1.56=

一、口算。

5.3+0.9=0.6+4.5=83.5-4=0.87+0.03=

2.1+0.2=5.8-2.4=9-5.1=0.82+0.38=

2+0.5=0.4+3.7=76.5-7=0.57-0.32=

5.1-0.1=5.1-2.5=8.9-2.1=0.54-0.47=

5.4+0.4=4.3+6.7=17.9-8=0.73+0.48=

二、笔算。

8.84+0.18=83.15+7.98=8.05-3.08=59.9+34.9=

7.09-1.07=63.79+8.86=4.05-0.42=50.79-1.67=

5.69-0.74=23.43+5.92=9.05-2.92=52.7+1.5=

9.55-1.39=24.55-2.05=7.21-0.88=77.07-7.59=

一、口算。

2.8-0.4=7.9+1.3=38.8-3=0.53-0.11=

4.9+0.8=9.1+1.2=7.5-2.9=0.89+0.44=

7.9+0.1=3.7+0.8=87.5+7=0.57+0.4=

6.4-0.6=8.4+1.4=8.7+4.7=0.56+0.12=

6.9+0.9=4.7+2.6=59.7-9=0.71+0.16=

二、笔算。

3.33+0.41=63.74-5.96=8.58+3.09=91.7-28.6=

9.93+1.21=64.91-2.75=3.09-0.08=87.24+2.65=

9.44-0.74=53.71-4.68=7.75-3.85=70.6+37.5=

9.88+3.52=57.33+5.55=6.93+0.62=74.62+7.16=

一、口算。

2+0.2=7.4+5.4=55.9-6=0.76-0.25=

9-0.4=5.9-1.6=7.9-2.7=0.53-0.06=

8.2-0.4=9.9+0.4=52.6-9=0.69-0.46=

1.2-0.4=7.8+0.9=9.5+1.3=0.98+0.19=

7.9-0.9=2.9+4.9=23.6+9=0.65-0.23=

二、笔算。

1.41+0.75=83.72+4.65=9.76+6.53=82.9+14=

9.1+1.32=97.34-1.58=4.93-0.53=55.77+5.94=

3.83-0.93=37.85+4.58=7.66-2.16=64.5-6.4=

7.48-6.46=66.91-1.43=7.95+0.99=39.79+2.79=

一、口算。

6.6+0.9=6.9+6.7=35.6-7=0.7-0.27=

6.1-0.2=5-1=7.7-0.7=0.63+0.04=

6.4+0.4=5.4+7.3=29.4+5=0.59+0.1=

8.2+0.2=9.9+4.6=8.5-1.6=0.95-0.24=

7.4+0.1=8.3+4.7=52.5+1=0.75+0.44=

二、笔算。

2.51-0.78=97.97+1.68=9.11+2.28=89.4+46.4=

7.98-5.38=34.68+7.62=8.86-0.28=97.37+7.57=

9.32+0.87=92.73-4.9=7.53+2.27=59.3+20.2=

7.6-3.93=31.43-4.63=6.43+0.61=30.73+7.2=

一、口算。

2.7-0.5=7.6+1=23.5-5=0.7-0.19=

8+0.6=9.2-0.2=6.8-1.7=0.67-0.39=

8+0.4=4.1+7.5=57.7+9=0.59-0.22=

8.9+0.1=8.3-0.6=9.3+4.5=0.91+0.09=

5.7+0.9=5.8+4.1=13.5+8=0.96+0.03=

二、笔算。

9.97+0.19=31.56+1.07=9.67-3.95=80.6-20=

9.25-3.53=86.02+6.03=6.9-0.38=80.89-9.56=

1.01-0.11=48.05-2.54=7.11-3.12=65.7+44.7=

7.24-1.86=81.46-3.65=1.45+0.94=94.15+7.09=

一、口算。

1.9-0.6=2.8+7.9=46.5+4=0.68-0.04=

4.8+0.2=8.3-2.5=8.6-0.2=0.88-0.13=

8.4-0.3=4.5+7.1=26.3+3=0.97+0.09=

3.7-0.8=5.4-1=7.5+2.7=0.56-0.43=

1+0.7=6.8+1.5=39.3-4=0.62+0.49=

二、笔算。

8.24-0.26=78.73-6.8=8.27+6.92=90.4+14.5=

7.86+6.44=77.67-9.82=5.36-0.93=76.26-7.75=

4.1-0.46=90.8+4.56=7.36-4.41=90.6+40.8=

7.62-5.3=32.7-7.96=9.04+0.35=42.92+8.69=

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