四年级数学下册小数加减法简便计算专项练习题40.docx
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四年级数学下册小数加减法简便计算专项练习题40
一、填一填。
5.5+9.78+4.5=5.5+____+9.78
(1.72+2.02)+3.98=____+(____+____)
18.78-8.4-1.6=____〇(____〇____)
二、下面各题怎样简便怎样计算。
8.81+3.8+3.29.56-1.1-4.9
5.66-2.8+2.3412.6+0.87+0.13+17.4
9.3+3.5+5.97.23-0.58-6.42
56+1.2+5.6+787.47+0.14+9.86
2.39+0.88+7.615.85+8.6+0.15+1.4
5.8+2.17+3.83+4.27.34+8.15-5.34
一、填一填。
3.3+2.96+6.7=3.3+____+2.96
(7.17+4.03)+4.97=____+(____+____)
49.46-6.6-3.4=____〇(____〇____)
二、下面各题怎样简便怎样计算。
8.69+4.6+5.48.41-2.6-3.4
4.98-3.8+4.0219.3+0.21+0.79+3.7
8.7+8.8+2.39.38-2.03-4.97
49+5.5+3.9+275.67+1.25+7.75
3.76+4.79+3.242.39+8.8+6.61+1.2
5.8+2.04+4.96+2.29.41+5.07-6.41
一、填一填。
1.2+7.52+8.8=1.2+____+7.52
(4.31+4.13)+3.87=____+(____+____)
46.33-5.8-4.2=____〇(____〇____)
二、下面各题怎样简便怎样计算。
9.02+5.9+2.16.99-1.3-2.7
6.49-1.3+0.5113.4+0.58+0.42+16.6
1.1+8.6+6.79.78-1.56-4.44
19+6.9+4.4+835.26+1.04+6.96
3.97+1.12+4.031.47+5.4+7.53+4.6
1.3+3.31+4.69+4.78.94+3.31-5.94
一、填一填。
5.4+6.07+4.6=5.4+____+6.07
(6.24+3.06)+2.94=____+(____+____)
39.64-2.9-7.1=____〇(____〇____)
二、下面各题怎样简便怎样计算。
8.46+3.3+4.76.56-3.5-0.5
6.36-2.6+2.649.4+0.63+0.37+10.6
2.1+9.3+2.18.24-0.99-5.01
99+6.8+2.4+341.66+3.62+6.38
0.38+9.66+5.620.51+2.1+8.49+7.9
0.1+1.35+6.65+9.97.37+2.55-6.37
一、填一填。
9.8+1.34+0.2=9.8+____+1.34
(4.44+1.55)+6.45=____+(____+____)
29.13-3.9-6.1=____〇(____〇____)
二、下面各题怎样简便怎样计算。
4.04+1.3+4.77.43-3.8-2.2
4.48-3.8+2.5212.3+0.34+0.66+13.7
8.4+2.9+4.28.72-2.55-4.45
57+2.4+8.9+195.89+2.75+6.25
5.06+2.06+1.942.13+0.9+4.87+9.1
4.9+2.57+5.43+4.16.14+5.82-2.14
一、填一填。
7.6+8.43+2.4=7.6+____+8.43
(3.92+1.24)+8.76=____+(____+____)
38.19-7.9-2.1=____〇(____〇____)
二、下面各题怎样简便怎样计算。
6.98+3.8+2.28.64-1.6-2.4
5.05-2.6+2.955.9+0.84+0.16+23.1
5.6+6.8+9.37.71-3.46-3.54
28+5.5+8.2+651.98+2.22+6.78
5.21+6.78+1.794.12+6.1+3.88+3.9
5.8+4.81+1.19+1.27.18+8.81-6.18
一、填一填。
3.2+1.78+6.8=3.2+____+1.78
(2.66+4.93)+2.07=____+(____+____)
23.23-6.8-3.2=____〇(____〇____)
二、下面各题怎样简便怎样计算。
7.77+2.3+4.78.53-1.3-2.7
4.45-2.4+2.5517.3+0.03+0.97+8.7
3.3+9.2+8.58.57-3.43-3.57
25+2.9+9.3+116.19+1.62+6.38
5.57+4.47+1.435.42+7.7+4.58+2.3
3.6+3.79+5.21+3.47.55+1.72-5.55
一、填一填。
3.4+8.81+6.6=3.4+____+8.81
(8.42+2.88)+3.12=____+(____+____)
35.97-3.4-6.6=____〇(____〇____)
二、下面各题怎样简便怎样计算。
5.49+5.5+0.58.66-2.7-3.3
6.64-1.1+2.3612.4+0.39+0.61+15.6
5.8+9.7+2.37.49-2.62-4.38
15+9.3+7.4+968.46+3.53+3.47
0.14+3.94+5.862.52+5.2+7.48+4.8
2.4+4.35+1.65+5.67.99+5.12-3.99
一、填一填。
5.5+9.62+4.5=5.5+____+9.62
(2.82+2.97)+5.03=____+(____+____)
22.65-6.4-3.6=____〇(____〇____)
二、下面各题怎样简便怎样计算。
2.83+2.6+3.46.85-1.3-3.7
6.09-2.2+0.9113.9+0.26+0.74+12.1
7.8+3.5+5.98.08-2.62-3.38
49+7.9+3.9+811.51+0.81+7.19
3.75+0.02+2.250.46+1.8+6.54+8.2
0.8+3.91+4.09+7.26.21+3.25-5.21
一、填一填。
3.7+7.84+6.3=3.7+____+7.84
(5.28+2.79)+4.21=____+(____+____)
37.31-8.2-1.8=____〇(____〇____)
二、下面各题怎样简便怎样计算。
1.59+5.7+3.39.03-3.8-0.2
6.84-3.5+0.162.4+0.12+0.88+22.6
3.6+7.5+6.39.21-3.78-1.22
54+5.6+7.7+380.51+3.82+4.18
4.64+7.94+5.361.47+0.7+4.53+9.3
4.8+3.82+5.18+1.27.41+1.74-3.41