四年级数学下册小数加减法简便计算专项练习题185.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185
一、填一填。
5.9+1.08+4.1=5.9+____+1.08
(6.17+1.92)+5.08=____+(____+____)
33.47-5.3-4.7=____〇(____〇____)
二、下面各题怎样简便怎样计算。
1.68+1.4+8.67.96-2.5-2.5
4.89-1.4+2.111.3+0.37+0.63+19.7
5.3+1.3+2.68.52-3.32-1.68
55+5.7+8.1+927.96+2.33+7.67
0.78+3.71+6.220.32+1.4+8.68+8.6
2.9+1.38+8.62+6.16.91+7.01-5.91
一、填一填。
4.8+6.68+5.2=4.8+____+6.68
(3.66+2.72)+3.28=____+(____+____)
13.39-1.4-8.6=____〇(____〇____)
二、下面各题怎样简便怎样计算。
3.08+2.8+5.26.52-3.1-1.9
6.47-3.8+0.5312.2+0.53+0.47+16.8
3.7+7.6+4.89.51-0.65-3.35
91+6.9+1.6+469.03+5.78+1.22
5.42+8.31+4.582.83+8.1+3.17+1.9
5.5+4.32+1.68+1.59.68+0.88-7.68
一、填一填。
6.7+7.97+3.3=6.7+____+7.97
(7.17+1.66)+5.34=____+(____+____)
39.61-6.1-3.9=____〇(____〇____)
二、下面各题怎样简便怎样计算。
4.96+5.8+1.27.56-1.1-3.9
4.59-2.7+3.4110.4+0.07+0.93+18.6
9.1+6.6+5.29.01-2.22-2.78
43+5.1+3.4+164.21+1.99+5.01
0.25+3.09+6.754.76+4.5+2.24+5.5
4.9+4.21+2.79+1.18.93+3.71-7.93
一、填一填。
2.9+8.86+7.1=2.9+____+8.86
(2.41+3.83)+6.17=____+(____+____)
42.07-5.7-4.3=____〇(____〇____)
二、下面各题怎样简便怎样计算。
2.42+4.6+4.49.79-3.1-2.9
6.97-1.4+2.0319.4+0.85+0.15+9.6
2.1+6.3+6.88.54-0.57-6.43
77+7.9+2.2+464.61+5.92+0.08
2.42+2.05+3.580.62+6.5+7.38+3.5
5.6+1.51+8.49+3.49.54+7.46-6.54
一、填一填。
8.3+6.61+1.7=8.3+____+6.61
(6.08+4.48)+2.52=____+(____+____)
21.22-2.6-7.4=____〇(____〇____)
二、下面各题怎样简便怎样计算。
8.88+1.5+8.56.86-1.7-4.3
4.82-2.4+5.1813.9+0.55+0.45+10.1
1.5+1.5+8.88.14-2.59-2.41
26+4.2+1.1+884.98+3.42+5.58
4.73+3.54+3.273.71+1.4+2.29+8.6
0.6+3.85+1.15+8.49.86+4.08-6.86
一、填一填。
3.6+4.74+6.4=3.6+____+4.74
(2.38+4.03)+2.97=____+(____+____)
20.68-7.9-2.1=____〇(____〇____)
二、下面各题怎样简便怎样计算。
5.89+4.1+5.99.66-2.5-2.5
5.37-1.2+1.635.9+0.34+0.66+14.1
4.7+6.9+6.17.83-3.93-2.07
54+3.3+9.9+922.67+2.24+7.76
0.55+9.34+8.450.63+6.3+6.37+3.7
4.6+0.53+6.47+2.49.47+0.15-5.47
一、填一填。
4.6+1.49+5.4=4.6+____+1.49
(6.79+3.61)+6.39=____+(____+____)
46.24-6.7-3.3=____〇(____〇____)
二、下面各题怎样简便怎样计算。
3.86+4.8+3.28.72-2.7-1.3
6.29-3.4+2.7115.9+0.83+0.17+10.1
8.6+7.3+9.68.89-1.26-2.74
56+2.9+4.7+153.87+3.89+3.11
1.12+5.54+6.880.79+2.9+9.21+7.1
3.8+1.74+7.26+2.27.41+7.78-5.41
一、填一填。
6.9+4.13+3.1=6.9+____+4.13
(3.19+4.42)+4.58=____+(____+____)
14.25-7.5-2.5=____〇(____〇____)
二、下面各题怎样简便怎样计算。
9.12+3.4+4.67.18-2.5-1.5
4.08-1.1+3.927.4+0.19+0.81+12.6
3.6+5.5+1.69.39-0.14-5.86
82+1.2+6.3+313.54+3.29+4.71
3.31+4.43+2.695.32+4.1+1.68+5.9
5.6+2.98+3.02+3.48.29+1.96-6.29
一、填一填。
2.3+2.46+7.7=2.3+____+2.46
(1.86+4.07)+1.93=____+(____+____)
31.97-1.7-8.3=____〇(____〇____)
二、下面各题怎样简便怎样计算。
1.44+3.1+5.99.02-1.4-2.6
4.86-2.2+5.143.2+0.95+0.05+18.8
9.5+8.7+9.78.12-3.63-0.37
11+4.3+2.9+989.53+4.18+2.82
0.83+6.09+9.172.77+8.1+7.23+1.9
0.3+3.81+5.19+8.77.61+7.27-3.61
一、填一填。
3.8+6.79+6.2=3.8+____+6.79
(9.51+2.28)+4.72=____+(____+____)
31.98-2.8-7.2=____〇(____〇____)
二、下面各题怎样简便怎样计算。
1.72+4.5+4.56.25-1.6-2.4
6.86-2.5+2.149.6+0.44+0.56+16.4
1.6+4.5+3.79.57-2.67-2.33
63+7.7+9.3+334.51+2.13+5.87
3.09+4.41+6.914.66+6.5+4.34+3.5
4.3+0.29+9.71+2.76.52+4.17-3.52