人教版四年级数学下册小数加减法简便计算专项练习题20.docx
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人教版四年级数学下册小数加减法简便计算专项练习题20
一、填一填。
2.5+4.46+7.5=2.5+____+4.46
(1.51+2.53)+7.47=____+(____+____)
34.36-3.4-6.6=____〇(____〇____)
二、下面各题怎样简便怎样计算。
3.68+5.8+4.28.02-3.9-0.1
5.22-1.1+3.7813.6+0.52+0.48+6.4
3.8+9.5+9.49.73-3.35-1.65
42+4.4+1.2+525.08+4.27+1.73
2.59+5.02+7.415.67+6.1+1.33+3.9
3.3+4.56+4.44+4.79.72+4.97-5.72
一、填一填。
7.1+1.75+2.9=7.1+____+1.75
(7.15+3.81)+2.19=____+(____+____)
23.72-2.7-7.3=____〇(____〇____)
二、下面各题怎样简便怎样计算。
9.39+4.6+3.47.81-2.3-2.7
5.56-3.4+3.448.9+0.87+0.13+20.1
8.5+3.8+1.28.74-2.14-1.86
37+9.5+6.1+549.48+4.16+5.84
0.34+1.12+9.662.56+7.1+6.44+2.9
2.7+1.03+7.97+5.38.08+3.73-7.08
一、填一填。
2.3+3.12+7.7=2.3+____+3.12
(7.39+3.31)+2.69=____+(____+____)
13.34-4.3-5.7=____〇(____〇____)
二、下面各题怎样简便怎样计算。
7.55+4.5+4.56.33-2.8-2.2
5.66-2.9+1.342.6+0.06+0.94+24.4
2.9+6.8+2.19.51-3.01-1.99
84+5.7+1.7+933.14+1.99+8.01
5.29+2.95+1.713.08+9.8+3.92+0.2
0.8+2.93+4.07+5.29.53+4.41-4.53
一、填一填。
4.6+8.61+5.4=4.6+____+8.61
(7.58+3.54)+2.46=____+(____+____)
44.73-2.7-7.3=____〇(____〇____)
二、下面各题怎样简便怎样计算。
4.63+1.9+7.19.17-1.2-3.8
4.49-1.1+5.5117.6+0.94+0.06+12.4
5.6+4.4+7.89.21-3.66-0.34
61+9.9+7.7+825.61+5.42+2.58
4.12+6.95+2.880.44+7.3+8.56+2.7
1.4+3.32+1.68+7.66.67+6.46-2.67
一、填一填。
9.3+4.63+0.7=9.3+____+4.63
(4.49+3.87)+3.13=____+(____+____)
44.46-7.6-2.4=____〇(____〇____)
二、下面各题怎样简便怎样计算。
7.72+3.3+3.79.67-1.2-3.8
5.92-1.7+2.080.5+0.63+0.37+26.5
2.2+6.6+5.99.72-0.18-5.82
35+1.2+3.6+424.07+3.82+4.18
5.12+8.39+0.880.97+2.1+6.03+7.9
0.1+2.57+3.43+9.99.77+0.88-4.77
一、填一填。
5.3+9.98+4.7=5.3+____+9.98
(2.61+2.54)+6.46=____+(____+____)
48.37-7.6-2.4=____〇(____〇____)
二、下面各题怎样简便怎样计算。
1.84+2.7+3.39.91-2.7-3.3
6.19-2.4+3.817.9+0.12+0.88+14.1
4.3+9.5+7.28.97-2.76-2.24
83+9.6+1.9+446.65+5.05+2.95
5.04+9.97+4.961.47+2.2+7.53+7.8
3.8+3.83+3.17+5.29.83+6.88-8.83
一、填一填。
8.5+2.23+1.5=8.5+____+2.23
(6.24+4.07)+2.93=____+(____+____)
42.72-4.4-5.6=____〇(____〇____)
二、下面各题怎样简便怎样计算。
1.19+3.7+5.39.92-3.8-0.2
4.36-3.5+3.6410.8+0.42+0.58+18.2
9.6+8.1+9.58.25-2.93-2.07
55+3.8+5.2+884.69+3.97+3.03
3.57+1.24+6.432.12+1.5+4.88+8.5
0.6+0.13+8.87+6.46.08+7.13-4.08
一、填一填。
5.4+3.62+4.6=5.4+____+3.62
(1.18+1.63)+4.37=____+(____+____)
12.75-7.6-2.4=____〇(____〇____)
二、下面各题怎样简便怎样计算。
8.43+1.4+5.66.24-1.7-4.3
6.89-1.7+1.111.9+0.76+0.24+27.1
7.3+9.2+2.78.45-3.59-3.41
94+8.1+9.8+517.36+5.43+2.57
4.63+2.81+4.371.24+6.4+7.76+3.6
4.6+3.37+1.63+2.48.18+7.96-6.18
一、填一填。
7.1+1.96+2.9=7.1+____+1.96
(3.38+4.99)+4.01=____+(____+____)
47.59-8.2-1.8=____〇(____〇____)
二、下面各题怎样简便怎样计算。
9.81+4.7+3.37.06-1.3-3.7
5.53-1.8+1.475.5+0.47+0.53+23.5
4.5+5.7+7.98.27-1.58-2.42
92+7.4+7.2+661.76+5.56+2.44
2.08+5.58+7.922.07+4.7+5.93+5.3
3.9+2.32+5.68+2.16.14+6.19-5.14
一、填一填。
4.2+4.63+5.8=4.2+____+4.63
(5.64+4.27)+1.73=____+(____+____)
25.26-1.4-8.6=____〇(____〇____)
二、下面各题怎样简便怎样计算。
4.05+5.1+3.97.88-2.4-1.6
6.97-1.3+2.035.3+0.34+0.66+23.7
1.2+9.1+1.79.81-0.76-4.24
43+6.6+6.3+241.83+0.41+8.59
0.83+0.76+9.170.38+4.6+7.62+5.4
5.4+2.32+2.68+4.68.72+2.58-5.72
一、填一填。
9.6+2.97+0.4=9.6+____+2.97
(9.51+1.48)+5.52=____+(____+____)
42.77-8.7-1.3=____〇(____〇____)
二、下面各题怎样简便怎样计算。
3.59+2.9+3.18.86-1.7-2.3
4.51-3.4+2.498.8+0.22+0.78+21.2
7.9+1.5+2.78.81-3.39-2.61
61+9.1+4.6+178.61+2.01+7.99
4.78+2.96+4.220.13+8.6+7.87+1.4
5.3+3.84+3.16+2.78.48+9.77-4.48
一、填一填。
5.1+5.26+4.9=5.1+____+5.26
(4.75+4.83)+2.17=____+(____+____)
47.35-2.4-7.6=____〇(____〇____)
二、下面各题怎样简便怎样计算。
8.94+1.2+4.86.94-3.3-2.7
4.11-1.6+4.899.4+0.21+0.79+16.6
9.2+6.3+4.79.84-1.38-3.62
24+6.1+2.8+545.73+4.99+1.01
3.96+6.48+3.041.26+6.5+6.74+3.5
2.4+3.28+1.72+4.66.63+0.83-2.63
一、填一填。
3.9+2.44+6.1=3.9+____+2.44
(7.82+4.13)+4.87=____+(____+____)
20.23-8.7-1.3=____〇(____〇____)
二、下面各题怎样简便怎样计算。
6.32+5.5+3.56.55-3.7-0.3
4.11-1.8+5.8916.8+0.55+0.45+13.2
9.2+4.1+1.77.24-0.01-3.99
14+5.3+1.2+650.98+5.66+2.34
5.59+6.97+3.411.82+8.6+5.18+1.4
1.1+0.48+5.52+7.97.65+8.52-3.65
一、填一填。
5.9+7.95+4.1=5.9+____+7.95
(1.69+2.31)+4.69=____+(____+____)
30.39-4.5-5.5=____〇(____〇____)
二、下面各题怎样简便怎样计算。
9.89+5.4+2.68.26-1.6-2.4
5.48-2.3+3.520.3+0.88+0.12+21.7
6.9+2.5+9.99.54-1.57-4.43
35+3.2+8.1+971.07+0.38+9.62
3.75+2.82+3.253.56+5.8+3.44+4.2
0.4+2.65+6.35+8.66.25+8.52-2.25
一、填一填。
4.4+1.17+5.6=4.4+____+1.17
(3.79+2.89)+5.11=____+(____+____)
29.32-4.8-5.2=____〇(____〇____)
二、下面各题怎样简便怎样计算。
9.84+3.9+4.17.56-3.4-2.6
4.59-2.7+4.410.2+0.42+0.58+29.8
6.5+2.7+3.87.29-1.14-3.86
25+9.5+6.3+584.95+1.26+7.74
5.16+0.86+0.843.51+2.9+4.49+7.1
3.9+3.78+4.22+3.19.03+6.31-8.03
一、填一填。
6.5+3.49+3.5=6.5+____+3.49
(6.06+1.41)+4.59=____+(____+____)
48.15-1.7-8.3=____〇(____〇____)
二、下面各题怎样简便怎样计算。
3.59+4.8+2.26.61-3.8-0.2
5.45-1.3+4.556.1+0.59+0.41+14.9
5.2+6.9+2.29.77-2.11-2.89
67+3.5+6.4+393.75+4.56+3.44
1.78+6.74+8.222.07+6.4+6.93+3.6
5.7+0.32+7.68+4.37.27+3.94-4.27
一、填一填。
8.2+2.84+1.8=8.2+____+2.84
(6.19+2.26)+7.74=____+(____+____)
42.21-8.1-1.9=____〇(____〇____)
二、下面各题怎样简便怎样计算。
9.33+2.2+3.89.39-1.6-4.4
5.34-3.2+4.6612.8+0.05+0.95+14.2
2.5+5.8+4.69.84-0.43-5.57
36+2.1+5.2+853.26+2.68+6.32
3.22+3.08+5.785.41+1.1+4.59+8.9
0.9+1.88+8.12+6.19.85+7.36-7.85
一、填一填。
6.3+1.18+3.7=6.3+____+1.18
(5.82+3.11)+2.89=____+(____+____)
41.52-5.9-4.1=____〇(____〇____)
二、下面各题怎样简便怎样计算。
3.59+5.3+3.77.64-1.3-4.7
6.42-1.2+2.581.5+0.79+0.21+18.5