人教版四年级数学下册小数加减法简便计算练习题21.docx
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人教版四年级数学下册小数加减法简便计算练习题21
一、填一填。
4.4+1.76+5.6=4.4+____+1.76
(1.69+2.22)+6.78=____+(____+____)
29.08-7.9-2.1=____〇(____〇____)
二、下面各题怎样简便怎样计算。
2.69+5.8+2.26.47-2.7-2.3
6.78-1.6+2.2212.8+0.87+0.13+8.2
9.3+3.8+1.57.61-1.95-2.05
38+2.1+7.4+149.65+0.67+7.33
5.22+1.69+3.783.07+1.3+2.93+8.7
5.6+1.74+8.26+4.48.15+5.51-3.15
一、填一填。
6.5+3.25+3.5=6.5+____+3.25
(7.44+2.71)+4.29=____+(____+____)
38.65-7.3-2.7=____〇(____〇____)
二、下面各题怎样简便怎样计算。
8.94+4.5+5.58.54-3.2-1.8
6.65-3.8+1.355.3+0.52+0.48+18.7
9.8+7.3+9.38.59-1.89-2.11
29+4.4+7.3+161.34+1.18+6.82
4.22+5.49+3.784.13+6.5+4.87+3.5
5.9+1.29+7.71+1.17.02+2.28-2.02
一、填一填。
4.7+5.63+5.3=4.7+____+5.63
(6.78+4.57)+5.43=____+(____+____)
48.67-5.2-4.8=____〇(____〇____)
二、下面各题怎样简便怎样计算。
1.21+3.9+2.18.41-1.4-4.6
6.31-1.2+3.698.6+0.14+0.86+12.4
2.2+8.5+6.38.84-2.19-2.81
33+6.1+9.4+435.49+5.11+2.89
3.56+8.33+6.445.22+0.6+0.78+9.4
2.9+0.52+6.48+3.17.09+2.89-3.09
一、填一填。
1.4+7.51+8.6=1.4+____+7.51
(7.23+4.62)+5.38=____+(____+____)
21.08-2.9-7.1=____〇(____〇____)
二、下面各题怎样简便怎样计算。
5.86+2.8+4.26.01-3.3-0.7
5.95-3.2+4.0514.4+0.74+0.26+15.6
5.3+3.6+4.89.94-1.72-2.28
32+1.3+2.9+554.56+0.14+6.86
0.76+3.09+9.241.71+2.2+5.29+7.8
1.6+3.56+2.44+5.49.89+7.27-4.89
一、填一填。
8.2+5.88+1.8=8.2+____+5.88
(9.81+1.08)+5.92=____+(____+____)
47.07-4.2-5.8=____〇(____〇____)
二、下面各题怎样简便怎样计算。
1.11+1.7+7.36.84-2.4-3.6
4.65-3.1+2.3513.3+0.06+0.94+10.7
3.9+4.1+1.37.95-2.43-2.57
55+7.1+9.8+823.89+2.07+3.93
3.22+8.76+5.784.96+2.2+2.04+7.8
3.5+2.32+4.68+5.57.78+7.72-4.78
一、填一填。
4.7+7.08+5.3=4.7+____+7.08
(7.84+4.06)+4.94=____+(____+____)
44.09-3.4-6.6=____〇(____〇____)
二、下面各题怎样简便怎样计算。
9.74+3.3+4.78.16-2.9-1.1
6.32-1.9+1.6816.6+0.87+0.13+11.4
7.5+1.8+2.77.97-0.85-6.15
84+3.2+3.1+454.64+5.79+0.21
1.99+3.63+7.012.36+6.3+5.64+3.7
3.4+3.01+5.99+3.68.73+6.92-6.73
一、填一填。
2.8+2.41+7.2=2.8+____+2.41
(9.33+2.18)+5.82=____+(____+____)
15.32-5.4-4.6=____〇(____〇____)
二、下面各题怎样简便怎样计算。
3.92+2.8+6.28.07-2.8-1.2
5.85-2.9+2.1511.9+0.83+0.17+10.1
4.9+7.4+9.39.56-1.54-5.46
93+8.8+4.3+954.88+1.06+4.94
1.94+0.17+6.064.79+8.3+1.21+1.7
3.5+1.79+3.21+5.57.88+7.72-2.88
一、填一填。
8.3+2.37+1.7=8.3+____+2.37
(1.55+3.21)+3.79=____+(____+____)
12.36-3.9-6.1=____〇(____〇____)
二、下面各题怎样简便怎样计算。
1.95+3.1+4.99.99-2.7-2.3
4.76-1.9+4.240.1+0.61+0.39+28.9
1.1+7.4+8.17.33-1.73-4.27
87+8.6+3.2+840.71+2.84+4.16
4.65+1.45+2.354.16+8.4+5.84+1.6
0.9+3.73+3.27+8.17.63+5.71-2.63
一、填一填。
4.9+5.44+5.1=4.9+____+5.44
(9.66+2.77)+5.23=____+(____+____)
28.65-1.4-8.6=____〇(____〇____)
二、下面各题怎样简便怎样计算。
4.54+3.3+2.79.05-1.7-3.3
4.88-2.6+3.127.1+0.82+0.18+15.9
4.8+7.5+7.48.14-3.86-0.14
34+5.8+5.7+466.47+4.77+1.23
4.81+6.83+3.191.89+7.8+5.11+2.2
4.9+1.15+3.85+5.16.85+1.09-4.85
一、填一填。
3.3+1.36+6.7=3.3+____+1.36
(1.53+2.22)+6.78=____+(____+____)
33.79-4.9-5.1=____〇(____〇____)
二、下面各题怎样简便怎样计算。
6.94+1.8+8.26.78-3.9-0.1
6.51-1.3+1.496.1+0.15+0.85+16.9
8.2+9.8+3.89.85-3.26-2.74
58+7.4+8.4+599.08+0.82+6.18
5.32+1.87+2.680.44+4.1+6.56+5.9
4.4+1.04+5.96+1.68.87+5.62-7.87
一、填一填。
1.4+8.64+8.6=1.4+____+8.64
(2.63+4.21)+5.79=____+(____+____)
27.49-6.2-3.8=____〇(____〇____)
二、下面各题怎样简便怎样计算。
9.41+3.9+5.19.87-2.6-3.4
6.89-2.5+2.110.4+0.94+0.06+24.6
1.3+2.7+3.89.17-3.26-2.74
51+8.8+6.6+479.27+2.11+3.89
4.44+9.62+5.562.45+0.8+3.55+9.2
0.6+4.32+2.68+8.48.45+8.56-6.45
一、填一填。
7.8+8.25+2.2=7.8+____+8.25
(8.06+4.26)+1.74=____+(____+____)
28.81-7.2-2.8=____〇(____〇____)
二、下面各题怎样简便怎样计算。
4.61+2.6+4.48.71-3.6-1.4
5.61-2.3+3.3917.7+0.03+0.97+7.3
6.3+8.2+5.49.48-1.41-2.59
25+4.2+6.1+270.82+3.48+3.52
4.59+2.26+4.410.93+5.6+7.07+4.4
0.7+0.03+5.97+5.36.06+8.24-2.06
一、填一填。
1.7+7.57+8.3=1.7+____+7.57
(8.17+3.22)+2.78=____+(____+____)
34.56-3.3-6.7=____〇(____〇____)
二、下面各题怎样简便怎样计算。
5.13+3.1+3.96.44-3.2-0.8
4.39-3.2+5.6113.4+0.55+0.45+8.6
2.9+1.8+7.27.12-2.45-3.55
75+5.5+3.2+393.13+2.68+7.32
1.88+8.36+8.123.42+7.4+5.58+2.6
4.5+1.46+5.54+1.57.92+2.68-5.92
一、填一填。
7.5+6.64+2.5=7.5+____+6.64
(8.28+2.95)+3.05=____+(____+____)
10.02-1.8-8.2=____〇(____〇____)
二、下面各题怎样简便怎样计算。
8.19+2.2+5.87.85-3.4-0.6
6.67-2.2+1.330.2+0.13+0.87+23.8
8.2+9.8+4.37.06-2.71-3.29
23+3.4+1.9+283.31+5.01+1.99
1.75+6.84+4.254.99+2.1+4.01+7.9
5.5+4.35+2.65+0.58.57+9.03-6.57
一、填一填。
4.8+3.76+5.2=4.8+____+3.76
(2.19+3.28)+3.72=____+(____+____)
45.46-5.6-4.4=____〇(____〇____)
二、下面各题怎样简便怎样计算。
9.03+3.7+6.37.67-2.3-2.7
6.13-1.4+2.876.4+0.17+0.83+18.6
3.6+4.7+5.37.49-1.23-3.77
35+6.7+9.4+395.88+1.65+8.35
2.79+5.68+5.215.79+9.1+1.21+0.9
0.7+2.43+5.57+7.37.15+2.27-5.15
一、填一填。
7.7+9.57+2.3=7.7+____+9.57
(9.62+1.56)+8.44=____+(____+____)
21.95-5.8-4.2=____〇(____〇____)
二、下面各题怎样简便怎样计算。
1.94+5.9+0.18.83-3.1-0.9
4.89-2.7+4.119.1+0.02+0.98+17.9
2.2+2.3+8.69.21-3.73-3.27
41+8.3+8.9+495.34+0.43+9.57
2.34+9.98+3.664.61+1.5+2.39+8.5
4.1+4.78+2.22+3.97.07+1.33-4.07
一、填一填。
8.5+7.82+1.5=8.5+____+7.82
(1.88+3.51)+6.49=____+(____+____)
46.27-5.7-4.3=____〇(____〇____)
二、下面各题怎样简便怎样计算。
2.25+2.2+3.89.76-3.3-0.7
6.54-2.5+0.467.7+0.48+0.52+14.3
2.7+7.7+1.59.17-2.34-1.66
21+9.2+1.3+926.68+5.37+4.63
3.68+6.71+3.322.24+2.1+7.76+7.9
0.1+2.12+3.88+6.97.96+8.07-3.96
一、填一填。
4.3+2.39+5.7=4.3+____+2.39
(7.27+1.99)+4.01=____+(____+____)
39.85-4.5-5.5=____〇(____〇____)
二、下面各题怎样简便怎样计算。
3.66+2.3+3.77.73-1.4-4.6
6.45-3.1+2.552.5+0.89+0.11+23.5