人教版四年级数学下册小数加减法简便计算专项练习题45.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45
一、填一填。
5.7+3.67+4.3=5.7+____+3.67
(2.68+3.38)+5.62=____+(____+____)
40.24-1.2-8.8=____〇(____〇____)
二、下面各题怎样简便怎样计算。
4.31+5.4+4.68.52-3.7-1.3
6.43-1.7+2.5714.6+0.13+0.87+11.4
1.1+4.3+2.98.89-0.49-5.51
74+5.3+5.7+566.05+2.48+6.52
3.69+1.78+3.311.41+8.4+5.59+1.6
1.9+3.29+2.71+8.18.81+8.27-6.81
一、填一填。
5.9+5.42+4.1=5.9+____+5.42
(3.03+2.15)+5.85=____+(____+____)
13.37-6.7-3.3=____〇(____〇____)
二、下面各题怎样简便怎样计算。
2.16+3.5+3.58.36-3.9-1.1
4.31-1.3+5.6911.1+0.18+0.82+17.9
7.6+2.7+5.98.21-2.75-4.25
73+5.1+2.6+275.33+1.71+7.29
2.89+2.81+6.113.33+9.2+6.67+0.8
1.5+4.72+3.28+4.57.35+9.35-3.35
一、填一填。
5.3+8.56+4.7=5.3+____+8.56
(3.95+4.26)+3.74=____+(____+____)
21.86-8.4-1.6=____〇(____〇____)
二、下面各题怎样简便怎样计算。
3.31+2.2+7.89.05-3.4-0.6
5.08-3.1+2.927.3+0.65+0.35+17.7
5.2+2.3+1.88.74-3.83-0.17
25+3.7+1.5+170.78+4.94+2.06
1.94+9.75+6.061.25+2.3+7.75+7.7
5.1+0.73+4.27+4.98.83+9.33-6.83
一、填一填。
8.2+5.43+1.8=8.2+____+5.43
(5.75+1.13)+5.87=____+(____+____)
28.47-1.8-8.2=____〇(____〇____)
二、下面各题怎样简便怎样计算。
4.13+3.8+2.27.56-3.5-0.5
6.16-2.6+2.843.2+0.44+0.56+19.8
4.7+1.8+6.19.79-0.89-4.11
53+6.2+9.8+981.41+3.89+4.11
4.97+7.36+3.034.09+3.2+1.91+6.8
5.9+0.96+8.04+0.17.01+6.97-2.01
一、填一填。
2.8+7.69+7.2=2.8+____+7.69
(5.18+2.72)+4.28=____+(____+____)
15.08-1.5-8.5=____〇(____〇____)
二、下面各题怎样简便怎样计算。
5.55+2.9+5.18.81-1.3-3.7
4.58-3.5+3.4219.1+0.36+0.64+6.9
5.3+3.4+3.38.98-2.13-4.87
33+3.8+7.5+348.13+3.29+5.71
0.13+8.58+6.874.16+9.2+4.84+0.8
5.2+0.86+9.14+3.88.77+9.08-5.77
一、填一填。
7.5+2.55+2.5=7.5+____+2.55
(7.15+1.98)+7.02=____+(____+____)
35.79-3.7-6.3=____〇(____〇____)
二、下面各题怎样简便怎样计算。
7.63+4.2+4.87.18-2.1-1.9
6.54-3.9+0.4619.4+0.32+0.68+8.6
8.2+2.9+1.47.02-1.71-4.29
86+8.2+8.3+784.51+5.75+3.25
3.83+6.08+6.170.01+2.5+9.99+7.5
1.7+0.39+5.61+5.39.79+6.33-7.79
一、填一填。
1.3+7.58+8.7=1.3+____+7.58
(2.72+1.75)+6.25=____+(____+____)
34.53-5.2-4.8=____〇(____〇____)
二、下面各题怎样简便怎样计算。
8.21+1.9+8.19.92-3.3-2.7
5.57-3.8+2.436.7+0.79+0.21+14.3
7.8+9.1+3.49.37-0.65-5.35
56+4.4+9.3+399.99+4.94+3.06
1.52+8.05+4.485.13+7.3+0.87+2.7
5.7+0.25+4.75+0.37.16+0.95-3.16
一、填一填。
9.3+1.23+0.7=9.3+____+1.23
(1.22+1.14)+4.86=____+(____+____)
21.84-7.3-2.7=____〇(____〇____)
二、下面各题怎样简便怎样计算。
1.98+3.8+6.27.24-2.1-1.9
6.69-2.4+1.317.5+0.01+0.99+13.5
7.8+2.3+1.68.26-2.37-3.63
98+5.2+3.4+490.52+0.68+7.32
0.61+2.87+9.391.72+1.1+6.28+8.9
5.7+0.28+6.72+2.37.12+4.38-3.12
一、填一填。
4.5+3.68+5.5=4.5+____+3.68
(2.23+3.87)+5.13=____+(____+____)
35.93-2.3-7.7=____〇(____〇____)
二、下面各题怎样简便怎样计算。
2.58+3.2+2.87.81-3.8-2.2
5.33-1.3+3.670.3+0.42+0.58+25.7
8.5+6.3+8.69.36-1.41-2.59
15+1.4+6.7+621.98+3.75+5.25
0.91+6.59+7.095.11+4.9+3.89+5.1
3.2+4.66+4.34+2.86.01+3.43-1.01
一、填一填。
3.8+7.57+6.2=3.8+____+7.57
(4.86+4.23)+5.77=____+(____+____)
15.31-8.1-1.9=____〇(____〇____)
二、下面各题怎样简便怎样计算。
9.84+2.5+5.58.12-1.6-3.4
6.42-1.5+1.589.3+0.56+0.44+11.7
7.9+3.8+2.47.55-2.17-2.83
92+4.3+3.9+772.85+5.15+1.85
4.25+6.75+2.754.44+8.6+4.56+1.4
0.4+4.66+2.34+6.67.35+2.88-6.35
一、填一填。
5.3+8.78+4.7=5.3+____+8.78
(4.98+2.66)+7.34=____+(____+____)
32.58-5.7-4.3=____〇(____〇____)
二、下面各题怎样简便怎样计算。
7.83+1.2+7.87.72-1.4-4.6
4.95-1.1+2.0518.3+0.13+0.87+7.7
9.1+9.5+7.38.71-2.38-3.62
12+9.6+8.3+454.36+0.68+9.32
2.82+5.91+6.182.83+0.7+4.17+9.3
4.9+1.82+3.18+5.19.92+5.66-4.92
一、填一填。
1.5+3.55+8.5=1.5+____+3.55
(6.29+2.99)+6.01=____+(____+____)
42.99-4.6-5.4=____〇(____〇____)
二、下面各题怎样简便怎样计算。
7.71+1.6+5.46.81-2.5-2.5
6.08-2.1+0.9214.3+0.26+0.74+9.7
1.6+4.3+4.79.67-2.29-1.71
75+2.6+3.9+185.75+1.39+8.61
5.95+8.28+3.052.52+5.5+5.48+4.5
3.7+1.73+7.27+3.36.06+0.68-2.06
一、填一填。
3.3+6.61+6.7=3.3+____+6.61
(2.11+3.07)+2.93=____+(____+____)
34.17-7.5-2.5=____〇(____〇____)
二、下面各题怎样简便怎样计算。
6.29+3.6+6.48.65-1.4-4.6
4.12-3.4+3.8816.1+0.55+0.45+10.9
7.2+7.4+3.38.53-0.29-4.71
43+9.4+4.3+312.03+1.66+5.34
4.65+8.85+3.355.66+5.3+4.34+4.7
2.4+3.24+1.76+3.66.46+3.53-3.46
一、填一填。
3.7+9.58+6.3=3.7+____+9.58
(3.22+3.12)+2.88=____+(____+____)
25.19-7.3-2.7=____〇(____〇____)
二、下面各题怎样简便怎样计算。
2.85+2.4+5.66.82-2.8-1.2
4.73-1.7+4.2711.3+0.15+0.85+10.7
3.2+8.1+4.38.12-1.16-2.84
31+3.7+5.9+120.34+5.28+4.72
2.03+2.72+6.971.46+8.9+5.54+1.1
2.7+1.64+4.36+6.36.01+9.03-1.01
一、填一填。
2.6+9.05+7.4=2.6+____+9.05
(1.37+1.28)+7.72=____+(____+____)
33.76-1.3-8.7=____〇(____〇____)
二、下面各题怎样简便怎样计算。
3.18+3.8+5.27.35-3.3-2.7
5.65-1.2+3.356.4+0.29+0.71+18.6
5.4+9.4+8.68.42-0.23-3.77
48+3.8+3.3+291.37+1.56+6.44
2.79+3.63+7.210.65+9.9+7.35+0.1
3.1+3.48+2.52+3.96.79+9.56-5.79
一、填一填。
3.2+2.03+6.8=3.2+____+2.03
(9.11+2.82)+7.18=____+(____+____)
24.07-4.3-5.7=____〇(____〇____)
二、下面各题怎样简便怎样计算。
2.01+4.9+1.18.99-1.7-2.3
6.86-2.1+3.1410.7+0.93+0.07+19.3
1.9+1.2+6.28.46-3.39-3.61
59+5.8+6.4+549.07+2.42+7.58
2.74+6.46+3.262.69+6.3+7.31+3.7
0.2+2.08+2.92+5.89.55+7.53-7.55
一、填一填。
7.9+7.33+2.1=7.9+____+7.33
(1.25+3.41)+2.59=____+(____+____)
32.98-3.4-6.6=____〇(____〇____)
二、下面各题怎样简便怎样计算。
4.12+1.6+5.46.44-1.5-3.5
5.73-2.8+3.2710.6+0.23+0.77+18.4
6.5+1.9+4.59.64-1.77-4.23
89+5.5+6.4+655.35+0.41+7.59
1.03+1.31+8.974.13+3.8+5.87+6.2
1.5+3.51+3.49+4.56.46+9.21-2.46
一、填一填。
6.6+2.65+3.4=6.6+____+2.65
(8.93+2.48)+7.52=____+(____+____)
44.38-5.9-4.1=____〇(____〇____)
二、下面各题怎样简便怎样计算。
8.95+2.2+3.86.05-2.3-3.7
6.24-3.8+3.7618.6+0.49+0.51+1.4