四年级数学下册小数加减法简便计算专项练习题247.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247
一、填一填。
1.7+3.64+8.3=1.7+____+3.64
(1.06+1.65)+5.35=____+(____+____)
15.97-4.3-5.7=____〇(____〇____)
二、下面各题怎样简便怎样计算。
3.66+4.6+5.46.65-1.7-3.3
5.16-2.4+1.841.3+0.99+0.01+27.7
4.2+4.3+6.97.31-1.73-5.27
25+4.7+3.5+332.92+3.77+3.23
2.38+1.26+4.625.95+7.3+3.05+2.7
5.1+2.87+3.13+3.97.88+5.76-6.88
一、填一填。
8.3+2.33+1.7=8.3+____+2.33
(6.65+2.15)+3.85=____+(____+____)
33.98-6.1-3.9=____〇(____〇____)
二、下面各题怎样简便怎样计算。
7.56+1.3+8.79.88-3.1-1.9
5.23-1.3+2.775.3+0.85+0.15+24.7
7.2+4.6+6.29.64-1.24-4.76
15+4.6+6.1+892.45+5.08+3.92
0.74+2.51+9.261.69+2.3+8.31+7.7
3.2+1.71+6.29+3.88.87+7.02-6.87
一、填一填。
4.3+1.18+5.7=4.3+____+1.18
(6.23+4.83)+3.17=____+(____+____)
40.43-3.1-6.9=____〇(____〇____)
二、下面各题怎样简便怎样计算。
4.81+5.9+1.18.29-1.7-2.3
5.78-1.1+1.222.5+0.72+0.28+24.5
8.5+4.6+3.37.46-1.07-2.93
33+3.4+2.9+233.25+5.77+2.23
0.12+9.08+5.882.54+0.4+4.46+9.6
4.2+4.04+1.96+3.89.01+7.38-5.01
一、填一填。
4.8+4.96+5.2=4.8+____+4.96
(2.34+2.22)+6.78=____+(____+____)
26.43-8.9-1.1=____〇(____〇____)
二、下面各题怎样简便怎样计算。
8.64+2.3+7.76.89-1.9-4.1
6.34-3.2+2.6619.3+0.62+0.38+6.7
7.6+6.9+4.68.01-2.49-1.51
96+9.2+2.6+610.87+1.84+4.16
5.98+9.45+0.022.55+1.1+5.45+8.9
3.9+2.67+6.33+4.17.79+7.62-6.79
一、填一填。
6.9+6.05+3.1=6.9+____+6.05
(9.49+1.04)+4.96=____+(____+____)
46.26-4.7-5.3=____〇(____〇____)
二、下面各题怎样简便怎样计算。
7.63+3.4+2.67.54-3.9-1.1
6.45-2.4+2.558.9+0.01+0.99+19.1
9.8+8.8+5.28.41-1.37-2.63
19+4.7+1.5+826.82+3.49+2.51
3.73+0.82+6.275.79+1.4+0.21+8.6
3.8+2.81+4.19+5.29.02+6.62-4.02
一、填一填。
3.9+6.87+6.1=3.9+____+6.87
(8.12+3.67)+6.33=____+(____+____)
29.65-6.5-3.5=____〇(____〇____)
二、下面各题怎样简便怎样计算。
4.34+3.6+5.46.84-1.1-4.9
4.93-2.8+2.076.4+0.51+0.49+20.6
2.3+5.1+7.57.32-0.31-3.69
74+5.8+5.6+437.57+3.37+5.63
0.31+5.75+7.694.19+0.4+2.81+9.6
5.3+1.71+4.29+2.77.14+8.65-5.14
一、填一填。
4.2+3.09+5.8=4.2+____+3.09
(1.68+4.08)+3.92=____+(____+____)
48.61-5.5-4.5=____〇(____〇____)
二、下面各题怎样简便怎样计算。
7.44+3.7+6.36.47-1.9-2.1
6.48-1.8+1.5218.4+0.36+0.64+9.6
9.4+3.3+8.38.25-1.11-2.89
58+2.8+7.3+865.27+0.12+9.88
1.09+5.93+4.912.18+7.7+4.82+2.3
1.4+1.23+8.77+8.67.92+7.52-6.92
一、填一填。
4.8+2.74+5.2=4.8+____+2.74
(5.92+2.95)+5.05=____+(____+____)
36.45-7.3-2.7=____〇(____〇____)
二、下面各题怎样简便怎样计算。
8.71+5.4+0.66.86-2.6-2.4
5.65-1.4+3.350.9+0.83+0.17+26.1
2.3+7.2+9.69.51-3.38-2.62
21+1.2+6.9+231.77+2.24+7.76
2.25+2.53+6.754.51+4.4+5.49+5.6
4.8+0.55+5.45+3.28.65+2.19-5.65
一、填一填。
5.8+2.17+4.2=5.8+____+2.17
(6.87+2.33)+3.67=____+(____+____)
38.49-3.3-6.7=____〇(____〇____)
二、下面各题怎样简便怎样计算。
3.42+5.7+1.38.37-1.3-4.7
6.39-3.8+1.614.6+0.12+0.88+20.4
3.5+5.9+6.47.77-2.31-2.69
17+9.9+9.6+313.97+4.81+2.19
0.39+0.44+8.612.35+6.8+4.65+3.2
3.9+4.04+3.96+2.19.81+0.56-5.81
一、填一填。
5.1+3.58+4.9=5.1+____+3.58
(8.61+3.85)+6.15=____+(____+____)
45.22-6.2-3.8=____〇(____〇____)
二、下面各题怎样简便怎样计算。
9.25+4.8+3.26.84-1.5-2.5
6.39-3.8+3.619.1+0.71+0.29+10.9
5.6+9.4+1.29.39-1.19-5.81
43+2.3+4.1+398.54+4.25+4.75
1.64+6.41+5.361.71+6.1+5.29+3.9
0.4+2.78+2.22+7.67.47+8.42-4.47