人教版四年级数学下册小数加减法简便计算专项练习题89.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89
一、填一填。
5.2+6.33+4.8=5.2+____+6.33
(1.23+3.76)+5.24=____+(____+____)
16.67-6.8-3.2=____〇(____〇____)
二、下面各题怎样简便怎样计算。
6.46+3.6+5.49.72-3.5-1.5
5.58-3.4+2.424.8+0.88+0.12+19.2
4.2+6.6+4.89.34-1.24-4.76
84+7.9+7.7+734.96+1.04+7.96
2.98+0.76+3.020.67+1.3+6.33+8.7
5.8+0.65+6.35+3.26.41+8.84-2.41
一、填一填。
3.8+8.78+6.2=3.8+____+8.78
(8.19+3.71)+3.29=____+(____+____)
34.15-5.3-4.7=____〇(____〇____)
二、下面各题怎样简便怎样计算。
3.05+4.6+1.47.35-1.1-3.9
6.89-3.8+3.1117.4+0.69+0.31+7.6
8.5+1.2+1.77.95-2.35-4.65
37+8.4+5.9+377.39+5.41+4.59
5.53+3.82+3.475.42+7.9+4.58+2.1
1.7+0.12+8.88+8.39.45+9.57-6.45
一、填一填。
7.4+8.53+2.6=7.4+____+8.53
(3.45+4.19)+5.81=____+(____+____)
32.78-8.5-1.5=____〇(____〇____)
二、下面各题怎样简便怎样计算。
2.58+3.7+3.39.24-1.4-3.6
6.22-2.8+2.789.7+0.34+0.66+18.3
4.2+3.5+6.47.31-3.16-3.84
74+5.6+6.1+686.22+2.98+6.02
2.89+5.01+6.112.06+7.5+3.94+2.5
2.5+2.13+3.87+3.59.21+9.05-7.21
一、填一填。
7.7+5.06+2.3=7.7+____+5.06
(8.96+4.45)+5.55=____+(____+____)
35.99-3.7-6.3=____〇(____〇____)
二、下面各题怎样简便怎样计算。
8.99+2.5+3.56.83-3.5-0.5
6.01-3.7+3.990.2+0.03+0.97+20.8
8.9+2.2+1.47.96-0.18-4.82
95+6.7+1.5+793.97+2.04+7.96
0.45+5.39+6.555.74+0.2+0.26+9.8
1.8+2.44+5.56+8.26.66+9.56-1.66
一、填一填。
7.4+5.23+2.6=7.4+____+5.23
(2.73+3.01)+3.99=____+(____+____)
26.01-3.2-6.8=____〇(____〇____)
二、下面各题怎样简便怎样计算。
6.55+5.1+0.96.56-1.9-4.1
5.48-3.5+4.5213.7+0.72+0.28+15.3
3.4+9.7+7.59.32-2.26-2.74
96+4.5+2.6+294.18+0.91+6.09
5.63+5.29+0.371.99+0.5+6.01+9.5
5.4+2.18+2.82+3.67.09+5.97-2.09
一、填一填。
4.8+8.44+5.2=4.8+____+8.44
(2.75+4.54)+5.46=____+(____+____)
37.73-1.5-8.5=____〇(____〇____)
二、下面各题怎样简便怎样计算。
3.34+4.4+4.66.62-1.7-2.3
4.16-1.9+5.845.5+0.76+0.24+19.5
5.5+8.6+1.59.73-1.36-4.64
55+7.6+9.1+991.52+3.79+5.21
5.37+0.26+3.632.79+4.8+6.21+5.2
3.3+2.69+4.31+6.78.33+1.92-5.33
一、填一填。
4.3+8.58+5.7=4.3+____+8.58
(1.66+1.95)+6.05=____+(____+____)
15.76-6.6-3.4=____〇(____〇____)
二、下面各题怎样简便怎样计算。
7.94+1.5+7.59.17-2.1-1.9
4.95-3.7+5.054.3+0.95+0.05+16.7
5.8+9.4+2.79.48-3.39-0.61
83+1.3+9.3+442.77+0.62+7.38
5.73+5.75+0.271.81+9.7+5.19+0.3
0.3+1.11+6.89+8.79.07+8.52-7.07
一、填一填。
7.9+5.69+2.1=7.9+____+5.69
(7.99+2.66)+3.34=____+(____+____)
37.41-5.7-4.3=____〇(____〇____)
二、下面各题怎样简便怎样计算。
7.28+2.4+5.67.99-2.6-3.4
4.31-2.2+2.690.6+0.24+0.76+25.4
2.9+2.4+4.98.42-3.99-3.01
95+7.4+7.6+810.86+0.67+9.33
5.69+1.18+3.311.82+3.7+5.18+6.3
1.7+4.77+1.23+4.38.19+8.73-6.19
一、填一填。
7.4+1.02+2.6=7.4+____+1.02
(1.06+2.03)+6.97=____+(____+____)
43.13-1.1-8.9=____〇(____〇____)
二、下面各题怎样简便怎样计算。
8.11+2.6+4.46.83-3.3-2.7
5.28-1.7+3.7212.4+0.29+0.71+15.6
3.7+8.9+6.37.89-1.55-5.45
99+6.2+4.9+476.68+2.24+7.76
2.21+7.77+6.795.45+0.8+4.55+9.2
2.4+2.77+6.23+5.67.32+2.78-5.32
一、填一填。
2.6+9.02+7.4=2.6+____+9.02
(2.31+3.28)+2.72=____+(____+____)
37.57-8.1-1.9=____〇(____〇____)
二、下面各题怎样简便怎样计算。
1.81+3.9+3.17.91-2.5-2.5
6.08-3.3+0.929.4+0.76+0.24+18.6
7.2+1.6+2.49.98-0.35-4.65
54+2.6+6.1+360.38+5.56+4.44
4.12+5.82+4.884.48+0.2+4.52+9.8
2.7+3.15+5.85+7.36.15+6.85-1.15
一、填一填。
7.7+3.62+2.3=7.7+____+3.62
(8.91+3.63)+4.37=____+(____+____)
28.78-1.6-8.4=____〇(____〇____)
二、下面各题怎样简便怎样计算。
5.33+2.6+6.46.12-2.4-3.6
4.85-3.2+5.1512.5+0.36+0.64+13.5
1.8+4.5+2.28.02-1.14-4.86
15+7.8+1.4+924.73+0.44+6.56
2.91+7.11+3.090.96+7.4+7.04+2.6
2.7+3.03+2.97+3.38.83+3.91-7.83
一、填一填。
3.8+3.15+6.2=3.8+____+3.15
(9.39+2.14)+3.86=____+(____+____)
47.85-5.7-4.3=____〇(____〇____)
二、下面各题怎样简便怎样计算。
3.57+1.9+6.19.71-2.3-2.7
4.58-2.5+3.428.7+0.51+0.49+19.3
5.9+7.2+1.89.63-1.94-5.06
78+5.9+7.1+197.08+5.02+1.98
5.84+2.64+2.161.23+8.1+4.77+1.9
5.4+2.73+4.27+4.66.31+1.48-5.31
一、填一填。
5.8+2.11+4.2=5.8+____+2.11
(8.53+1.56)+6.44=____+(____+____)
40.86-3.5-6.5=____〇(____〇____)
二、下面各题怎样简便怎样计算。
6.78+5.6+0.48.96-2.1-1.9
5.87-2.3+2.1311.2+0.32+0.68+8.8
2.8+7.5+6.28.03-3.89-2.11
46+1.7+6.1+649.28+4.72+4.28
0.12+1.29+9.881.68+6.6+7.32+3.4
0.9+2.37+5.63+5.18.14+8.87-4.14
一、填一填。
4.9+1.01+5.1=4.9+____+1.01
(7.95+2.43)+6.57=____+(____+____)
27.55-2.4-7.6=____〇(____〇____)
二、下面各题怎样简便怎样计算。
7.02+4.4+5.67.06-3.2-0.8
4.98-3.8+2.0212.8+0.34+0.66+7.2
1.1+4.9+4.58.64-1.38-5.62
11+4.9+2.4+877.21+5.61+2.39
2.57+5.26+5.434.65+4.1+4.35+5.9
2.4+2.27+2.73+3.69.01+2.21-8.01
一、填一填。
2.6+4.09+7.4=2.6+____+4.09
(4.11+3.95)+4.05=____+(____+____)
27.08-4.6-5.4=____〇(____〇____)
二、下面各题怎样简便怎样计算。
7.17+5.2+4.88.52-3.9-2.1
5.05-1.2+4.9515.3+0.28+0.72+12.7
5.5+5.3+3.27.79-3.08-2.92
69+8.4+5.2+877.01+1.16+8.84
4.76+6.99+3.244.57+8.1+2.43+1.9
1.2+0.05+4.95+8.87.23+4.27-2.23
一、填一填。
6.6+2.12+3.4=6.6+____+2.12
(4.45+3.63)+6.37=____+(____+____)
45.14-8.4-1.6=____〇(____〇____)
二、下面各题怎样简便怎样计算。
9.54+4.7+1.39.54-3.6-0.4
5.15-2.9+1.8518.6+0.48+0.52+9.4
8.7+7.3+2.47.89-3.45-3.55
66+8.5+8.6+253.77+0.54+8.46
3.88+2.93+4.123.11+6.9+2.89+3.1
4.9+1.95+5.05+2.17.26+5.45-5.26
一、填一填。
6.8+2.49+3.2=6.8+____+2.49
(4.12+3.17)+3.83=____+(____+____)
24.02-5.7-4.3=____〇(____〇____)
二、下面各题怎样简便怎样计算。
1.56+1.3+4.77.12-2.3-3.7
5.65-3.9+3.351.9+0.26+0.74+19.1
5.6+3.5+6.37.79-1.15-5.85
68+7.5+6.9+458.99+4.33+1.67
4.59+6.45+5.411.68+0.9+4.32+9.1
1.1+4.66+2.34+5.96.81+5.08-1.81
一、填一填。
8.3+4.22+1.7=8.3+____+4.22
(4.79+2.63)+6.37=____+(____+____)
28.17-7.9-2.1=____〇(____〇____)
二、下面各题怎样简便怎样计算。
5.78+3.9+2.19.43-3.1-1.9
5.81-2.9+2.1915.8+0.37+0.63+10.2