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小数加减乘除的口算题

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最好是五年级上册的,不要太难

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1.(1+1/2)(1+1/3)(1+1/4)......(1+1/100) 
2.(1-1/2)(1-1/3)(1-1/4)......(1-1/100) 
3.8+2-8+2 
4.25*4/25*4 
5.7.26-(5.26-1.5) 
6.286+198 
7.314-202 
8.526+301 
9.223-99 
10.6.25+3.85-2.125+3.875 
11.9-2456*21 
12.0.5/11.5-4*2.75 
13.1/2×3/5 
14.3.375+5.75+2.25+6.625 
15.1001-9036÷18 
16.3.8×5.25+14.5 
17.2.1*4.3+5.7*2.1 
18.30×1/3 
19.102*45-328 
20.2/3×12 
21.2.8*3.1+17.6/8 
22.3/5×5/6 
23.(50-12.5)/2.5 
24.2/5×1/3 
25.6110*47+639 
26.1/2-1/6 
27.3.5*2.7-52.2/18 
28.1/7×1/5 
29.3.375*0.97+0.97*6.625 
30.25×4/5 
31.6.54+2.4+3.46+0.6 
32.5/6-1/2 
33.95.6*1.8+95.6*8.2 
34.1/2×1/5 
35.600-420/12 
36.344/3.6-5.4*0.25 
37.16/2+30/2+90/6 
38.3001-1998. 
39.5000-105*34 
40.0.15/0.25+0.75*1.2 
41.(1/2+1/3+1/4)*0.24 
42.(25+4)*4 
43.300-4263/21 
44.0.81/0.25+5.96 
45.403÷13×27 
46.1.5×4.2-0.75÷0.25 
47.3.27×4 +3.27×5.7 
48.(1.2+ 1.8)×4.51025-768÷32 
49.0.25×80-0.45÷0.9 
50.1025-768÷32 
51.0.25*2.69*4 
52.2348+275*16 
53.2/9*15/8-1/12*9/5 
54.2.4+2.4*(5.375-3.375) 
55.645-45*12 
56.0.15+1.2/0.24-0.45 
57.3.75-(2.35+0.25/1.25) 
58.76*1/4+23*25/100+0.25 
59.10-2.87-7.13 
60.0.96+9.6*9.9 
61.7.5-5.7*1/3 
62.12.37-3.25-6.75 
63.16*6.8+2.2*16+16 
64.401*19+284 
65.58.7-16.65/3.7 
66.0.4*4.7*2.5+(2.3+5.3) 
67.9.31-1.125-7.875 
68.640+128*45 
69.8.2*1.6-0.336/4.2 
70.400*(0.62+0.08)

网友回答

17×40=680, 100-63=37, 3.2+1.68=4.88, 2.8×0.4= 1.12 
14-7.4=6.6, 1.92÷0.04=48, 0.32×500=160, 0.65+4.35= 5 
10-5.4=4.6, 4÷20=0.2, 3.5×200=700, 1.5-0.06=1.44 
0.75÷15=0.05, 0.4×0.8=0.32, 4×0.25=1, 0.36+1.54=2 
1.01×99=99.99, 420÷35=12, 25×12=300, 135÷0.5=270 
3/4 + 1/4 =1, 2 + 4/9 =22/9, 3 - 2/3 =7/3, 3/4 - 1/2= 1/4 
1/6 + 1/2 -1/6 =1/2, 7.5-(2.5+3.8)=1.2, 7/8 + 3/8 =5/4 
3/10 +1/5 =1/2, 4/5 - 7/10 =1/10, 2 - 1/6 -1/3 =1.5 
0.51÷17=0.03, 32.8+19=51.8, 5.2÷1.3=4, 1.6×0.4= 0.64 
4.9×0.7=3.43, 1÷5=0.2, 6÷12=0.5, 0.87-0.49=0.38 

10.6.25+3.85-2.125+3.875 
11.9-2456*21 
12.0.5/11.5-4*2.75 
13.1/2×3/5 
14.3.375+5.75+2.25+6.625 
15.1001-9036÷18 
16.3.8×5.25+14.5 
17.2.1*4.3+5.7*2.1

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