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求五年级口算和递等式计算题!急!

题目详情
求五年级口算和递等式计算题!急!
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答案和解析
口算题
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
计算题
30.8÷[14-(9.85+1.07)]
[60-(9.5+28.9)]÷0.18
2.881÷0.43-0.24×3.5
20×[(2.44-1.8)÷0.4+0.15]
28-(3.4+1.25×2.4)
2.55×7.1+2.45×7.1
777×9+1111×3
0.8×〔15.5-(3.21+5.79)〕
(31.8+3.2×4)÷5
31.5×4÷(6+3)
0.64×25×7.8+2.2
2÷2.5+2.5÷2
194-64.8÷1.8×0.9
36.72÷4.25×9.9
5180-705×6
24÷2.4-2.5×0.8
(4121+2389)÷7
671×15-974
469×12+1492
405×(3213-3189)
3.416÷(0.016×35)
0.8×[(10-6.76)÷1.2]
19.4×6.1×2.3 5.67×0.2-0.62
18.1×0.92+3.93 0.0430.24+0.875
0.4×0.7×0.25 0.75×102 100-56.23
0.78+5.436+1 4.07×0.86+9.12.5