题目内容

你找到巧算的方法了吗?
(1)97×2000-96×2001 (2)(999×999+999)×100
(3)1.25×0.25×0.05×64 (4)9.728÷3.2÷2.5
(5)9876×9876-9875×9877 (6)38.4×187-15.4×384+3.3×16
(7)8.46×36+84.6×6.4 (8)3333.3×12340-111110×370.2
(9)0.1999+1.999+19.99+199.9 (10)(0.12+0.22+0.32+0.422÷(0.13+0.23+0.33+0.433
(1)原式=96×2000+2000-96×2000-96
         =2000-96
         =1904
(2)原式=999×(999+1)×100
         =99900000   
 
(3)原式=(1.25×8)×(0.25×4)×(0.05×2)
         =10×1×0.1
         =1
(4)原式=9.728÷(3.2×2.5)
         =9.728÷8
         =1.216
(5)原式=9876×9876-9875×9879-9875
         =9876-9875
         =1
 
(6)原式=38.4×(187-154)+3.3×16
         =38.4×33+3.3×16
         =(384+16)×3.3
         =1320
(7)原式=8.46×(36+×64)
         =846
 
(8)原式=3333.3×12340-111110×3×123.4
         =33333×(1234-1234)
         =0
(9)原式=(0.2-0.0001)+(2-0.001)+(20-0.01)+(200-0.1)
         =(0.2+2+20+200)-(0.0001+0.001+0.01+0.1)
         =222.2-0.1111
         =222.0889
(10)原式=(0.01+0.04+0.09+0.16)2÷(0.001+0.008+0.027+0.64)3
           
=(0.3)2÷(0.1)3
          =90
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