用递等式计算,能简算的要简算 ( 4 17 + 1 25 )×17×25 8.1÷〔( 4 1 7 -0.005×700
1个回答

(1)(

4

17 +

1

25 )×17×25,

=(

4

17 +

1

25 )×(17×25),

=(

4

17 ×17×25)+(

1

25 ×25×17),

=(4×25)+(1×17),

=100+17,

=117;

(2)8.1÷[( 4

1

7 -0.005×700)÷ 1

2

7 +3],

=8.1÷[( 4

1

7 -3.5)÷ 1

2

7 +3],

=8.1÷[

9

14 ÷ 1

2

7 +3],

=8.1÷[

1

2 +3],

=8.1÷3

1

2 ,

=

81

35 ;

(3)1234÷ 1234

1234

1235 ,

=1234÷

1234×1235+1234

1235 ,

=1234÷

1234×(1235+1)

1235 ,

=1234÷

1234×1236

1235 ,

=1234×

1235

1234×1236 ,

=

1235

1236 ;

(4)9999×2222+3334×3333,

=3333×6666+3334×3333,

=3333×(6666+3334),

=3333×10000,

=33330000.