计算(能简算的要简算)( 4 11 + 1 17 )×11+ 6 17   (3618÷18-145)×29  56×(
1个回答

(1)(

4

11 +

1

17 )×11+

6

17 ,

=

4

11 ×11+

1

17 ×11+

6

17 ,

=4+(

11

17 +

6

17 ),

=4+1,

=5;

(2)(3618÷18-145)×29,

=(201-145)×29,

=56×(30-1),

=1680-56,

=1624.

(3)56×(1-

4

7 )÷

8

11 ,

=56×

3

7 ×

11

8 ,

=33;

(4)3.4-1.8+7.6-2.2,

=(3.4+7.6)-(1.8+2.2),

=11-4,

=7;

(5)4.2×6.8+4.2×2.2+2.1×2,

=4.2×6.8+4.2×2.2+4.2×1,

=(6.8+2.2+1)×4.2,

=10×4.2,

=42;

(6)[(

4

5 -

1

4 )×

6

11 ]÷

9

20 ,

=[

11

20 ×

6

11 ]×

20

9 ,

=

6

20 ×

20

9 ,

=

2

3 .