六年级分数乘法分配律练习题和详细讲解答案

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分数乘法分配律练习题7118

( 12-

5) ×60(6+9) ×18

551811

( 6-9) ×5(10 +

5) ×5

8427

( 9+27 )×2790×( 18+30 )

3212

( 5+25 )×256×(12 +3 ) 1536753

(

24-8)×1524×(24+6+4)

....

8171

(48+3)×24(20-5) ×20

5513

( 6-9) ×18(5+7) ×35 43171115

17 ×(

4+2)48×( 24+6+12 )

223536762

27× 4+

27

×

413

×

5

13

×

5

753743

12×6 +12×638×

11

11

×3

8

-----

. . . .

4

6 3 6 16

7 3 7

7

×13 +7 × 13

5

×13 -5 × 13

2

2

3

4

3 ×7+ 3 ×5

21

× 7 + 7 ×21

63 6

100 ×101

77 ×78

5

3

27 ×28

37

×

35

34

6

34× 35

13 ×12

. . . .

4

3

4 5 ×10

25

8 ×8

4

1

3

3 5 ×25

(

5 + 7 ) ×7×5

7 1

5

5

(

12-

5 ) ×5×12

(

6 - 9 ) × 6×18

7

7

6

6 10 ×101- 10

12

×

13

13

9

9

3

3

5 ×19+ 5

23

× 4 + 4

-----

. . . .

详解答案

7 1

1 8

(

12-

5 ) ×60 (

6 + 9

)×18

7 1

1

8

=12×60- 5 ×60 =6 ×18+9 ×18

=35-12

=3+16

=23

=19

5 5 18

1

1

(6-9)×5 (

10 +5

) ×5

5

18 5 18

1

1

= 6 × 5 - 9 × 5

=10 ×5+5

×5

1

=3-2

=2 +1

1

=1

=1 2

8 4

2

7

( 9

+27 )×27

90

×( 18 +30 )

8

4

2 7

= 9 ×27+ 27 ×27 =90× 18 +90× 30 =24+4=10+21

.

. . .

=28

=31

3 2

1 2

( 5 +25 )×25

6 ×(12 +3 ) 3

2

1 1 2

= 5 ×25+ 25 ×25

= 6 ×12+ 6 ×3

1 =15+2

=2+ 9

1

=17

=2 9

15 3

6

7 5 3

(

24 -

8 )× 15

24

×(24 +6 + 4 ) 15 6 3 6

7

5 3 = 24 × 15 - 8 × 15 =24× 24 +24×

6 +24× 4

1 3

=7+20+18

=4 -

20

1

=45

10

8

1

7

1

(48 + 3

)× 24

(

20 - 5 ) ×20

1 8 1

7 1 =48× 24 + 3

× 24 = 20 ×20- 5 ×20

1

=2+ 9 =7-4

1

=2 9

=3

-----

.

. . .

5 5

1

3

(6 -9 ) ×18

(

5 +

7 ) ×35

5 5

1

3

= 6 ×18- 9 ×18 = 5 ×35+ 7 ×35 =15-10

=7+15

=5

=22

4

3 17

11

1 5

17×(4+2

)

48

×( 24 +6 +12 ) 4 3 4 17

11 1

5

= 17 × 4 +

17 × 2 =48× 24 +48× 6 +48× 12

3 +2

=22+8+20

17

3

=2 17

=50

22 3

5 3

6 7 6 2

27 ×

4

27×4 13 ×

5

13 × 5

22

5

3

6

7

2

=(27 +27 )× 4

=13 ×(5 - 5 ) 3

6 =1× 4

13 ×1 3

6

= 4

13

7 5

3

7 4 3 12 ×6 +12 ×6

3

8 ×

11 +11 ×38 7 5

3

7 4

=( 12 + 12 )×6

=3 8

×(11 +11 )

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