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Winter vacation life's Guidance Answer to Grade Seven Mathematics ()
Winter vacation homework (a) the answer

Fill in the blanks

1.9; 27; 27; nine

2.750

3.30; 990

4.? Four digits? 3 (4290, 4590, 4890)

5.2; three

6. 17(2、3、5、7)

7.39 1( 17、23)

8.2 10=2? 3? 5? 7; 16; 23 10; 2

9.6; 24; 14; 15

10. 1, 12 or 3,4

1 1.b; a

12. 1; abdominal muscle

13. 14; Forty two.

14.59

15.52; 13; 13; 52; 52; 13

16.②⑥; ①②④⑥

17.4,9 or 8,9 or 9, 10

18. 198 or 192

19.8520; 2085

20.0 or 6(9 120, 9 126)

2 1. Abdominal muscles

22.400( 135=5? 3? 3? 3, 1925=5? 5? 7? 1 1,486=2? 3? 3? 3? 3? 3)

Second, multiple choice questions

23.D

24.A

25.C

26.D

27.A

28.D

3. Find the minimum common multiple and maximum common factor of the following groups.

29.(87, 145)=29; = 144

3 1.(35,56, 105)=7; =22440

Step 4 solve the problem

33.4+ 15=9+ 10

4+ 15+9+ 10=38

34. 144? (2+3+7)= 12

So these three numbers are 24, 36 and 84 respectively.

35.954,873,62 1

36.260=2? 2? 5? 13=4? 65

37.- 1=59

38.= 12

3? 8? 12+ 1=3

39.63+9 1+ 129-25=258

258=2? 3? 43

So this integer is 43.

Winter vacation homework (2) the answer

Fill in the blanks

1.b; a

2.3,5,7; 4,6,8, 10; nine

3.2 10

4.60

5.( 1) 1; 1 1; 3; 9; 5; seven

(2)2; 10; 4; 8; 6; six

(3)4; eight

(4)5; seven

6.36; 36=2? 2? 3? three

7.70 1(700= 1? 700)

8.4 (Let B be X, then A is 6x+2, and C is 6(6x+2)+2, so x+6x+2+6(6x+2)+2= 188, and x=4).

9.2; 4; 1; 0; 0

10. 1 and 21; 3 and19; 5 and17; 7 and15; 9 and 13 (select three groups)

1 1.32

12. 14

13. and others

14.

15.2.5(20 =2.5)

16.

2. Multiple choice problem

1.a; B

2.B( 1+2=3)

3.B(3,5, 1 1, 17,29)

4.A

5.D

6.A

7.B

8.B( 18+30=48)

9.d( 1000- 142-76+ 10 = 792)

10.D (=24)

Three. Computational problem

1.2

2.23

Step 4 solve the problem

1.90= 1? 90=2? 45=3? 30=5? 18=6? 15=9? 10

So there are six kinds, namely 1 and 90,2 and 45,3 and 30,5 and18,6 and15,9 and 10.

2.336=2? 2? 2? 2? 3? 7=6? 7? eight

6+7+8=2 1

3.( 1)260=2? 2? 5? 13

So these two numbers are 4 and 65.

(2)420=2? 2? 3? 5? seven

So these two numbers are 4 and 105, 12 and 35, 15 and 28, 20 and 2 1.

4.( 1)

(2)

leave out

6.( 1)48=2? 2? 2? 2? three

So A=3 and B= 12.

(2) Omission

7.( 1) 16=3+ 13=5+ 1 1=7+9

So there are six such simplest scores,

(2) 1 1,

8. A situation:

In another case:

Winter vacation homework (3) the answer

Fill in the blanks

1.;

2.

3.

4.3; six

5.

6.5; 23; 2; 22

7.

8. (Let the original score be, then there is, and the solution is x=40)

9.;

10.5( )

1 1.9, 10, 1 1, 12, 13( )

12.( )

13.3; eight

14. 168(= 168)

15.5

16.28

2. Multiple choice problem

18.C

19.A

20.C

2 1.C

22.B

23.D

24. B ()

Three. solve problems

25.( 1)= 180

(2) 1800? 180+ 1= 1 1

26.2 1n+2(n= 1,6, 1 1, 16? )

The factor of 27.24 is 1, 2, 3, 4, 6, 8, 12, 24, so there are eight n's, namely 1, 2, 3, 4, 6, 8, 12, 24;

Yes 1, n= 1.

28.( 1)

(2)

(3)

29.( 1)( 1+27)? 27? 2+ 15=393

(2)( 1+ 14)? 14? 2= 105

1 15- 105= 10

So the score of 1 15 is

30.( 1+ 10)? 10? 2=55

Winter vacation homework (4) the answer

fill (up) a vacancy

1.

2. 12:2:9; 9: 10

3.35:42: 18 (A: B =5:6, B: C =7:3)

4.; 45%

5.

6. 1300000( 104000? 8%= 1300000)

7. the seventh five-year plan ((64- 16))? 64? 100%=75%)

8.5(6? ( 1+20%)=5); 90(72? ( 1-20%)=90)