Kunci Jawaban Pengayaan Matematika Kelas 7 Hal 35

Berikut.id – Kunci Jawaban Pengayaan Matematika Kelas 7 Hal 35. Teman, kalian sudah mempelajari materi tentang hitungan penjumlahan, hitungan pengurangan, dan hitungan dengan dua operasi: penjumlahan dan pengurangan.
Untuk lebih memahami materi, selesaikanlah soal-soal dibawah ini!

Kunci Jawaban Pengayaan Matematika Kelas 7 Hal 35

Penjumlahan

1. (+11) + (+4)

= + (11 + 4)

= +15

 

2. (-6) + (-12)

= – (6 + 12)

= -18

 

3. (+8) + (-1)

= + (8 – 1)

= +7

 

4. (+3) + (-10)

= + (3 – 10)

= -7

 

5. (+16) + (-16)

= + (16 – 16)

= 0

 

6. (-7) + (+2)

= – (7 – 2)

= -5

 

7. (-9) + (+13)

= – (9 – 13)

= +4

 

8. (+0,6) + (-1,8)

= + (0,6 – 1,8)

= -1,2

 

9. (-2,7) + (-3,5)

= – (2,7 + 3,5)

= -6,2

 

10. (- 1/3）+（+1/2 ）

= – (1/3 -1/2)

= – (2/6 – 3/6)

= +1/6

 

11. (-3/4 ）+（- 5/12 ）

= – (3/4 + 5/12)

= – (9/12 + 5/12)

= -14/12

= -7/6

 

 

Pengurangan

1. (+8) – (+4)

= (+8) + (-4)

= +4

 

2. (+3) – (+9)

= (+3) + (-9)

= -6

 

3. (+5) – (-2)

= (+5) + (+2)

= +7

 

4. 0 – (-13)

= 0 + 13

= +13

 

5. (-7) – (+2)

= (-7) + (-2)

= -9

 

6. (-9) – (+1)

= (-9) + (-1)

= -8

 

7. (-2) – (-15)

= (-2) + (+15)

= +13

 

8. (-1,9) – (+1,4)

= (-1,9) + (-1,4)

= -3,3

 

9. （+ 1/6）–（- 1/2）

= (+1/6) + (+1/2)

= (+1/6) + (+3/6)

= +4/6

= +2/3

 

10. (-2/7) – (+5/14)

= (-4/14) + (-5/14)

= -9/14

 

Hitungan dengan Penjumlahan dan Pengurangan

1. (-3) + (+2) – (+5)

Persamaan

= -3 + 2 -5

= -6

 

2. (+6) – (-7) + (-13)

Persamaan

= 6 + 7 – 7

= 0

 

3. (-6) – (+1) + (-3) – (-8)

Persamaan

= -6 – 1 -3 + 8

= -2

 

4. 3 – 8

= -5

 

5. -6 + 9

= 3

 

6. -7 – 4

= -11

 

7. -18 + 18

= 0

 

8. 5 – 19

= -14

 

9. -2 + 6 – 8

= -4

 

10. 7 – 9 – 5

= -2 – 5

= -7

 

11. 4 – 7 + 10 – 1

= -3 + 9

= 6

 

12. -12 + 4 – 3 + 7

= -4

 

13. 0,4 – 1,9

= -1,5

 

14. -1,3 + 2,7

= 1,4

 

15. (-2/5) – (3/5)

= -1

 

16. (4/9) – (5/6)

Persamaan

= 8/18 – 15/8

= – 7/18

 

17. -2 + (-10) – 6

Persamaan

= -2 – 10 – 6

= -18

 

18. 13 + (-2) – 5 – (-7)

Persamaan

= 13 – 2 – 5 + 7

=13

 

19. -7 – (+8) – (-3) + 9

Persamaan

= -7 – 8 + 3 +9

= -3

 

20. 1 + (-0,6) – 0,8

Persamaan

= 1 – 0,6 – 0,8

 

21. (-1/3) + (1/6) – (-2/3)

Persamaan

= -2/6 + 1/6 + 4/6

= 1/2

Nah teman, dengan memahami dan menyelesaikan soal-soal diatas kalian akan semakin memahami dan mengerjakan soal serupa nantinya.

Semoga bermanfaat..