# Answer Keys to Mathematics Problem for Grade 6 Elementary School Chapter 1 Round Number Hay All meet again with Jessica, Here Jessica will share a collection of Mathematics Questions for Elementary School 6 and Semester 1 and 2 with an Answer Key that Jessica got from a blog in Asia. new formula in mathematics.

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All Questions Jessica has prepared below please enjoy and use the best you can.

## A. HAVE CROSS SIGNATURES (X) ON LETTERS A, B, C OR D ON TRUE ANSWERS!

1. 241 + 25 – (- 37) – 204 = …
The results of the above calculation operations are ….
a. 99
b. 25
c. 79
d. 98

2. – 45 – 78 + 256 + (- 87) = …
The results of the above calculation operations are ….
a. 136
b. 46
c. 126
d. 36

3. 124 + 40 x 21 – 345 = …
The results of the above calculation operations are ….
a. 65
b. 619
c. 3,099
d. 2,359

4. 1,325 – 125: 5 x 16 = …
The results of the above calculation operations are ….
a. 3,840
b. 3,250
c. 925
d. 725

5. 75 + 20 – n = 135
The right number to change the letter n in the above calculation operation is …
a. 30
b. -30
c. 35
d. -35

6. Initial room temperature is 18 ° c, then the temperature during the day rises 5 ° c. Until the night the temperature drops 7 ° c. Then the room temperature becomes …
a. 30 ° c
b. 20 ° c
c. 15 ° c
d. 16 ° c

7. Mrs. Santi bought 15 packs of chocolate candy, she gave 3 packs to her child. The remainder was distributed to 10 of its neighbors. If each pack contains 85 candies. Then the amount of candy each neighbor receives is …
a. 102 candies
b. 98 candies
c. 75 candies
d. 125 candies

8. The temperature of an initial room is -5 ° C. The temperature of the room is raised 3 ° C every half hour. After 4 hours the room temperature becomes ….
a. 29 ° C
b. 24 ° C
c. 19 ° C
d. 7 ° C

9. In a truck there are 12 boxes, each cardboard contains 12 jars and each jar contains 12 sponge breads. So the sum of all sponge breads is …
a. 2,784
b. 1,728
c. 2,197
d. 2,744

10. 15³ = …
The value of the above numbers is …
a. 4,235
b. 2,255
c. 3,275
d. 3,375

11. 18³ … 6,000
you are right to fill in the points above is ….
a. >
b. =
c. <
d. + _

12. 6³ + 5³ – 9³ =
The result of the arithmetic operation above is …
a. 328
b. -328
c. 388
d. -388

13. 3,768 – 7³ + 10³ = …
The result of the calculation operations for the above numbers is …
a. 2,475
b. 2,735
c. 2,425
d. 3,245

14. The square root number 3 whose result is 9 is …
a. ³√343
b. ³√729
c. ³√6,859
d. ³√ 1,219

15. ³√343 x ³√1.331 = …
The result of multiplying the three root numbers above is …
a. 100
b. 77
c. 75
d. 121

16. (³√3375 + 5³): 10 = …
The result of the above calculated arithmetic operations is ….
a. 12
b. 13
c. 14
d. 15

17. ³√512 x ³√1.728 + ³√8,000 = …
The results of the above calculation operations are ….
a. 56
b. 66
c. 76
d. 86

18. The prime factor of 1,000 is …
a. 2 x 2 x 2 x 5 x 5 x 5
b. 2 x 3 x 3 x 5 x 5 x5
c. 2 x 2 x 5 x 5 x 5 x 5
d. 2 x 5 x 10 x 10

19. KPK of 15 and 6 are ….
a. 40
b. 50
c. 60
d. 30

20. KPK of 5, 9 and 6 are ….
a. 45
b. 60
c. 90
d. 80

21. FPB of 60 and 75 are ….
a. 10
b. 5
c. 15
d. 25

22. FPB of 32, 64 and 80 are ….
a. 16
b. 8
c. 24
d. 12

23. Bagas has three alarms. The first alarm is set to sound once every 6 hours, while the second alarm is set to sound once every 8 hours. Then the third alarm is set to sound once every 4 hours. Then the alarm will sound together every … once a hour.
a. 12
b. 16
c. 18
d. 24

24. Panji buys 100 white marbles, 45 black marbles and 50 yellow sponges. The banner wants to divide it into several containers. Each container contains 3 types of marbles with the same amount for each container. Then the number of containers that can be used as a banner is …
a. 3
b. 5
c. 15
d. 10

25. Riska, Bayu and Yoga learn martial arts in the same place. Riska departs once every 3 days, Bayu departs once every 2 days and Yoga departs once every 5 days. Then Riska, Bayu and Yoga will depart martial arts on the same day every … once.
a. 10 days
b. 15
c. 20
d. 30

## B. ANSWER THE FOLLOWING QUESTIONS TRUE!

1. 181 – (- 256) + 34 + (-176) = …
The results of the above calculation operations are ….

2. 1,235 + 156: 12 x 15 = …
The results of the above calculation operations are ….

3. (126 – 109) ³ = …
The value of the above numbers is …

4. 18³ – 7³ + 11³ = …
The value of the above numbers is …

5. n³ + 9³ = 1,072
The right number to replace the letter n above is …

6. .04,096 … .. 16
The right sign to fill the dots above is ….

7. ³√512 + ³√1.331 x ³√1.728 – ³√9.261 = …
The results of the above calculation operations are ….

8. The prime factor of 1,250 is …

9. KPK of 12, 8 and 15 are ….

10. FPB of 45, 50 and 80 is ….

## C. ANSWER THE FOLLOWING QUESTIONS TRUE!

1. Siska participates in a Math competition. The Rome Committee made a rule that each correct answer would be given a value of 5, the wrong answer given a value of -3. No answer given a value of 0. Of the 40 questions tested, Siska was able to work on just 35 questions, 5 of the other questions were not finished. After being corrected, Siska’s correct answers totaled 29 questions and 6 incorrect answers. So what is the total value obtained by Siska?

2. A cube shaped can has a side length of 20 cm. The can will be filled with sand until it is full. If every 1 cm³ of sand the weight is 12 grams. So how many grams of total sand will be filled in the can?

3. Determine the prime factorization of the numbers below:
a. 500
b. 650
c. 450
d. 576

4. Mrs. Dina buys various kinds of bread for her daughter’s birthday. 108 packs of brown bread, 96 packs of sponge bread and 120 packs of cheese bread. Mrs. Dina will accommodate in several large plates with the same amount. From this information, then:
a. What is the most number of dishes that can be used so that each type of bread is equally distributed?
b. What is the number of each type of bread on each plate?

5. Sintia, Tasya and Silfi are both taking lessons at Brilliant Tutorials. Sintia departs once every 2 days, Tasya departs every 6 days and Silfi departs once a week. They last departed on the same day on May 2, 2018. From this statement, then:
a. Every few days Sintia, Tasya and Silfi depart on the same day!
b. What date will they leave on the same day again?

## KEY ANSWERS TO MATH MATHEMATICS CLASS 6 SD CHAPTER 1 ROUND NUMBERS

1. a. 99
2. b. 46
3. b. 619
4. c. 925
5. d. -35
6. d. 16 ° c
7. a. 102 candies
8. c. 19 ° C
9. b. 1,728
10. d. 3,375
11. c. <
12. d. -388
13. c. 2,425
14. b. ³√729
15. b. 77
16. c. 14
17. c. 76
18. a. 2 x 2 x 2 x 5 x 5 x 5
19. d. 30
20. c. 90
21. c. 15
22. a. 16
23. d. 24
24. b. 5
25. d. 30

1. 181 + 256 + 34 – 176 = 295
2. 1,235 + 13 x 15 = 1,235 + 195 = 1,430
3. 17³ = 4.913
4. 5,832 – 343 + 1,331 = 5,489 + 1,331 = 6,820

5. n³ + 9³ = 1,072
n³ + 729 = 1,072
n³ = 1,072 – 729
n³ = 343
n = ³√343
n = 7

6. = (Remarks, ³√4,096 … .. 16 to 16 = 16)
7. 8 + 11 x 12-21 = 8 + 132 – 21 = 140-21 = 119
8. 2 x 5 x 5 x 5 x 5
9. 120
10. 5

1. Known:
The correct answer is worth = 5
Wrong answer is worth = -3
The number of questions Siska worked on = 35 questions
The number of questions Siska does not do = 5 questions
Number of correct answers = 29 questions
Number of Wrong Answers = 6 questions

The total scores obtained by Siska are:
= (29 x 5) – (6 x 3)
= 145-18
= 127

2. Known:
Length of side of cube = 20 cm
Mass every 1 cm³ of sand = 12 grams

The total mass of sand is:
= 20 cm x 20 cm x 20 cm x 12 grams / ³
= 8,000 cm³ x 12 grams / cm³
= 96,000 grams.

3. Determine the prime factorization of the numbers below:
a. 500 = 2 x 2 x 5 x 5 x 5 = 2 x 5 x
b. 650 = 2 x 5 x 5 x 13 = 2 x 5² x 13
c. 450 = 2 x 3 x 3 x 5 x 5 = 2 x 3² x 5²
d. 576 = 2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 = 26 x 3²

4. Known:
Number of brown breads = 108 packs
Number of sponge breads = 96 packs
The number of cheeses = 120 packs

a. The most number of plates that can be used so that in each type of bread is evenly distributed = looking for FPB of 108.96 and 120

Prime factorization of 108 = 2 x 2 x 3 x 3 x 3 = 2 x 2 x 3³
Prime factorization of 96 = 2 x 2 x 2 x 2 x 2 x 3 = 25 x 3
Prime factorization of 120 = 2 x 2 x 2 x 3 x 5 = 2 x 3 x 5

FPB = 2 x 3 = 2 x 2 x 3 = 12

So the number of plates is 12

b. The amount of each type of bread on each plate.
Number of brown breads = 108 packages: 12 = 9

Number of sponge breads = 96 packages: 12 = 8
Number of cheeses = 120 packs: 12 = 10

5. Known:
Sintia departs les = 2 days
Tasya goes to tutoring = once every 6 days
Silfi departs les = 7 days
Last departed on the same day = May 2, 2018

a. Every few days Sintia, Tasya and Silfi depart on the same day!
= Search for KPK from 2, 6 and 7

Prime factorization of 2 = 2
Prime factorization of 6 = 2 x 3
Prime factorization of 7 = 7
KPK = 2 x 3 x 7 = 42

So the three of them departing the same day for tutoring at Bimbel brilliant is once every 42 days.

b. What date will they leave on the same day again?
= May 2, 2018 + 42 days
= June 13, 2018

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