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Guide to solving exercises on pages 59, 60 Math 4 including solution methods
Guide to solve Exercise 1 on pages 59, 60 SGK Math 4
Problem:
Mental calculations:
a) 18 x 10
82 x 100
256 x 1000
18 x 100
75 x 1000
302 x 10
18 x 1000
19 x 10
400 x 100
b) 9000 : 10
6800 : 100
20020 : 10
9000 : 100
420 : 10
200200 : 100
9000 : 1000
2000 : 1000
2002000 : 1000
Solution Method:
* Rule for multiplying a natural number by 10; 100; 1000;...: When multiplying a natural number by 10; 100; 1000;... we just need to add one; two; three;... zeros to the right of that number.
* Rule for dividing a whole number rounded to tens; hundreds; thousands;... by 10; 100; 1000;... we just need to remove one; two; three;... zeros to the right of that number.
Answer:
a) 18 x 10 = 180
82 x 100 = 8200
256 x 1000 = 256000
18 x 100 = 1800
75 x 1000 = 75000
302 x 10 = 3020
18 x 1000 = 18000
19 x 10 = 190
400 x 100= 40000
b) 9000 : 10 = 900
6800 : 100 = 68
20020 : 10 = 2002
9000 : 100 = 90
420 : 10 =42
200200 : 100 = 2002
9000 : 1000 = 9
2000 : 1000 = 2
2002000 : 1000 = 2002
Exercise 2: Solve Problems on Pages 59, 60 of Math 4 Textbook
Problem:
Fill in the blanks with appropriate numbers:
70kg =....yen 120 tạ =...tons
800kg = ....tạ 5000kg = ...tons
300 tạ =...tons 4000g = ...kg
Solution Method:
According to the unit weight measurement table:
- Larger weight units than kilograms (kg): tons; tạ; yen
- Intermediate unit: kg (kilograms)
- Smaller weight units than kilograms (kg): hg (hectograms); dag (decagrams); g (grams)
- Each unit is 10 times larger than the neighboring smaller unit
- Each smaller unit is equal to 1/10 of the neighboring larger unit.
Answer:
70kg = 7 yen 120 tạ = 12 tons
800kg = 8 tạ 5000kg = 5 tons
300 tạ = 30 tons 4000g = 4 kg
Guide to Solve Exercises on Pages 59, 60 Math 4 Concise
Here is the solution to exercises on pages 59, 60 Math 4 in the section of solving math exercises for grade 4. Students can review the solution to exercises on page 58 Math 4 that has been solved before or preview this section to improve their grade 4 math skills. Wish you all the best in your learning journey.
In addition to the above content, students can explore more about solving Math 4 exercises on page 54 to enhance their knowledge of grade 4 math.
Furthermore, solving Math 4 exercises on page 55 Practice is an important lesson in the grade 4 Math curriculum that students need to pay special attention to.
