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Exercise 26: Concentrated Practice
Solving Math 4 Volume 1 Textbook, KNTT Book: Concentrated Practice on Page 88
Solving Exercise 1 on Page 88 Math Grade 4 Volume 1 Kết Nối Tri Thức Book
Problem: Calculate mentally.
a) Add 1,000,000 and 600,000, then subtract 200,000
Add 200,000 and 400,000, then subtract 300,000
b) Add 20,000,000 and (4,000 + 400,000)
Add 1,000,000 and (90,000 - 70,000)
Solution:
Solving Exercise 2 on Page 88 Math Grade 4 Volume 1 Kết Nối Tri Thức Book
Problem: D, S
Solution:
Solving Exercise 3 on Page 88 Math Grade 4 Volume 1 Kết Nối Tri Thức Book
Problem: Mathematician Lê Văn Thiêm is the first Ph.D. mathematician in Vietnam. Solve the box by calculating the values of the following expressions to determine his year of birth.
Solution:
Solving Exercise 4 on Page 88 Math Grade 4 Volume 1 Kết Nối Tri Thức Book
Problem: Mai and Mi saved 80,000 dong together. The amount that Mai saved more than Mi is 10,000 dong. How much did each person save?
Solution:
Solving Math 4 Volume 1 Textbook, KNTT Book: Practice on Page 89
Solving Exercise 1 on Page 89 Math Grade 4 Volume 1 Kết Nối Tri Thức Book
Problem: Set up and solve.
83,738 + 12,533
137,736 + 902,138
96,271 - 83,738
1,039,874 - 902,138
Solution:
Solving Exercise 2 on Page 89 Math Grade 4 Volume 1 Kết Nối Tri Thức Book
Problem: Calculate conveniently.
a) Add 73,833, then subtract 3,833 from the result
b) Add 85,600, then subtract 5,600 from the result
c) Add 30,254, 10,698, and 1,746
Solution:
Solving Exercise 3 on Page 89 Math Grade 4 Volume 1 Kết Nối Tri Thức Book
Problem: A charity fund received 28,500,000 dong on the first day, 47,250,000 dong on the second day, and 80,250,000 dong on the third day. How much did the charity fund receive in total over the three days?
Solution:
Solving Exercise 4 on Page 89 Math Grade 4 Volume 1 Kết Nối Tri Thức Book
Problem: Create a math problem based on the given diagram and solve it.
Solution:
Solving Exercise 5 on Page 89 Math Grade 4 Volume 1 Kết Nối Tri Thức Book
Problem: Can you solve this?
The number 178,265 is formed by arranging 6 digit cards as shown below.
Each time, Nam can only swap two cards with each other. How many moves does Nam need at least to get the number 268,157?
Solution:
Solving Math 4 Volume 1 Textbook, KNTT Book: Practice on Page 90
Solving Exercise 1 on Page 90 Math Grade 4 Volume 1 Kết Nối Tri Thức Book
Problem: Calculate the value of each invoice below.
Solution:
Solving Exercise 2 on Page 90 Math Grade 4 Volume 1 Kết Nối Tri Thức Book
Problem: Calculate conveniently.
Mai and Mi together folded 154 paper cranes. Mai folded 12 more paper cranes than Mi. How many paper cranes did each friend fold?
Solution:
Solving Exercise 3 on Page 90 Math Grade 4 Volume 1 Kết Nối Tri Thức Book
Problem: During the tree planting festival, Lê Lợi Primary School and Kim Đồng Primary School planted a total of 450 trees. Lê Lợi Primary School planted 28 fewer trees than Kim Đồng Primary School. How many trees did each school plant?
Solution:
Solving Exercise 4 on Page 90 Math Grade 4 Volume 1 Kết Nối Tri Thức Book
Problem: Can you solve this?
Place an addition sign between the digits to make the calculation correct.
Solution:
Here is the solution to Math Grade 4 KNTT page 88, 89, 90 Volume 1 Focus Practice. You can also refer to Solving Math Grade 4 KNTT page 91, 92, 93 Volume 1 Book - Exercise 27: Two perpendicular lines or review Solving Math Grade 4 KNTT page 87 Volume 1 Book - Exercise 25: Find two numbers given their sum and difference to reinforce knowledge.
