Solving Exercise 1 on Pages 91 and 93 of Math Grade 4 Textbook

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Ngày cập nhật gần nhất: 15/4/2026

Solving Exercise 1 on Pages 91 and 93 of Math Grade 4 Textbook in Concentrated Practice, Each Exercise Comes with Answers: A, B, C, D.

Guidance for Solving Exercise 1 on Pages 91 and 93 of Math Grade 4 Textbook

Solution Method:
- For part a): The problem provides the number 9 in the thousands place, so observe the given numbers, and if any number contains the digit 9 in the thousands place, choose that number.
- For part b): To add two numbers with multiple digits, arrange them vertically; place the first number on the top row, the second number directly below the first number; place the addition sign in the middle to the left of the two numbers; align the digits in the same column; then, perform addition from right to left.
- For part c): Set up the addition similarly to addition.
- For part d): The rule for dividing two numbers ending in 0s: When dividing two numbers ending in 0s, sequentially delete one, two, three,... zeros respectively from the end of the dividend and divisor, then perform division as usual.
- For part e): All shapes already have measurements of width and length of rectangles given, so simply apply the formula: S = a x b (where S is the area; a is the length; b is the width), calculate the area of each rectangle, and then compare the results with 30 m² to finish.

Answers:
a) The digit 9 represents 9000, so it must be in the thousands place. Therefore, circle B.
b) and c) Perform addition (subtraction) and then select the result to circle C and D.
d) 67,200 ÷ 80 = 6,720 ÷ 8
67 hundreds ÷ 8 equals 8 hundreds remainder...
Therefore, the quotient must have 3 digits, circle C.
Or:
- First division 672 ÷ 80
- Then there are 2 more zeros in the dividend, so 2 more divisions are needed, totaling 3 divisions.
Therefore, the quotient has 3 digits..
e) Calculate the area of each shape, compare it with 30 cm² to select
The area of shape P is 8 x 4 = 32 cm² which is greater than 30 cm². Circle C.

Mytour has just provided guidance on solving Exercise 1 on pages 91 and 93 of Math Grade 4 textbook. Additionally, we have suggested solutions for exercises 2 on pages 91 and 93 of Math Grade 4 textbook and 3 on pages 91 and 93 of Math Grade 4 textbook along with the methods. Check out the guidance on solving math problems in grade 4 on pages 91, 93 to excel in Grade 4 Math!

Frequently Asked Questions

What is the process for solving Exercise 1 on pages 91 and 93?

To solve Exercise 1, first identify numbers with the digit 9 in the thousands place for part a. For parts b and c, align numbers vertically for addition. Part d requires removing zeros from the dividend and divisor before division. Part e involves calculating the area of given shapes and comparing with 30 m².

How do you perform addition of multi-digit numbers in Grade 4 math?

To add multi-digit numbers, write them vertically, ensuring the digits align by column. Place the addition sign on the left and start adding from the rightmost column, carrying over if necessary. This method ensures accuracy and helps manage larger numbers effectively.

Can you explain the division method for numbers ending in zeros?

Yes, when dividing numbers that end in zeros, you can simplify the process by sequentially removing zeros from both the dividend and divisor. After removing the appropriate number of zeros, proceed with standard division. This method simplifies calculations significantly.

What formula is used to calculate the area of rectangles in Grade 4 math?

To calculate the area of a rectangle, use the formula S = a x b, where S is the area, a is the length, and b is the width. Simply multiply the length by the width to find the area, and then compare it to any given measurements.

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