Review to find two numbers when knowing the sum or difference and the ratio of those two numbers số Lesson 1 page 176: Write the correct number in the blank Sum of two numbers 91 170 216 Ratio of two numbers … [Read more...] about Review to find two numbers when knowing the sum or difference and the ratio of those two numbers

# Grade 4 Math

## Review on finding two numbers when knowing the sum and difference of those two numbers

Review on finding two numbers when knowing the sum and difference of those two numbers Lesson 1 page 175: Write the correct number in the blank Sum of two numbers 318318 [1945[1945 32713271 Difference of two numbers 4242 eighty seveneighty … [Read more...] about Review on finding two numbers when knowing the sum and difference of those two numbers

## Review on finding the average

Review on finding the average Lesson 1 page 175: Find the average of the following numbers a) 137; 248 and 395. b) 348; 219; 560 and 725. Solution guide: To calculate the average of multiple numbers, we calculate the sum of the numbers, and then divide that sum by the number of terms. a) The average of these numbers is : (137 + 248 + 395) : 3 = … [Read more...] about Review on finding the average

## Geometry review

Geometry review 1.1. Geometry review Lesson 1 page 173: Observe the picture above, point out a) The sides are parallel to each other; b) The sides are perpendicular to each other. Solution guide: Observe the figure to find the sides are perpendicular to each other, the sides are parallel to each other. a) Side AB and side DC are parallel b) Side AB and … [Read more...] about Geometry review

## Quantitative practice

Quantitative practice 1.1. Quantitative practice Lesson 1 page 170: Write the correct number in the dot 1 nest = ... kg 1 quintal = ... oats 1 quintal = ... kg 1 ton = ... quintal 1 ton = ... kg 1 ton = ... oats Solution guide: Based on the table of units of measurement: 1 nest = 10 kg 1 quintal = 10 oats 1 quintal = 100kg 1 ton = 10 quintals 1 ton = … [Read more...] about Quantitative practice

## Ôn tập về các phép tính với phân số

Ôn tập về các phép tính với phân số 1.1. Ôn tập về các phép tính với phân số Bài 1 trang 167: Tính a) \(\frac{2}{7} + \frac{4}{7}\) ; \(\frac{6}{7} - \frac{2}{7}\) ; \(\frac{6}{7} - \frac{4}{7}\) ; \(\frac{4}{7} + \frac{2}{7}\) ; b) \(\frac{1}{3} + \frac{5}{{12}}\) ; \(\frac{9}{{12}} - \frac{1}{3}\) ; … [Read more...] about Ôn tập về các phép tính với phân số

## Practice on fractions

Practice on fractions Lesson 1: Choose a letter that has a right answer \(\frac{2}{5}\) is a fraction of the colored part of which shape ? A. Figure 1 B. Figure 2 C. Figure 3 D. Figure 4 Solution guide: Observe the figure and find the fraction of the shaded portion of each figure. Solution : The fraction indicating the shaded part of figure 1 is … [Read more...] about Practice on fractions

## Reviewing charts

Reviewing charts Lesson 1: Based on the chart below, answer the following questions THE NUMBER OF PICTURES OF THE FOUR CUTTING nests a) How many shapes can all four groups cut? How many triangles, squares and rectangles are there? b) How many squares more squares can Group 3 cut than Group 2, but how many rectangles less than Group 2? Solution guide: Observe … [Read more...] about Reviewing charts

## Review of natural numbers

Review of natural numbers 1.1. Review of natural numbers Lesson 1: Write according to the pattern Read number Write numbers Number includes Twenty-four thousand three hundred spirit eight 24 308 2 dozen look, 4 thousand, 3 hundred, 8 units One hundred and sixty thousand two hundred and … [Read more...] about Review of natural numbers

## Practice

Practice 1.1. Practice a) Measure the straight line on the ground To measure the length of a straight line (not too long) on the ground, people often use a tape measure. For example : Measure the length of line segment AB on the ground. We can do the following: Fix one end of the tape measure at point A so that the zero mark of the ruler coincides … [Read more...] about Practice