Four-digit numbers 1.1. Four-digit numbers Number includes 1 thousand, 4 hundred, 2 tens, 3 units. Written as : 1423. Read as : One thousand four hundred twenty-three. 1.2. Four-digit numbers (continued) ROW WRITE NUMBERS READ MORE thousand hundred Dozen Unit 2 0 0 0 2000 two … [Read more...] about Four-digit numbers

## Rectangle, Square, Perimeter of Rectangle, Square

Rectangle, Square, Perimeter of Rectangle, Square 1.1. Rectangle Rectangle ABCD has : The four vertices A, B, C, and D are all right angles. 4 sides include: 2 long sides are AB and CD, 2 short sides are AD and BC. Two long sides have the same length, written as: AB = CD. The two short sides have the same length, written as: AD = BC. A … [Read more...] about Rectangle, Square, Perimeter of Rectangle, Square

## Get familiar with expressions + Find expression values

Get familiar with expressions + Find expression values 1.1. Get familiar with the expression 1.1.1. Example of the expression 126 + 51 ; 62 - 11 ; 13 x 3 ; 84 : 4 ; 125 + 10 - 4 ; 125 + 10 - 4 ; 45 : 5 + 7 ; ... are expressions. 1.1.2. The value of the expression 126 + 51 = 177. The value of the expression 126 + 51 is 177. 125 + 10 - 4 = 131. The … [Read more...] about Get familiar with expressions + Find expression values

## Introduction of the multiplication table

■Introduction of the multiplication table ■Introducing the multiplication table. ===== … [Read more...] about Introduction of the multiplication table

## 9 . division table

9 . division table Lesson 1: Mental arithmetic a) 9 × 6 = 9 × 7 = 9 × 8 = 9 × 9 = 54 : 9 = 63 : 9 = 72 : 9 = 81 : 9 = b) 18 : 9 = 27 : 9 = 36 : 9 = 45 : 9 = 18 : 2 = 27:3 = 36 : 4 = 45 : 5 = Solution guide: Mentally find the value of multiplication and division in the learned range and then fill in the results in the blanks. a) 9 × 6 = 54 9 × 7 = 63 9 × … [Read more...] about 9 . division table

## Gram Unit

Gram Unit 1.1. Knowledge to remember The gram is a unit of measurement for mass. Gram is abbreviated as g. 1000g = 1kg In addition to the 1kg, 2kg and 5kg weights, there are also weights: 1g, 2g, 5g 10g, 20g, 50g 100g, 200, 500g. 1.2. Solving Textbook Exercises Lesson 1: Solution guide: Read or calculate the total mass of the weights of the … [Read more...] about Gram Unit

## 9 . multiplication table

9 . multiplication table Lesson 1: Mental arithmetic a) 9 x 1 = 9 x 5 = 9 x 4 = 9 x 10 = 9 x 2 = 9 x 7 = 9 x 8 = 9 x 0 = 9 x 3 = 9 x 9 = 9 x 6 = 0 x 9 = b) 9 x 2 = 9 x 5 = 9 x 8 = 9 x 10 = 2 x 9 = 5 x 9 = 8 x 9 = 10 x 9 = Solution guide: Review the multiplication tables in the range learned and then fill in the results in the blanks. a) 9 x 1 = 9 9 … [Read more...] about 9 . multiplication table

## Compare small numbers by a fraction of large numbers

Compare small numbers by a fraction of large numbers 1.1. Knowledge to remember 1.1.1. For example The length of line segment CD is 3 times the length of line segment AB. We say that: Length of line segment AB is equal to \(\frac{1}{3}\) length of line segment CD. 1.1.2. Problem Mother is 30 years old, daughter is 6 years old. Ask how many times the age of … [Read more...] about Compare small numbers by a fraction of large numbers

## 8 . division table

8 . division table Lesson 1: Mental arithmetic a) 8 x 6 = 8 x 7 = 8 x 8 = 8 x 9 = 48 : 8 = 56 : 8 = 64 : 8 = 72 : 8 = b) 16 : 8 = 24 : 8 = 32 : 8 = 40 : 8 = 16 : 2 = 24 : 3 = 32 : 4 = 40 : 5 = Solution guide: Use what you have learned about multiplication and division tables within 8, mentally and then fill in the blanks with the appropriate number. a) 8 … [Read more...] about 8 . division table

## Compare how many times the larger number is than the smaller number

Compare how many times the larger number is than the smaller number 1.1. Knowledge to remember Problem: Line segment AB is 6cm long and line segment CD is 2cm long. How many times longer is the line segment AB than the line segment CD? Summary: Solution: The length of line segment AB is several times the length of line segment CD: 6: 2 = 3 (times) … [Read more...] about Compare how many times the larger number is than the smaller number