Thirteen, fourteen, fifteen
1.1. Knowledge to remember
– Recognize that each number 13, 14, 15 consists of a tens and a unit number 3, 4, 5
+) Number 13 includes 1 tens and 3 units.
+) Number 14 includes 1 tens and 4 units
+) Number 15 includes 1 tens and 5 units.
– Read and write numbers within 15
1.2. Mathematical forms about Thirteen, fourteen, fifteen
Form 1: Count the pictures and write the corresponding number.
– Count the number of given images and write the corresponding number.
+) 1 dozen add 3 units to make 13.
+) 1 dozen add 4 units to make 14.
+) 1 dozen add 5 units to make 15.
Form 2: Fill in the appropriate number in the number line.
I determine the distances divided on the number line, equidistant from several units and then count and fill in the corresponding numbers.
Form 3: Numbers before, numbers after.
– The preceding digit of a number is the number immediately preceding that number and is 1 unit less than that number.
– The next digit of a number is the number immediately after that number and is 1 unit more than that number.
1.3. Solving Textbook Exercises
Lesson 1 page 103
a) Ten, eleven, twelve, thirteen, fourteen, fifteen.
– Write numbers from the given number readings.
– Count the numbers forward from 10 to 15 and vice versa and then fill in the missing number in the blank.
a) 10, 11, 12, 13, 14, 15.
Lesson 2 page 104
Fill in the blanks with the correct number:
Count the stars in the picture and fill in the blanks with the correct number.
Lesson 3 page 104
Match each picture with an appropriate number (follow the pattern):
Count the number of animals in each picture and then match the box with the appropriate number.
Lesson 4 page 104
Enter a number under each line of the number line:
Count the numbers from 0 to 15 and then fill in the missing number in the blank.