1.
three digits

① Baek
② A few hundred
③ Three-digit number
④ The value represented by each digit
⑤ Jump and count
⑥ Comparison of number sizes

2.
Various shapes

① Triangle
② Square
③ Won
④ Making shapes with a chalkboard
⑤ Learn the stacked shapes
⑥ Stack in various shapes

3.
Addition and subtraction

① Various calculation methods for (two-digit number) + (one-digit number) where the sum of the digits of the units is 10 or greater than 10.
② (two-digit number) + (two-digit number) with carry in the first digit
③ (two-digit number) + (two-digit number) with carry over from the tens place
④ Various calculation methods for (two-digit)-(one-digit) numbers where the digits of the units cannot be subtracted
⑤ (Dozens) with a down payment - (Dozens and dozens)
⑥ (Two-digit number) with a downgrade - (Two-digit number)
⑦ Calculation of three numbers
⑧ Expressing the relationship between addition and subtraction as a formula
⑨ Create an addition expression using □ and find the value of □
⑩ Create a subtraction equation using □ and find the value of □

4.
Measuring length

① How to compare lengths
② Measuring length in various units
③ 1cm
④ How to measure length with a ruler
⑤ Express the length in cm
⑥ Estimate the length

5.
Classify

① Classify
② Classify according to established criteria
③ Classify according to your own criteria
④ Classify and count
⑤ Speaking the classification results

6.
multiplication

① Counting in various ways
② Tie it up and count
③ Find out how many times how many
④ Expressing as a multiple of a number
⑤ Learn multiplication
⑥ Expressing as a multiplication formula

“Complete your basic skills with the type review system!”

What is the 'Type Review System'?
A system to master the types of questions by reviewing the problems in the [Concept Book] in the [Review Book].
[Concept Book] Learning concepts that are easy to understand at a glance and learning various types of problems.
[Review Book] Includes basic skills problems, [Concept Book] 1:1 review of problems
[Assessment Book] Includes unit assessments, descriptive assessments, and academic achievement assessments appropriate for the light level.

·『Concept + Type』is a math textbook with a type review system that helps you build a solid foundation of basic skills.

·『Concept + Type』 is composed of '30% lower, 50% middle, and 20% upper problems' and is good for completing the basics.