1.
three digits
① A hundred, a few hundred
② Three-digit number
③ Place value of three-digit numbers
④ Jump and count
⑤ Comparison of numbers
2.
Various shapes
① Triangle
② Square
③ Won
④ Making shapes with a chalkboard
⑤ Learn the stacked shapes
⑥ Stacking in various shapes
3.
Addition and subtraction
① (two-digit number) + (one-digit number) with carry in the first digit
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 (two-digit number) + (two-digit number) with two carry-overs
⑤ (two-digit number)-(one-digit number) with borrowing
⑥ (dozens) with a down payment - (dozens and dozens)
⑦ (Two-digit number) with a downgrade - (Two-digit number)
⑧ Addition of three numbers
⑨ Subtraction of three numbers
⑩ Addition and subtraction of three numbers
⑪ Relationship between addition and subtraction
⑫ Finding the value of □ in the addition formula
⑬ Finding the value of □ in the subtraction formula
4.
Measuring length
① Measuring length in various units
② 1cm
③ Measure the length with a ruler
④ Express the length in cm
5.
Classify
① Classification
② Classify by criteria
③ Classify and count
④ Speaking the classified results
6.
multiplication
① Tie it together and count
② How many times how many
③ Multiplication formula

By learning with "Concept + Operation," you can perform calculations quickly and accurately through calculation secrets that help you calculate quickly and accurately, and you can complete your calculation skills by supplementing your insufficient skills with the "Clinic Book" that fills in your skills.
By learning with ‘Concept + Operation’, you can build a solid foundation in mathematics.