Description Level F Learning Objectives Building on the mental math skills developed in Level E, this level focuses on mastering written calculation through vertical addition and subtraction practice. Book (Volume/Month) - Week (Session) - Learning Content Book F1, Weeks 1-4: Addition up to 99 (vertical form) - Two-digit number + one-digit number (no carrying) - Two-digit number + two-digit number (no carrying) - Two-digit number + one-digit number (with carrying) - Two-digit number + two-digit number (with carrying) Achievement Test Book F2, Weeks 1-4: Addition of two-digit numbers - Addition with carrying in the tens place Comprehensive review of two-digit addition Achievement Test Book F3, Weeks 1-4: Addition of three-digit numbers - Three-digit number + one-digit number, three-digit number + two-digit number - Three-digit number + three-digit number Comprehensive review of three-digit addition Addition of four-digit numbers - Four-digit number + one-digit number, + two-digit number, + three-digit number, + four-digit number Comprehensive review of four-digit addition Achievement Test Book F4, Weeks 1-4: Subtraction of one-digit numbers (vertical form) Subtraction of two-digit numbers - Two-digit number - one-digit number (no borrowing) - Two-digit number - two-digit number (no borrowing) - Two-digit number - one-digit number (with borrowing) - Two-digit number - two-digit number (with borrowing) Comprehensive review of two-digit subtraction Achievement Test Book F5, Weeks 1-4: Subtraction of three-digit numbers - Three-digit number - one-digit number, three-digit number - two-digit number - Three-digit number - three-digit number Subtraction of four-digit numbers - Four-digit number - one-digit number, - two-digit number - Four-digit number - three-digit number, - four-digit number Comprehensive review of three- and four-digit subtraction Final Test