1) Sum of consecutive numbers — Extension
2) Subtraction from a base (without borrowing) — Extension
1) Bar number — Extension
2) General subtraction without borrowing
1) Doubling and halving
2) Multiplication from a base
1) Multiplying (dividing) by 5, 25, 50
2) Multiplying by 11 (2 or more digits)
3) Multiplying by 101
1) 2 by 2 digits
2) 3 by 3 digits
1) Short division
2) Divide by factors
1) Special squaring
a) Squaring numbers near 50
b) Squaring numbers that end in 5
2) General squaring
3) Square roots of perfect squares
1) Cube roots of perfect cubes
2) Cubes
1) Compare and order fractions
2) Adding and subtracting fractions
1) Percentages
2) Estimation
