• Add numbers with any amount of digits, including with regrouping
• Subtract numbers with any amount of digits, including with borrowing
• Multiply by multiples of 10 mentally (6x40)
• Multiply by 1 and 2 digit numbers (traditional method preferred, not lattice)

Adding & Subtracting within 20

Adding & Subtracting 10s and 100s

Subtracting with Regrouping

Subtracting with Regrouping & Zeros

Multiplying Multiples of 10

Traditional Multiplication (2 Digit x 1 Digit)

Traditional Multiplication (3 Digit x 1 Digit)

Traditional Multiplication (4 Digit x 1 Digit)

Traditional Multiplication (2 Digit x 2 Digit)

Traditional Multiplication (3 Digit x 2 Digit)

Traditional Multiplication (4 Digit x 2 Digit)