Multiply and Divide by 1 or 0 (multiply by zero is always zero: divide by zero is impossible!)
multiplication: 2 digit x 1 digit using number chains (including lattice method at 3:40)
Three figures multiplied by one figure - including repeated addition and also lattice method
Multiply: 2 figs x decimal - lattice method with repeated addition to support x tables - remove and replace decimal value
Multiply: 2 figs x decimal number: formal method with removal/addition of decimal place