Understanding Numbers: Partitioning two-digit numbers

1. Why do we break numbers into tens and ones? Choose a two-digit number and explain how partitioning it helps you understand ...

Understanding Numbers: Reading and naming numerals

1. Where can you find numbers in your everyday environment? Look around your classroom or home and point out five places ...
PBS

Add 2-Digit Numbers

(dramatic orchestral music) (air swooshes) (magic chimes) (Springling boinging) (Dotsan screaming) - [Kids] Math Mights. - Welcome Math Mights, Mrs. Markovich here, and we've got a whole lot of fun ...
PBS

Subtract a 1-Digit from a 2-Digit Number

Decompose numbers to subtract. Engage in a Number Talk focused on subtraction strategies. Decompose numbers to subtract. Engage in a Number Talk focused on subtraction strategies. Can you solve the ...
BBC

How do I multiply two-digit numbers more easily?

19 is only 1 away from 20, so you prefer to start by multiplying 20 times 5, which equals 100. Then we need to take away a squadron of 5, because there are actually only 19 squadrons, not 20. 100 take ...