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Basic multiplication

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495
13:20

Number line 1

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516
01:19

The idea of division

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578
08:00

More on the concept of multiplication

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523
05:29

Multiplication as groups of objects

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530
04:18

Intro to multiplication

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519
03:32

Subtraction word problem

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582
05:08

Alternate mental subtraction method

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547
05:09

Regrouping (borrowing) twice example

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534
05:05

Borrowing once example 2

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548
04:27

Borrowing once example 1

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530
03:44

Regrouping from 0 when subtracting three digit numbers

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590
02:23

Regrouping twice when subtracting three digit numbers

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531
03:47

Regrouping when subtracting three digit numbers

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556
03:19

Basic regrouping or borrowing when subtracting three digit numbers

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555
02:46

Addition 4

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513
08:49

Examples of carrying when adding three digit numbers

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591
03:03

Why carrying works

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533
02:29

Carrying when adding three digit numbers

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510
02:25

Level 2 addition

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539
09:47