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Basic multiplication

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450
13:20

Number line 1

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471
01:19

The idea of division

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529
08:00

More on the concept of multiplication

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470
05:29

Multiplication as groups of objects

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485
04:18

Intro to multiplication

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467
03:32

Subtraction word problem

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527
05:08

Alternate mental subtraction method

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497
05:09

Regrouping (borrowing) twice example

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485
05:05

Borrowing once example 2

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499
04:27

Borrowing once example 1

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488
03:44

Regrouping from 0 when subtracting three digit numbers

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545
02:23

Regrouping twice when subtracting three digit numbers

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485
03:47

Regrouping when subtracting three digit numbers

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510
03:19

Basic regrouping or borrowing when subtracting three digit numbers

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511
02:46

Addition 4

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461
08:49

Examples of carrying when adding three digit numbers

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545
03:03

Why carrying works

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485
02:29

Carrying when adding three digit numbers

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466
02:25

Level 2 addition

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495
09:47