可汗学院数学4年级预备课程 - 小学4年级 - 在线视频课堂

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可汗学院数学4年级预备课程 - 小学4年级

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免费可汗学院数学4年级预备课程 - 小学4年级原版无字幕无翻译

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免费 Place value blocks (04:20)

免费 Place value tables (00:00)

免费 Number and word form of a number (00:00)

免费 Going from word form to expanded form (00:00)

免费 Regrouping whole numbers (00:00)

免费 Rounding to the nearest 10 (00:00)

免费 Rounding to the nearest 100 (00:00)

免费 Examples rounding to the nearest 10 and 100 (00:00)

免费 Breaking apart 3-digit addition problems (00:00)

免费 Addition using groups of 10 and 100 (00:00)

免费 Subtraction by breaking apart (00:00)

免费 Methods for subracting 3 digit numbers (00:00)

免费 Adding three-digit numbers (00:00)

免费 Adding: why carrying works (00:00)

免费 Adding three digit numbers with regrouping (00:00)

免费 Subtracting: three digit numbers and basic regrouping (00:00)

免费 Subtracting: three digit numbers and regrouping (00:00)

免费 Subtracting: Regrouping from zero (00:00)

免费 Introduction to multiplication (00:00)

免费 Multiplication as repeated addition (00:00)

免费 Multiplication on the number line (00:00)

免费 Intro to multiplication (00:00)

免费 More on the concept of multiplication (00:00)

免费 Multiplication as groups of objects (00:00)

免费 Order when multiplying commutative property of multiplication (00:00)

免费 Associative property of multiplication (00:00)

免费 Order doesn_t matter when purely multiplying (00:00)

免费 Using the distributive property when multiplying (00:00)

免费 Properties and patterns for multiplication (00:00)

免费 Division as equal groupings (00:00)

免费 Visualizing division with arrays (00:00)

免费 Examples relating multiplication to division (00:00)

免费 Fraction basics (00:00)

免费 Cutting shapes into equal parts (00:00)

免费 Fractions in context (00:00)

免费 Numerator and denominator of a fraction (00:00)

免费 More than one equal section (00:00)

免费 Recognizing fractions greater than 1 (00:00)

免费 Relating number lines to fraction bars (00:00)

免费 Fractions on a number line (00:00)

免费 Fractions on the number line widget (00:00)

免费 Finding 1 on the number line (00:00)

免费 Fractions greater than 1 on the number line (00:00)

免费 Different ways to represent 1 as a fraction (00:00)

免费 Relating fractions to 1 (00:00)

免费 Whole numbers as fractions (00:00)

免费 Writing whole numbers as fractions (00:00)

免费 Comparing fractions with greater than and less than symbols (00:00)

免费 Comparing fractions visually and on number line (00:00)

免费 Comparing fractions with the same denominator (00:00)

免费 Comparing unit fractions (00:00)

免费 Comparing fractions with same numerator (00:00)

免费 Equivalent fractions with visuals (00:00)

免费 Equivalent fraction models (00:00)

免费 Equivalent fractions visually and on number line (00:00)

免费 Generating equivalent fractions (00:00)

免费 Introduction to types of quadrilaterals (00:00)

免费 Rectangle area as product of dimensions same as counting unit squares (00:00)

免费 Transitioning from counting to multiplying to find area (00:00)

免费 Rectangle area as product of dimensions same as counting unit squares (05:20)

免费 Finding missing side when given area (00:00)

免费 Introduction to perimeter (00:00)

免费 Perimeter of a shape (00:00)

免费 Finding perimeter when a side length is missing (00:00)

免费 Finding missing side length when given perimeter (00:00)

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