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    • ▾4th grade
      • ▾Place value of whole numbers
        • •Place value of multi-digit whole numbers
        • •Adding and subtracting multi-digit numbers
        • •Multiply and divide by 10
        • •Represent a number using base ten blocks, units, tens, and hundreds
        • •Convert between written forms of numbers
        • •Round whole numbers
        • •Estimating sums and differences by rounding
        • •Estimating products by rounding
      • ▸Multiplication and division
        • •Multiplying one-digit numbers by 10, 100, and 1000
        • •Multiplying one-digit numbers by multiples of 10, 100, and 1000
        • •Multiplying 10s
        • •Multiplication
        • •Quotients and remainders
        • •Pattern in the units digit of multiples
        • •Solve multiplication and division word problems
        • •Multi-step word problems
      • ▸Factors, multiples, and patterns
        • •Factors and multiples
        • •Divisibility tests
        • •Prime and composite numbers
        • •Number patterns
      • ▸Equivalent fractions and comparing fractions
        • •Equivalent fractions
        • •37 trick
        • •Compare fractions with unlike numerators, denominators, or both
      • ▸Fraction arithmetic
        • •Round fractions
        • •Add and subtract fractions with like denominators
        • •Add fractions with denominators of 10 or 100
        • •Multiply fractions by whole numbers
      • ▸Understand decimals
        • •Represent decimal numbers using base ten blocks
        • •Compare decimals to hundredths
      • ▸Geometry
        • •Intro to parallel and perpendicular lines
        • •Lines of symmetry
        • •Rotational symmetry
        • •Intro to angles
        • •Measuring and drawing angles
        • •Coterminal angles
        • •Naming angles
        • •Adjacent angles and the additive property of angles
      • ▸Units of measurement
        • •Converting larger units of volume to smaller ones
        • •Converting larger units of length to smaller ones
        • •Converting larger units of time to smaller ones
        • •Word problems involving measures
     › 4th grade › Place value of whole numbers

    Multiply and divide by 10

    First, students will learn how to multiply whole numbers by 10.

    Multiplying whole numbers by 10 by Khan Academy

    Multiply whole numbers by 10 by Khan Academy

    Next, students will learn how to divide whole numbers by 10.

    Dividing whole numbers by 10 by Khan Academy

    Divide whole numbers by 10 by Khan Academy

    After that, students will practice solving problems involving both multiplication and division by 10.

    Multiply and divide by 10 by Khan Academy

    Next, students will learn how to relate digits in different positions. For example, an 8 in the ones place has a value 10 times smaller than an 8 in the tens place. As another example, if we start with 1,632, then multiply by ten, the 3 will end up in the hundreds place.

    Watch these Khan Academy videos:

    • Understanding place value
    • Place value when multiplying and dividing by 10

    Place value when multiplying and dividing by 10 by Khan Academy

    Next, give your students this challenge:

    What's Happening? by NRICH

    Conclude by leading this investigation:

    Russian Map Reading
    by MathPickle

    4.NBT.A.1: Recognize that in a multi-digit whole number, a digit in one place represents ten times what it represents in the place to its right. For example, recognize that 700 ÷ 70 = 10 by applying concepts of place value and division.

    Additional lessons and practice problems