September Math
In
the first unit of fourth grade, we will extend our work with whole numbers.
They begin with large numbers using familiar units (hundreds and
thousands) and develop our understanding of millions by building knowledge of
the pattern of times ten in the base ten system on the place value chart.
We recognize that each sequence of three digits is read as hundreds,
tens, and ones followed by the naming of the corresponding base thousand unit
(thousand, million, billion).
Some concepts we plan to
master are
- Place value of multi-digit whole numbers
- Comparing multi-digit whole numbers
- Rounding multi-digit whole numbers
- Multi-digit whole number addition
- Multi-digit whole number subtraction
- Multi-digit addition and subtraction word problems
·
In order to help your child at home,
please reinforce these terms and concepts with them:
- Sum (answer to an addition problem)
- Difference (answer to a subtraction problem)
- Rounding (approximating the value of a given number)
- Place value (the numerical value that a digit has by virtue of its position in a number)
- Digit (a numeral between 0 and 9)
- Standard form (a number written in the format: 135)
- Expanded form (e.g., 100 + 30 + 5 = 135)
- Word form (e.g., one hundred thirty-five)
- Tape diagram (bar diagram)
- Number line (a line marked with numbers at evenly spaced intervals)
- Bundling, making, renaming, changing, exchanging, regrouping, trading (e.g. exchanging 10 ones for 1 ten)
- Unbundling, breaking, renaming, changing, regrouping, trading (e.g. exchanging 1 ten for 10 ones)
- =, <, > (equal, less than, greater than)
- Number sentence (e.g., 4 + 3 = 7)
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