Vocabulary
place value
the value assigned to a digit based on its position in a number
What digit is in the ones place?
176,234
4
Round to the nearest tens place
127, 268
127,270
67 + 27 = ?
94
678 - 23 = ?
655
digit
a symbol used to write numbers
How many tens are there?
267,183
8
Round to the nearest hundreds place
728,277
728,300
267 + 189 = ?
456
3,986 - 12 = ?
3,974
estimate
to give an approximate number or answer based on mathematical thinking
12 tens = ?
120
Round to the nearest thousands place
627,938
628,000
1,208 + 1,379 = ?
2,587
2,789 - 127 = ?
2,662
regroup
to compose or decompose ones, tens, hundreds, thousands, and so forth
17 hundreds = ?
1,700
Round to the nearest ten thousands place
738,823
740,000
45,729 + 2,778 = ?
48,507
1,267 - 1,110 = ?
157
algorithm
a set of routine steps used to solve problems
52 thousands = ?
52,000
Round to the nearest hundred thousands place
216,927
238,197 + 268,923 = ?
507,120
129,198 - 17,370 =
111,828