Rounding
Round 62 to the Nearest 10
60
27 + 18 =
45
35 + 27 =
62
What is a number that ends in 0 called?
A friendly number
Round 15 to the Nearest 10
20
58 + 59 =
117
78 + 65 =
143
What do we call the value of a digit based on its position in the number?
Place Value
Round 321 to the Nearest Ten
320
127 + 56 =
183
138 + 27 =
165
What do we call the answer to an addition problem?
The sum.
Round 279 to the Nearest 10
280
276 + 138 =
414
372 + 275 =
647
What do you call the process of making a rough calculation or an informed guess about the size, cost, value, or quantity of something?
An estimation
Round 397 to the Nearest Hundred
400
892 + 778 =
1,670
927 + 478 =
1, 450
Name one real world example in which we would use estimation?
Budgeting!