59
Rounding to the nearest ten
Textbook: Part 2, lesson 59, pp. 63–65
GoalRounding to the nearest ten.
New words
rounding · yaxlitlashten · o‘nlikones place · birlik xonasito the nearest ten · o‘nliklargacha
Explanation
To round to the nearest ten we look at the digit in the ones place. If it is 0, 1, 2, 3 or 4, the tens stay the same and the ones become 0: 243 ≈ 240. If it is 5, 6, 7, 8 or 9, the tens go up by 1: 68 ≈ 70, 385 ≈ 390, 1 995 ≈ 2 000. If the digit is 5, we also round up.
Worked examples
5 674 ≈ 5 670 (4 < 5, the tens stay).
1 995 ≈ 2 000 (the digit is 5, so round up).
Class activity
“Rounding line”: write 12 numbers; the partner circles the ones digit and writes the rounded number.
Practice
1
Round 68 to the nearest ten.
70
2
Round 243 to the nearest ten.
240
3
Round 1 995 to the nearest ten.
2 000
4
Round 5 674 to the nearest ten.
5 670