Rounding numbers to the nearest 10 and 100 worksheet for educational practice.

Let’s solve this step by step.

We have two parts:
1. Round numbers to the nearest 10
2. Round numbers to the nearest 100

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Part 1: Round to the nearest 10

Rule: Look at the ones digit.
- If it’s 5 or more → round up the tens digit.
- If it’s less than 5 → keep the tens digit, change ones to 0.

Let’s go one by one:

1) 27 → ones digit is 7 → round up → 30
2) 42 → ones digit is 2 → round down → 40
3) 154 → ones digit is 4 → round down → 150
4) 76 → ones digit is 6 → round up → 80
5) 35 → ones digit is 5 → round up → 40
6) 123 → ones digit is 3 → round down → 120
7) 98 → ones digit is 8 → round up → 100
8) 119 → ones digit is 9 → round up → 120
9) 137 → ones digit is 7 → round up → 140
10) 241 → ones digit is 1 → round down → 240
11) 385 → ones digit is 5 → round up → 390
12) 183 → ones digit is 3 → round down → 180
13) 466 → ones digit is 6 → round up → 470
14) 760 → already ends in 0 → 760
15) 394 → ones digit is 4 → round down → 390
16) 637 → ones digit is 7 → round up → 640
17) 444 → ones digit is 4 → round down → 440
18) 15 → ones digit is 5 → round up → 20
19) 103 → ones digit is 3 → round down → 100
20) 917 → ones digit is 7 → round up → 920
21) 796 → ones digit is 6 → round up → 800

✔ All checked.

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Part 2: Round to the nearest 100

Rule: Look at the tens digit.
- If it’s 5 or more → round up the hundreds digit.
- If it’s less than 5 → keep the hundreds digit, change tens and ones to 0.

Let’s go one by one:

1) 243 → tens digit is 4 → round down → 200
2) 184 → tens digit is 8 → round up → 200
3) 266 → tens digit is 6 → round up → 300
4) 873 → tens digit is 7 → round up → 900
5) 327 → tens digit is 2 → round down → 300
6) 109 → tens digit is 0 → round down → 100
7) 358 → tens digit is 5 → round up → 400
8) 772 → tens digit is 7 → round up → 800
9) 536 → tens digit is 3 → round down → 500
10) 82 → tens digit is 8 → round up → 100 (since 82 is between 0 and 100, rounding to nearest 100)
11) 916 → tens digit is 1 → round down → 900
12) 447 → tens digit is 4 → round down → 400
13) 752 → tens digit is 5 → round up → 800
14) 707 → tens digit is 0 → round down → 700
15) 364 → tens digit is 6 → round up → 400
16) 436 → tens digit is 3 → round down → 400
17) 750 → tens digit is 5 → round up → 800
18) 347 → tens digit is 4 → round down → 300
19) 782 → tens digit is 8 → round up → 800
20) 158 → tens digit is 5 → round up → 200
21) 954 → tens digit is 5 → round up → 1000

✔ All checked.

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Final Answer:

Round to nearest 10:
1) 30
2) 40
3) 150
4) 80
5) 40
6) 120
7) 100
8) 120
9) 140
10) 240
11) 390
12) 180
13) 470
14) 760
15) 390
16) 640
17) 440
18) 20
19) 100
20) 920
21) 800

Round to nearest 100:
1) 200
2) 200
3) 300
4) 900
5) 300
6) 100
7) 400
8) 800
9) 500
10) 100
11) 900
12) 400
13) 800
14) 700
15) 400
16) 400
17) 800
18) 300
19) 800
20) 200
21) 1000