The lesson explicitly teaches rounding to the nearest ten and hundred by instructing students to look at the ones digit when rounding to ten and the tens digit when rounding to hundred, with examples such as 372 → 370 and 678 → 680. Students use number lines and the Rocket Rounding web game to determine which multiple of ten or hundred a number is closest to and to practice applying the rules. The lesson has guided practice (e.g., rounding 65, 343, 589, 165, 240, 599) and independent practice sheets and tables where students round a variety of whole numbers to the nearest 10 and 100. The lesson also has activities showing cascading changes when rounding (e.g., 6995 → 7000) so students see how place values shift.

Students are asked in the Introduction to round specific whole numbers aloud to the nearest 100 (e.g., 779→800, 603→600, 92→100, 42→0). Activity 1 explicitly instructs students to round numbers to the nearest 10, match exact sentences with rounded sentences, and provide estimated answers; the provided answer key shows rounded sentences (e.g., 76+22 → 80+20) and estimated results. The Wrapping Up examples ask students to round to the nearest ten to compare which sum is greater and to explain their reasoning, reinforcing use of rounding for estimation and checking reasonableness.

Students are asked in the Introduction to round each addend to the nearest hundred and then add them, and Activity 1 Step 6 explicitly directs students to "Use rounding to estimate the sum. Round to the nearest 10." The student pages and the abacus activity include problems where students record rounded versions (e.g., 2480 + 5750 under 2482 + 5753) and use expanded form and base-10 cards to represent place values (4235 = 4000 + 200 + 30 + 5). Multiple tasks require students to estimate sums by rounding to the nearest 10 or 100 and to use place-value tools (place-value cards, base-10 blocks, abacus) when performing rounding and estimation.

Students are asked in the Introduction to round 7,835 to the nearest 10 (7,840) and to the nearest 100 (7,800). In the Unit Review students write 2,538 in expanded form and explicitly write it rounded to the nearest 10 (2,540) and nearest 100 (2,500). The Unit Test / Student Activity Page contains a table with columns "Round to 10" and "Round to 100" for numbers (e.g., 2,547; 7,813; 6,992; 3,442) and also includes estimation problems that require rounding sums and differences to the nearest 10 or 100.

Students are explicitly asked in the Skills list to "use place value understanding to round whole numbers to the nearest 10 or 100." In Step 6 students create 40 "Math Challenge" cards, including 10 rounding cards with an example question: "What number do you get when you round 6591 to the nearest 10?" Students write answers for each Math Challenge card on the "Math Challenge Answers" sheet and are instructed to have answers checked for accuracy.

Students complete the "Basic Skills Review #7" sheet which explicitly asks them to "Round 2459 to the nearest 10 and 100" and provides the answers (2460, 2500). The lesson instructs students to use scratch paper and their Interactive Notebook while completing the Basic Skills Review, indicating that students will work on that rounding problem as part of the activities.

The Basic Skills Review #8 student activity includes a rounding problem: "Round 4682 to the nearest 10 and 100" with answers given (4680, 4700). Students are instructed to complete the Basic Skills Review sheet using scratch paper and may refer to their Interactive Notebook as needed, indicating students will attempt the rounding problem as part of that review. The rounding item appears among other arithmetic and measurement problems on the same worksheet.

The Basic Skills Review #9 explicitly asks students to round 5871 to the nearest 10 and 100 and provides the answers (5870, 5900). The review page lists a variety of arithmetic and number tasks that include that single rounding item among other skills. No other section of the lesson provides further rounding examples or practice problems.

Students are asked to round 1234 to the nearest 10 and 100 on the Basic Skills Review #10 student page. The answer key explicitly gives the rounded results (1230 and 1200). The rounding item appears among the student practice questions, so students will complete at least one rounding exercise.

Students complete the "Basic Skills Review #11" sheet that includes the question: "Round 4572 to the nearest 10 and 100," with the answer key showing 4570 and 4600. This rounding item is presented as part of Activity 4 and students are given scratch paper to work out the problem. The review sheet requires students to produce rounded whole-number results for both the nearest ten and nearest hundred.

The Basic Skills Review #12 includes item 5 asking students to "Round 7893 to the nearest 10 and 100." The answer key shows the rounded results (7890 and 7900). The worksheet descriptions state it contains problems involving rounding numbers, indicating at least one explicit rounding task for students.

The Basic Skills Review #13 includes a problem that explicitly asks students to "Round 1592 to the nearest 10 and 100," and the answer key gives 1590 and 1600. The review worksheet provides the single rounding item among other arithmetic problems, indicating students will be asked to produce rounded values for whole numbers to the nearest ten and hundred.

The Basic Skills Review #14 section asks students to round the number 3086 to the nearest 10 and the nearest 100 and provides the answers (3090 and 3100). This explicit item requires students to produce rounded whole-number results to both place-value targets. The problem appears among student-facing practice problems that students complete on the worksheet.

The Skills section explicitly lists "Use place value understanding to round whole numbers to the nearest 10 or 100." In the Introduction students are asked to round 436 to the nearest 10 (explaining that the ones place 6 causes the tens to round up to 440) and then to round 436 to the nearest 100 (noting the tens place 3 means the hundreds place stays 400). The lesson then gives students a linked interactive game to practice rounding to the nearest 10 and 100.