Click here for the Spanish version: https://youtu.be/R5UWyDN68ko
In This Unit of Study…
Fourth-grade students continue to use number lines to round, but experience with place value and number sense allows them to generalize the process of rounding numbers. This leads to being able to round much larger numbers and to round to digits other than the leading digit. For example, to round 5,397 to the nearest 10, the tens place changes from 90 to 100, and this affects the resulting digits in the ones, tens, and hundreds places. Students begin to develop efficiency rules for rounding numbers by thinking about the proximity of a benchmark number in relation to a midpoint set between two compatible numbers. Students recognize that rounding is a tool for estimation while solving problems. Fourth-grade students round multi-digit numbers up to 10,000 efficiently and appropriately, both in and out of the context of a word problem.
B.E.S.T. Benchmarks:
- MA.4.NSO.1.4 Round whole numbers from 0 to 10,000 to the nearest 10, 100 or 1,000.
- MA.4.NSO.2.1 Recall multiplication facts with factors up to 12 and related division facts with automaticity.
Overarching Key Concepts:
- Fluecny: Use doubles to multiply by 2, 4, and 8
- Round whole numbers 0 to 10,000