Estimate to the nearest ten

Learning Objectives Identify the two tens a number is between. Explain that estimating makes numbers simpler. Use the ones digit to decide whether to round up or down. Round a two-digit number to the nearest ten. Use a number line to show estimation. Say the 'rounding rule' for numbers ending in 1-4 and 5-9. Do you want to guess how many toys are in a big jar? 🤔 Let's learn a trick! We will learn how to make tricky numbers easy. This is called estimating. It helps us make a smart guess quickly. Real-World Applications Guessing how many candies are in a bowl 🍬 Telling a friend about how many minutes until lunch 🥪 Figuring out about how many stickers you have ✨ Counting about how many people are at the park 🌳

TermDefinitionExample EstimateTo make a smart guess that is close to the real answer. It's like saying 'about'.About 20 crayons 🖍️ instead of exactly 19 crayons. Nearest TenThe ten (like 10, 20, 30) that a number is closest to on a number line.The number 12 is closest to the ten '10'. Round UpTo change a number to the next, bigger ten. ⬆️We round the number 28 up to 30. Round DownTo change a number to the ten you just passed. ⬇️We round the number 43 down to 40. Ones PlaceThe very last digit in a number. It tells us how many single ones we have.In the number 27, the 7 is in the ones place. 🍓🍓🍓🍓🍓🍓🍓 Tens PlaceThe digit just before the ones place. It tells us how many groups of ten we have.In the number 27, the 2 is in the tens place. It means two groups of te...

The '4 or Less' Rule Ones digit is 1, 2, 3, 4 ➡️ Round Down If the ones digit is small, go back to the ten you just passed. Let it rest! 😴 The '5 or More' Rule Ones digit is 5, 6, 7, 8, 9 ➡️ Round Up If the ones digit is big, go up to the next ten. Soar to the score! 🦅