Rounding to the Nearest Ten & Hundred

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Presentation transcript:

Rounding to the Nearest Ten & Hundred MAFS.3.NBT.1.1

Lesson Opening Write the correct number under each tick mark on the number lines below. 83 66

Lesson Opening Write the correct number under each tick mark on the number lines below. 80 81 82 83 84 85 86 87 88 89 90 60 61 62 63 64 65 66 67 68 69 70

Round to the Nearest Ten 83 is closer to 80 than it is to 90, so 83 rounded to the nearest ten is 80. The purple numbers are closest to which TEN (multiple of ten)? 66 is closer to 70 than it is to 60, so 66 rounded to the nearest ten is 70. 80 81 82 83 84 85 86 87 88 89 90 60 61 62 63 64 65 66 67 68 69 70

Round to the Nearest Ten Fill out this number line. 480 481 482 483 484 485 486 487 488 489 490

Round to the Nearest Ten Which TEN (multiple of ten) is 483 closer to? 483 is closer to 480 than it is to 490, so 483 rounded to the nearest ten is 480. 480 481 482 483 484 485 486 487 488 489 490

What’s the difference in rounding to the nearest ten in the numbers below? 480 481 482 483 484 485 486 487 488 489 490 80 81 82 83 84 85 86 87 88 89 90

Round to the Nearest Ten Fill out this number line. 760 761 762 763 764 765 766 767 768 769 770

Round to the Nearest Ten Which TEN (multiple of ten) is 766 closer to? 760 761 762 763 764 765 766 767 768 769 770

What’s the difference in rounding to the nearest ten in the numbers below? 760 761 762 769 770 763 764 765 766 767 768 60 61 62 63 64 65 66 67 68 69 70

Rounding to the nearest HUNDRED The number 483 is between which two HUNDREDS? 400 500 483 483 is closer to 500 than it is to 400, so 483 rounded to the nearest HUNDRED is 500.

Color the paper as it tells you. Cut out each ROW. Glue the rows together to make a number line that counts by tens.

459 Rounding Game Take a digit card (1-9) Find 2 other people and create a three-digit number. Write that number in the first column. Then use your rounding tape to round to the nearest hundred. Then round the same number to the nearest ten. Find 2 new people, create a new three-digit number and repeat steps 3-5. 459 400 459 500 450 459 460

Exit Ticket Complete the table then answer the question. Rounded to the Nearest Hundred Rounded to the Nearest Ten 489 492 496 503 505 Which numbers round to the SAME NUMBER when rounded to the nearest HUNDRED and TEN? 489 492 496 503 505