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How do you round 64 to the nearest 10?
Will 64 round to 60 or 70?
In this lesson you will learn how to round to the nearest 10
by using base ten blocks.
Let’s ReviewLet’s Review
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 76 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100
Let’s ReviewLet’s Review
Base Ten Blocks
OnesTensHundredsThousands
Let’s ReviewLet’s Review
Thousands Hundreds Tens Ones
2 4 6 7
Let’s ReviewA Common Mistake
Knowing when to round up or round down.
It is important to consider the number size and the benchmark numbers when
rounding.
Let’s ReviewCore Lesson
Rounding - To find a number that is close to a given number.
My family drove 323 miles on
vacation.
We drove about 320 miles.
Let’s ReviewCore Lesson
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 76 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100
Numbers less than the midpoint round down.
Numbers the same as or greater than the midpoint round up.
Let’s ReviewCore Lesson
Round 51 to the nearest ten. 51 is between 50 and 60.
Let’s ReviewCore Lesson
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 76 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100
Let’s ReviewCore Lesson
Round 57 to the nearest ten.
Let’s ReviewCore Lesson
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 76 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100
Let’s ReviewCore Lesson
Round 485 to the nearest ten.
485 is between 480 and 490.
Let’s ReviewCore Lesson Round 485 to the nearest ten.
490
100 200 300
400
Let’s ReviewCore Lesson
Round 64 to the nearest 10
Now I have 6 groups of 10 and
0 ones.60
7064 – = 6064 + = 70
46
Let’s ReviewCore Lesson
368 Rounds Up to 370
368 – = 360368 + = 370
82
In this lesson you have learned how to round to the nearest 10
by using base ten blocks.
Let’s ReviewGuided Practice
1). Round 167 to the nearest ten.
2). Round 24 to the nearest ten.
Let’s ReviewExtension Activities
Prepare digit cards 0 – 9. Turn the cards over and select two digits to create a number.
Find this number on a hundreds chart and round to the nearest 10.
Let’s ReviewExtension Activities
Create the following numbers with base ten blocks. Round each number to the nearest 10.
78 345 852 124
Let’s ReviewQuick Quiz
1). Round 87 to the nearest 10.
2). Round 472 to the nearest 10.
