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Estimating and Rounding quiz
Estimating & Rounding QUIZ
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Slide 1:
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Mathematics
Primary Education
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Estimating & Rounding QUIZ
Slide 1 - Diapositive
Round this number to the nearest 10
76
A
75
B
70
C
80
D
66
Slide 2 - Quiz
Round this number to the nearest 10
83
A
80
B
83
C
90
D
88
Slide 3 - Quiz
Estimate this number to the nearest 100
567
A
456
B
600
C
500
D
700
Slide 4 - Quiz
Slide 5 - Diapositive
Round 235 to the nearest ten.
A
200
B
345
C
240
D
340
Slide 6 - Quiz
Round this number to the nearest 10
666
A
345
B
670
C
660
D
680
Slide 7 - Quiz
What is Rounding?
When a question asks you to round or estimate, you are being asked "about how many?"
Your approximate number will help you solve problems that maybe hard to solve.
Slide 8 - Diapositive
What to do?
When rounding to the nearest ten up to 100.
Your answer will be one of the numbers below because they are multiples ten.
0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100.
The rule to rounding 0, 1, 2, 3, 4 round down.
5, 6, 7, 9, 9 round up.
Slide 9 - Diapositive
Rounding poem
Remembering this poem with the rule will also help you round.
Find your number.
Look right next door.
4 or less just ignore.
5 or more, add 1 more.
Slide 10 - Diapositive
Using a number line
Remember the poem.
Round 36 to the nearest ten.
Put the circle around that number.
31
32
33
34
35
36
37
38
39
30
40
Slide 11 - Question de remorquage
Using a number line
Round 74 to the nearest ten.
Put the circle around that number.
71
72
73
74
75
76
77
78
79
70
80
71
72
73
74
75
76
77
78
79
70
Slide 12 - Question de remorquage
Your turn to try!
Slide 13 - Diapositive
Round 5 to the nearest ten.
1
2
3
4
5
6
7
8
9
0
10
A
0
B
10
C
6
D
20
Slide 14 - Quiz
Round 19 to the nearest ten.
11
12
13
14
15
16
17
18
19
10
20
A
20
B
10
C
19
D
11
Slide 15 - Quiz
Round 73 to the nearest ten.
71
72
73
74
75
76
77
78
79
70
80
A
70
B
75
C
80
D
85
Slide 16 - Quiz
Round 77 to the nearest ten.
71
72
73
74
75
76
77
78
79
70
80
A
70
B
75
C
80
D
85
Slide 17 - Quiz
Round 92 to the nearest ten.
91
92
93
94
95
96
97
98
99
90
100
A
90
B
95
C
97
D
100
Slide 18 - Quiz
Keep the poem in mind
The rule to rounding 0, 1, 2, 3, 4 round down.
5, 6, 7, 9, 9 round up.
Find your number.
Look right next door.
4 or less just ignore.
5 or more, add 1 more.
Slide 19 - Diapositive
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