EC
Gr3-B5: Rounding to Nearest 100
ExpertChild
Name:
Date:
Start Time:
Grade:
Number of mistakes:
[1]
:
A+
0
End Time:
A
1
B
2-3
C
4-6
:
D
7+
Round 621, 650 and 674 to the nearest hundred.
•
621 is closer to 600 than
700. So, 621 rounds to 600.
•
674 is closer to 700 than
600. So, 674 rounds to 700.
•
621
650
674
♦
♦
♦
600
650
700
650 is halfway between 600 and 700. So, 650 rounds to the greater hundred,
i.e. 70.
621 rounds to 600
650 rounds to 700
674 rounds to 700
Math Concept
To round a number to the nearest hundred, look at the tens digit.
Rule 1: If the tens digit is less than 5 (i.e. 0, 1, 2, 3 or 4) do not change the
hundreds, and higher digits. Change the ones and tens digit to 0.
Rule 2: If the tens digit is 5 or greater than 5 (i.e. 5, 6, 7, 8 or 9), increase the
hundreds digit by 1. Thousands and higher digits remain same. The ones and
tens digit become 0.
Round the numbers to the nearest hundred.
[1]
678
Look at tens digit
tens digit is 7 , which is greater than 5 (so, increase the hundreds digit)
hundreds digit becomes 7 ; ones and tens digit become 0
678 rounds to 700
[2]
[3]
362
828
tens digit is
hundreds digit becomes
362 rounds to
; and ones and tens digit become
tens digit is
hundreds digit becomes
828 rounds to
; and ones and tens digit become
Copyright  2009 by ExpertChild Inc.
1
EC
ExpertChild
Gr3-B5: Rounding to Nearest 100
Round the numbers to the nearest hundred.
Note: Look at the tens digit first and decide the hundreds digit. The ones and tens digits
always become 0.
[1]
324 rounds to 300
[13]
57 rounds to
[2]
679 rounds to 700
[14]
148 rounds to
[3]
489 rounds to
[15]
286 rounds to
[4]
227 rounds to
[16]
289 rounds to
[5]
372 rounds to
[17]
137 rounds to
[6]
828 rounds to
[18]
258 rounds to
[7]
588 rounds to
[19]
482 rounds to
[8]
912 rounds to
[20]
770 rounds to
[9]
578 rounds to
[21]
140 rounds to
[10]
358 rounds to
[22]
309 rounds to
[11]
757 rounds to
[23]
235 rounds to
[12]
408 rounds to
[24]
853 rounds to
Copyright  2009 by ExpertChild Inc.
2
EC
ExpertChild
Gr3-B5: Rounding to Nearest 100
Round the numbers to the nearest hundred.
Note: Look at the tens digit first and decide the hundreds digit. The ones and tens digits
always become 0.
[1]
5,362
Look at tens digit
tens digit is 6 , which is greater than 5 (so, increase the hundreds digit)
hundreds digit becomes 4 ; ones and tens digit become 0
5,362 rounds to 5,400
[2]
46,347 Look at tens digit
tens digit is 4 , which is less than 5 (so, don’t change the hundreds digit)
hundreds digit remains 3 ; and tens and ones digit become 0
46,347 rounds to 46,300
[3]
2,309 rounds to
[12]
42 rounds to
[4]
1,648 rounds to
[13]
299 rounds to
[5]
1,223 rounds to
[14]
2,202 rounds to
[6]
10,276 rounds to
[15]
2,256 rounds to
[7]
14,235 rounds to
[16]
229 rounds to
[8]
248 rounds to
[17]
2,225 rounds to
[9]
6,392 rounds to
[18]
17,212 rounds to
[10]
69,205 rounds to
[19]
226 rounds to
[11]
23,245 rounds to
[20]
3,207 rounds to
Copyright  2009 by ExpertChild Inc.
3
EC
ExpertChild
Gr3-B5: Rounding to Nearest 100
Round the numbers to the nearest hundred.
Note: Look at the tens digit first and decide the hundreds digit. The ones and tens digits
always become 0.
[1]
2,354 rounds to
[13]
94 rounds to
[2]
1,649 rounds to
[14]
117 rounds to
[3]
5,262 rounds to
[15]
2,209 rounds to
[4]
10,248 rounds to
[16]
2,217 rounds to
[5]
14,232 rounds to
[17]
233 rounds to
[6]
296 rounds to
[18]
2,217 rounds to
[7]
6,377 rounds to
[19]
17,248 rounds to
[8]
69,237 rounds to
[20]
317 rounds to
[9]
23,241 rounds to
[21]
3,209 rounds to
[10]
418 rounds to
[22]
248 rounds to
[11]
246 rounds to
[23]
4,299 rounds to
[12]
6,257 rounds to
[24]
253 rounds to
Copyright  2009 by ExpertChild Inc.
4
EC
Gr3-B5: Rounding to Nearest 100
ExpertChild
Mixed Review
(Multiply 1-digit Numbers)
Multiply.
[1]
6×5=
[11]
7×6=
[2]
6×4=
[12]
7×7=
[3]
3×6=
[13]
7×8=
[4]
6×2=
[14]
7×9=
[5]
1×6=
[15]
1×8=
[6]
7×1=
[16]
8×2=
[7]
2×7=
[17]
3×8=
[8]
3×7=
[18]
4×8=
[9]
4×7=
[19]
5×8=
[10]
7×5=
[20]
8×6=
Copyright  2009 by ExpertChild Inc.
5
EC
Gr3-B5: Rounding to Nearest 100
ExpertChild
Problem Solving
(Too Much/Too Little Information)
Circle (a) if you don’t have enough information to solve the problem.
Circle (b) if you have more information than you need.
Circle (c) if you have just enough information to solve the problem.
[1]
The class teacher has 25 pencils and 10 erasers. He gave
12 pencils to his students. How many pencils does he have
left?
Hints: 10 erasers are not required to solve this problem. So, we have too much
information. Circle (b).
(a) too little information
(b) too much information
(c) the right amount of information.
Answer: ______
[2]
Mr. Gates wants to buy a juice bottle. How much money
does he need to buy the juice bottle?
(a) too little information
(b) too much information
(c) the right amount of information.
Answer: ______
[3]
Rita has to read 50 pages in a day for his reading
assignment. He has finished 37 pages. How many more
pages does she need to solve?
(a) too little information
(b) too much information
(c) the right amount of information.
Answer: ______ pages
Copyright  2009 by ExpertChild Inc.
6