Numbers
 Practice mental math methods.  Fill in the sums.

 

3 + 7 + 5 + 6 + 9 =
 
9 + 5 + 1 + 1 + 9 =
 
13 + 1 + 7 + 2 =
 
21 + 4 + 10 + 10 =
 
19 + 5 + 1 + 5 =
 
8 + 1 + 10 + 9 =
 
7 + 5 + 4 + 4 = 
 
6 + 6 + 6 + 2 = 
 
11 + 4 + 4 + 2 =
 
12 + 7 + 1 =
 
14 + 5 + 6 + 2 + 3 =
 
9 + 6 + 6 + 9 =
 
13 + 10 + 2 =
 
1 + 9 + 22 =
 
5 + 15 + 15 =

 

Practice estimating the sum.  Fill in the boxes.

37 Rounds to spacer.gif (42 bytes) 17 Rounds to
+  22 Rounds to +  42 Rounds to

spacer.gif (42 bytes)
56 Rounds to 28 Rounds to
+  22 Rounds to +  51 Rounds to
spacer.gif (42 bytes)
81 Rounds to 68 Rounds to
+  11 Rounds to +  19 Rounds to
spacer.gif (42 bytes)
23 Rounds to 38 Rounds to
+  39 Rounds to +  51 Rounds to
spacer.gif (42 bytes)
27 Rounds to 38 Rounds to
+  57 Rounds to +  14 Rounds to

 

Practice estimating the difference with two-digit and three-digit numbers.

 

68 Rounds to spacer.gif (42 bytes) 53 Rounds to
-  31 Rounds to -  27 Rounds to
spacer.gif (42 bytes)
479 Rounds to 342 Rounds to
-  169 Rounds to -  199 Rounds to
spacer.gif (42 bytes)
82 Rounds to 48 Rounds to
-  33 Rounds to -  17 Rounds to
spacer.gif (42 bytes)
274 Rounds to 669 Rounds to
-  113 Rounds to -  321 Rounds to
spacer.gif (42 bytes)
27 Rounds to 93 Rounds to
-  13 Rounds to -  38 Rounds to
spacer.gif (42 bytes)
527 Rounds to 817 Rounds to
-  210 Rounds to -  199 Rounds to
spacer.gif (42 bytes)
39 Rounds to 73 Rounds to
-  27 Rounds to -  19 Rounds to

 

 

Elementary & Middle School Lessons & Self-Correcting Tests for Children in all Subject Areas.
If you have found an error or would like to make comments on this lesson, please email us at:
MySchoolhouse.online@gmail.com

Copyright 1999-2024 by Educational Designers, LLC.  All rights reserved.
Lessons & Tests in Math, Reading, Spelling, Science, Language, and Social Studies.

"This site uses cookies from Google to deliver its services and analyze traffic. Your IP address and user-agent are shared with Google along with performance and security metrics to ensure quality of service, generate usage statistics, and to detect and address abuse."
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
WORK SPACE