Number Bonds To 100. Adding What Number Makes 100?
You will find more worksheets listed under these headings:
You will find more worksheets listed under these headings:
 Note: The Information above this point will not be sent to your printer 
Look at the 4 steps in the example below and then try the questions that follow. 



Follow the steps shown above and mark the 'jumps' and numbers on the number lines to help find the missing number. The first one is done. 

27 + 73 = 100 
66 + 34 = 100

 Page Break
Follow the examples and steps on page 1 to answer these questions: 

35 + 65 = 100

26 + 74 = 100

79 + 21 = 100

87 + 13 = 100

18 + 82 = 100

67 + 33 = 100

38 + 62 = 100

45 + 55 = 100

 Page Break
Follow the examples and steps on page 1 to answer these questions: 

56 + 44 = 100

77 + 23 = 100

29 + 71 = 100

48 + 52 = 100

Answer these questions. Try to picture a number line and the steps in your mind to help. 

76 + 24 = 100 
86 + 14 = 100 
36 + 64 = 100 
17 + 83 = 100 
27 + 73 = 100 
47 + 53 = 100 
75 + 25 = 100 
85 + 15 = 100 
 Note: The Information below this point will not be sent to your printer 
The various resources listed below are aligned to the same standard, (2NBT05) taken from the CCSM (Common Core Standards For Mathematics) as the Addition and subtraction Worksheet shown above.
Fluently add and subtract within 100 using strategies based on place value, properties ...
Similar to the above listing, the resources below are aligned to related standards in the Common Core For Mathematics that together support the following learning outcome:
Use place value understanding and properties of operations to add and subtract