Adding and subtracting by using the strategy of bridging 100 helps to develop strong mental math skills by breaking down numbers into smaller more manageable parts.
Students get to visualize the connection between place values of digits in a number and understand the concept of regrouping or carrying over and can be of particular benefit to visual learners.
It also provides students with an alternative approach to addition and subtraction rather than relying on the standard algorithm every time.
Addition by bridging through 100 up to 1000 Worksheets 1 & 2 contain visual support to help introduce this topic.
Set 1
First addend: Multiples of ten between 100 to 900
Second addend: Multiple of 10 between 90
Set 2
First addend: Multiples of ten between 100 to 900
Second addend: Between 11 and 99
Sets 3 & 4 follow the same range of numbers as above but the pupils can now choose how they lay out their workings to demonstrate their understanding of addition through bridging.
Subtraction by bridging through 100 up to 1000
Set 1 contains visual support to help introduce this topic.
First number: A multiple of ten between 100 to 900
Second number: A multiple of 10 between 90
Set 2
These follow the same range of numbers as above but the pupils can now choose how they lay out their workings to demonstrate their understanding of subtraction through bridging.
Set 3 – Subtract by bridging through 10 and 100
Having successfully mastered the initial stage of bridging 100, we now add in an additional step of bridging 10 with the 2nd number now being any number in the range from 11 to 99. This set contains the visual support as in Set 1
Set 4
This follows the same question format of Worksheet Set 3, but the pupils can now choose how they lay out their workings to demonstrate their understanding of subtraction through bridging.
How many worksheets are there ?
At the click of a button all the numbers are randomised providing you with (an almost) unlimited set of questions for classwork, revision, homework, assessments etc.
Solutions are automatically generated every time for all Worksheets,
There are also Teaching Pages using the graphic layout for both the Addition and Subtraction
These are designed for use with the Interactive whiteboard for whole class teaching or on a PC or Mac for one-to-one tuition to help you introduce the content of the worksheets to your pupils.
Note: These resources work with the official Adobe Acrobat Reader on Windows or Mac computers
