3-digit number plus multiple of 100
for 2nd grade
Use mental calculations to add the given multiple of 100 to a three-digit number
Mental calculations: 3 digit numbers plus hundreds
Learn how to add multiples of one hundred to 3 digit numbers
When we want to add a smaller number to a bigger number, there are sometimes shortcuts that make it easier. If one of the numbers is 100 or a multiple of 100, adding that number to another number just means increasing the hundreds column of the other number by the number of hundreds you are adding.
So, for instance, if you want to add:
657 + 200
all you need to do is add 2 to the hundreds column value which is 6, so you get 8 for the hundreds column. The rest of the other number stays the same, so the total addition looks like this:
657 + 200 = 857
In the same way, adding 419 and 400 gives:
419 + 400 = 819
It is the same idea if you want to add units to 3 digit numbers but this time you would add to the units column value by the number of units you want to add, so, for instance, 271 + 5 = 276 because all we had to do was add 5 to the units column value to get an answer.
Below is a table showing the first 6 question answer pairs for the topic "3-digit number plus multiple of 100" as used in the lessons for this topic. Our games and tests for the topic use these 6 items plus 10 additional question answer pairs.
The topic "3-digit number plus multiple of 100" is in the category Addition for 2nd grade (ages 7 to 8).
Revise '3-digit number plus multiple of 100' with one of our games for 2nd grade
Each of our math topics for elementary are made up of between 6 and 20 question and answer pairs (both the written form and a robot voice speaking those questions and answers). Each topic can be used with all the activities on the site.
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