← Use
ForOurSchool.org
to host your school's Math-A-Thon
← Use
ForOurSchool.org
to host your school's Math-A-Thon
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Addition
Addition
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Addition with 3 numbers within 100
All Addition math games
Addition within 100
Addition with 3 numbers within 100
Addition within 200
Addition word problem within 100
Addition within 1,000
77
+
10
+
11
=
?
101
98
103
96
Skip
Hint
Can you answer 10 correctly?
The sum of 77, 10, and 11 is
?
+20
+1
77
97
?
When adding numbers, it can be helpful to decompose the second number using the place value method and then use the arrow method to grow the first number by each place value
For example, if we have 225 + 653
Decompose 653 into 6 hundreds, 5 tens, and 3 ones
Grow 225 by +600 (=825)
Grow 825 by +50 (=875)
Grow 875 by +3 (=878)
Strategies:
Arrow Method
,
Break Apart
,
Compensation
,
Place-Value Chart