Enter numbers below:
Using grouping if applicable:
Evaluate 12 + 15
Grouping by 10, for 12, we have:
(10) + 2
Grouping by 10, for 15, we have:
(10) + 5
We have 2 groups of 10
(10 + 10) + 2 + 5
20 + 7
12 + 15 = 27
12 + 15 = 27
What is the Answer?
27
How does the Number Bonds Calculator work?
Free Number Bonds Calculator - Adds or subtracts 2 numbers and using grouping by 10 or 100. Also called number bonds or addition facts. Multiplies two numbers using tape diagrams.
This calculator has 1 input.
This calculator has 1 input.
What 6 concepts are covered in the Number Bonds Calculator?
- addition
- math operation involving the sum of elements
- diagrams
- grouping
- number
- an arithmetical value, expressed by a word, symbol, or figure, representing a particular quantity and used in counting and making calculations and for showing order in a series or for identification. A quantity or amount.
- number bonds
- subtraction
- math operation involving the difference of elements
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