1. HARD

99 \(+\) 22 \(=\)
 
2. HARD

14 \(+\) 87 \(=\)
 
3. HARD

47 \(+\) 39 \(=\)


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More questions:
Compose and Decompose 2D and 3D Shapes and Figures  |   Rounding to the Nearest 10  |   Representing Multiplication as Combining of Equal Groups  |   Comparing Numbers  |   Problem Solving