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Adding Using Partial Sums. Steps: Partial Sums. Add the value of the digits in the hundreds Add the value of the digits in the tens Add the value of the digits in the ones Add the partial sums together. 189 + 233. 100 + 200 300. 80 + 30 110. 9 + 3 12. 422.
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Steps: Partial Sums • Add the value of the digits in the hundreds • Add the value of the digits in the tens • Add the value of the digits in the ones • Add the partial sums together 189 + 233 100 + 200 300 80 + 30 110 9 + 3 12 422 Click on the video camera to watch a video