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If you have 305 and add 205 using the abacus, what is the sum?
  • a)
    510
  • b)
    500
  • c)
    515
  • d)
    505
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
If you have 305 and add 205 using the abacus, what is the sum?a)510b)5...
  • Set 305 on the abacus: 3 beads in the hundreds column, 0 beads in the tens column, 5 beads in the ones column.
  • Add 205: Add 2 beads to the hundreds column (total 5 beads), and 5 beads to the ones column (total 10 beads, carry over 1 to the tens column).
  • The total is 510.
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Community Answer
If you have 305 and add 205 using the abacus, what is the sum?a)510b)5...
Abacus Addition: 305 + 205

Step 1: Representing 305 on the abacus
- Start by representing 300 on the abacus using three beads in the hundreds place.
- Then, represent 5 in the ones place using five beads.

Step 2: Adding 205 to 305
- To add 205, represent 200 on the abacus using two beads in the hundreds place.
- Then, represent 5 in the ones place using five beads.

Step 3: Calculating the Sum
- Count all the beads in the hundreds place, which gives you 500.
- Count all the beads in the ones place, which gives you 10.
- Therefore, the sum of 305 and 205 using the abacus is 510.
Therefore, the correct answer is option A) 510.
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