Hi Avaneesh,

1) 1215 × 43

Step 1: 5 × 3 = 15 → write 5, carry 1

Step 2: (1×3 + 5×4) = 3 + 20 = 23 + 1 = 24 → write 4, carry 2

Step 3: (2×3 + 1×4) = 6 + 4 = 10 + 2 = 12 → write 2, carry 1

Step 4: (1×3 + 2×4) = 3 + 8 = 11 + 1 = 12 → write 2, carry 1

Step 5: (1×4) = 4 + 1 = 5

Answer = 52,245

2) 1326 × 42

Step 1: 6×2 = 12 → write 2, carry 1

Step 2: (2×2 + 6×4) = 4 + 24 = 28 + 1 = 29 → write 9, carry 2

Step 3: (3×2 + 2×4) = 6 + 8 = 14 + 2 = 16 → write 6, carry 1

Step 4: (1×2 + 3×4) = 2 + 12 = 14 + 1 = 15 → write 5, carry 1

Step 5: (1×4) = 4 + 1 = 5

Answer = 55,692

3) 1527 × 65

Step 1: 7×5 = 35 → write 5, carry 3

Step 2: (2×5 + 7×6) = 10 + 42 = 52 + 3 = 55 → write 5, carry 5

Step 3: (5×5 + 2×6) = 25 + 12 = 37 + 5 = 42 → write 2, carry 4

Step 4: (1×5 + 5×6) = 5 + 30 = 35 + 4 = 39 → write 9, carry 3

Step 5: (1×6) = 6 + 3 = 9

Answer = 99,255

4) 1625 × 36

Step 1: 5×6 = 30 → write 0, carry 3

Step 2: (2×6 + 5×3) = 12 + 15 = 27 + 3 = 30 → write 0, carry 3

Step 3: (6×6 + 2×3) = 36 + 6 = 42 + 3 = 45 → write 5, carry 4

Step 4: (1×6 + 6×3) = 6 + 18 = 24 + 4 = 28 → write 8, carry 2

Step 5: (1×3) = 3 + 2 = 5

Answer = 58,500

5) 1726 × 16

Step 1: 6×6 = 36 → write 6, carry 3

Step 2: (2×6 + 6×1) = 12 + 6 = 18 + 3 = 21 → write 1, carry 2

Step 3: (7×6 + 2×1) = 42 + 2 = 44 + 2 = 46 → write 6, carry 4

Step 4: (1×6 + 7×1) = 6 + 7 = 13 + 4 = 17 → write 7, carry 1

Step 5: (1×1) = 1 + 1 = 2

Answer = 27,616