0Cross Multiplying Two Digit Numbers
Cross Multiplying Two Digit Numbers
Problem : 16 x 28
Step 1: First, write your problem down, sitting on top of each other, like you would do when multiplying normally.
1 6
x 2 8
______
Step 2: Multiply the numbers in the ones place and put the product underneath the problem as shown. In this case, 8*6 is greater than 10 (48).
1 6
x 2 8
________
48
Step 3: Cross-multiply the ones with the opposing tens and add them together. In this case, (2*6) + (1*8) = 20. Write 20 underneath 48 one space to the left (ending on the tens column)
1 6
x 2 8
_________
48
20
Step 4: Multiply the tens. 1*2 = 2. Place this product another space to the left, in the hundreds column as shown.
1 6
x 2 8
_______
48
20
2
Step 5 : Now, add the products. Add the three rows as you do in normal multiplication method. The sum of the three rows you created equal 448, our answer.
1 6
x 2 8
______
48
20
2
_____
448
