A new mental math trick and reconciling bank statements.

2. Multiplying Two-Digit Numbers
Same First Digit, Second Digits Sum to 10
We’ll use 47 x 43 = 2021 as an example.
Procedure Example
Step 1: Multiply first digit by one number greater
than itself; this is the first part of the answer. 4 x 5 = 20
Step 2: Multiply the two second digits; the product 7 x 3 = 21
is the last part of the answer.
Step 3: Put the pieces together: 47 x 43 = 2021

3. Let's practice ...
Find:
34 x 36 =
51 x 59 =
24 x 26 =
83 x 87 =
62 x 68 =

4. The Bank Statement is
correct. Identify the
errors in the transaction
record.