6. Draw the given grid
● Randomly write
● 40, 54, 3, 64, 42, 24, 15, 27, 1,
20, 12, 6, 49, 14, 4, 35, 25, 30,
21, 72, 18, 16, 10, 28.
● Instructions •
● Your teacher will call out multiplication
questions. • You must quickly calculate the
answers to the questions. • If an answer
matches any of the numbers on your bingo
card, you may cross that number with a cross.
• The middle space may be covered with a
cross without answering a question. • To win,
your crosses must be in a pattern that is
specified at the beginning by your teacher
(e.g. line, x, full card
15. Sample Problem: 36 x 42
Step 1: Write both numbers in expanded form, one
set across the top, the other down one side.
30 6
40
2
16. Sample Problem: 36 x 42
Step 2: Locate where each number meets inside
box #1. Multiply the two numbers.
30 6
40
2
1,200
Strategy: Multiply the basic fact, then add the zeroes. 40 x 30 -> 4x3=12 plus 2 zeroes = 1,200
17. Sample Problem: 36 x 42
Step 3: Locate where each number meets inside
box #2. Multiply the two numbers.
30 6
40
2
240
Strategy: Multiply the basic fact, then add the zeroes. 40 x 6 -> 4x6=24 plus 1 zero = 240
18. Sample Problem: 36 x 42
Step 4: Locate where each number meets inside
box #3. Multiply the two numbers.
30 6
40
2 60
Strategy: Multiply the basic fact, then add the zeroes. 30 x 2 -> 3x2=6 plus 1 zero = 60
19. Sample Problem: 36 x 42
Step 5: Locate where each number meets inside
box #4. Multiply the two numbers.
30 6
40
2 12
Strategy: Multiply the basic fact, then add the zeroes. 2 x 6 -> 2x6=12 plus no zeroes = 12
20. Sample Problem: 36 x 42
Step 6: Add the 4 numbers from each box together.
30 6
40
2 12
1,200 240
60
1,200
240
60
12
1,512
1
21. 36 x 42 = 1,512
Step 7: Bask in your awesomeness.
32. First… you want to pretend that you are doing two digit by one
digit multiplication. I like to cover the digit.
45
X32
33. Second… Follow the steps when multiplying. Two X Five is Ten,
so you would write the zero and carry your one.
45
X32
0
1
9
0
5
1
13
+
144 0
Now we clean house!
You will ALWAYS place a zero in the
ones place when moving on to the
tens place. But first, you want to erase
the numbers you carried.
We can now move on to the tens place.
Now place a zero in the units place as we
are multiplying a number in the tens place.
So any !
Now add your two sums to get the product!
