Area Model
530 x 2,075
One of these partial products is incorrect:
500 x 2000
7 x 5
30 x 70
2000 x 30
What is 7 x 5?
14.3 x 298 = 42614
The decimal point is correct in:
4261.4
426.14
42.614
What is 4261.4?
50 times the sum of 64 and 36
What is 50 x (64 + 36)?
or
What is (64 + 36) x 50
67 - 18 divided by 6 x 3
This part of the expression is done first.
What is 18 divided by 3
This should be identified after the second read in the three-read protocol.
What are the quantities?
One of these partial product does not belong to
0.45 x 26...the correct answer is:
0.05 x 20
0.40 x 6
0.5 x 6
0.4 x 6
What is 0.5 x 6? because the value of the 5 in 0.45 is 0.05
25.14 x 40 = 100560
The decimal point goes
100.560
1005.60
10056.0
What is 1005.60?
Divide the difference between 300 and 200 by 5.
What is (300 - 200) divided by 5?
14 + 12 x (6 x 5) x 7
This part of the expression is done second.
What is 12 x 30?
This should be identified after the first read of the three-read protocol.
What is the situation?
Explain why multiplication that includes a three-digit multiplier, will not always have three partial products.
Because the three-digit multiplier may contain a zero (0).
When multiplying
763
x 21
We include a zero (0) at the beginning of the second partial product because...
What is we are now multiplying from the tens place.
One of these expressions is NOT equivalent to 16 x 29
29 sixteens
16 x (30 - 1)
(14 + 2) x 29
(10 x 29) - (6 x 29)
What is (10 x 29) - (6 x 29)?
40 x [(9 + 21) - 5]
This part of the expression is done first.
What is (9 + 21)?
When multiplying 1,729 times 308, John got a product of 53,253. Does this product seem reasonable? Explain
What is no, this product does not seem reasonable?
Think 1,729 ≈ 2,000
Think 308 ≈ 300
2000 x 300 = 600,000
3.1 x 33
This shows one of the partial products of this expression
30 x 1 = 30
3 x 1 = 3
30 x 30 = 900
30 x 3 = 33
What is 30 x 3?
When multiplying using standard
453
x 72
Which numbers when multiplied will have the first regrouping.
What is 5 x 2 because from the 10, the 1 would be placed over the 5.
Eve says 45 x 302 is the same as (45 x 3) + (45 x 2) because the 0 is not included.
Is Eve correct? Explain
What is Eve is incorrect because although the 0 times any number is 0, the 3 in 302 is 300 not 3 ones?
84 divided by 4 x 6 - 102
This part of the expression is done first?
What is 84 divided by 4?
Each of the 25 students in Mr. McDonald's class sold 16 raffle tickets. If each ticket costs $15, how much money did Mr. McDonald's students raise?
The last step in the solution would be...
What is the total number of tickets times $15?
When multiplying 224.24 x 24 using an area model. How many partial products will there be?
What is 10?
When multiplying using the standard method
6,789
x 401
How many partial products will there be?
What is 3 partial products?
Juan delivers 174 newspapers every day. Edward delivers 126 more newspapers each day than Juan. One of these expressions show how many newspapers Edward will deliver in 29 days.
174 x 126
126 x 29
174 x 29 + 126
126 x 29 + 174
None of the above
What is 174 x 29 + 126?
Solve
(25 + 5) x 2 - 30 + 103
What is 1,030?
Peng bought 26 treadmills for her new fitness center at $1,334 each. Then, she bought 19 stationary bikes for $749 each. How much did she spend on her new equipment?
How many steps does this problem require? What are they?
What are 3 steps?
($1334 x 26) + ($749 x 19)