Standard Algorithm
Define standard algorithm in your own words.
Lined up like cars in their lane.
Define area model in your own words.
When the numbers are decomposed and we multiply across. Add the values from the boxes together.
Define estimate...
to find the approximate answer.
Define partial products in your own words.
To decompose the numbers according to place value. Example: 23 x 4
20 x 4 + 3 x 4
The rock museum has 324 display drawers. Each drawer holds 23 rock samples. About how many rock samples does the museum have?
7,452
1,357 x 7
9,499
32 x 86
2,752
Which equation represents the best estimate for
367 x 29:
A. 300 x 20= 6,000
B. 300 x 30= 9,000
C. 400 x 20= 8,000
D. 400 x 30= 12,000
D
68 x 45
60 x 40 + 60 x 5 + 40 x 8 + 8 x 5
= 3,060
Blaire reads 242 pages each week for 3 weeks and 125 pages each week for 4 weeks. How many pages does she read in all?
1,226
583 x 5
2,915
53 x 27
1,431
The track team runs a combined average of 126 miles per day. How many miles might the team run in 5 days? Estimate the solution then solve.
Estimate 126 to 100
100 x 5 = About 500
Answer=630 (exact)
13 x 97
10 x 90 + 3 x 90 + 10 x 7 + 3 x 7
= 1,261
What is the area of the rectangle? The width is 17 meters and length 32 meters.
544
541 x 62
33,542
478 x 12
5,736
What is the most reasonable estimate for 58 x 372?
60 x 400= 24,000
Exact= 21,576
49 x 32
40 x 30 + 40 x 2 + 9 x 30 + 9 x 2
= 1,568
A movie ticket costs $12. During one day a theater sold 478 tickets. About how much money did the theater receive that day?
5,000
837 x 4
3,348
340 x 32
10,880
Estimate 142 x 17
100 x 20 = 2,000
Ultimately, you choose the strategy that you want to use to solve multi digit multiplication. Which do you like best and why:
A) Area Model
B) Standard Algorithm
C) Estimation
D) Partial Products
A, B, C, or D with explanation.
A rectangular screen measures 245 inches long and 84 inches tall. Use partial products to find the area of the screen.
20,580