Show:
Multiplying 2 by 2-Array
Expanded Algorithm
Multiply 2 digit by 10's
Multiply 2 digit by 2 digit-Standard
Story Problems
100
19 X 23 =
437
100
41 X 25 =
1,025
100
12 X 20 =
240
100
78 X 35 =
2730
100

Problem 1: dd

300 pages in a month 900 pages over the summer

200
34 X 27 =
918
200
34 X 51 =
1,734
200
24 X 50 =
1200
200
37 X 21 =
777
200
Problem 1: Mr. Dunn drives a 12 mile round trip 3 times a week to the dog park. How many miles does he drive? Problem 2: Mr. Dunn estimates he uses 4 gallons of gas over the course of the week to and from the dog park. How many miles per gallon does his car get?
36 miles to the dog park 9 miles per gallon
300
53 X 69 =
3,657
300
64 X 32 =
What is 2,048
300
33 X 20 =
660
300
81 X 17 =
1,377
300
Problem 1: April made 16 baskets and glued 5 flowers on each one. How many flowers did she use in all? Problem 2: Each flower April used had 8 petals. How many petals were there on all the flowers she used?
80 flowers 640 petals
400
24 X 16 = What are the partial products?
384 200, 120, 40, 24
400
26 X 53 = What are the partial products?
18, 60, 300, 1000 1,378
400
60 X 23 =
1380
400
67 X 57 =
3,819
400
Problem 1: Jorge washed cars for 4 hours on Saturday. In the first hour he washed 4 cars. In the second hour, he washed 7 cars. In the third hour, he washed 9 cars. How many cars did he wash in the first 3 hours? Problem 2: Jorge washed the same number of cars in the fourth hour as he did in the first 3 hours combined. How many cars did he wash in all four hours?
20 cars 40 cars
500
37 X 26 = What are the partial products?
962 42, 140, 180, 600
500
29 X 47 = What are the partial products?
1,363 63, 140, 360, 800
500
52 X 50 =
2600
500
35 X 29 =
1,015
500
Problem 1: The longest book Toshi had read was 304 pages. She just finished Kira-Kira by Cynthis Kadohata, which is 256 pages. How much longer was the longest book Toshi read than Kira-Kira? Problem 2: Toshi estimates that she needs 2 minutes to read one page. How many minutes longer did she spend reading the 304 page book than Kira-Kira? Explain how you found your answer.
48 pages longer 96 minutes