Double-Digit Multiplication
12 X 12
144
144 ÷ 12
12
10/8
5/4
5:a :: 30:42
a=7
Sammy uses 3 ounces of carrots for every 4 ounces of potatoes to make soup. If she uses 16 ounces of potatoes, how many ounces of carrots should she use?
12 ounces of carrots
14 X 18
252
300 ÷ 15
20
27/18
3/2
12:16 :: 3:a
Ms. S and Mrs. Krohn each save money at their own constant rate. Ms. S saved $15 while Mrs. Krohn saved $20. When Ms. S has saved $24, how much will Mrs. Krohn have saved?
Mrs. Krohn saved $32.00
20 X 20
400
400 ÷ 25
16
84/35
12/5
2:9 = 8:a
a=36
Emily's photograph is 8 inches wide and 12 inches long. She wants to enlarge the photograph so it is 30 inches long. How wide should the photograph be if she wants the same ratio of length to width.
20 inches long
25 X 12
300
525 ÷ 7
48/72
2/3
24:28 = a:35
a=30
In the zoo, there are 6 flamingos for every 8 ducks. If there are 20 ducks, how many flamingos are there?
15 Flamingos
30 X 25
750
600 ÷ 8
75
40/60
2/3
16:a :: 10:35
a=56
Breanna uses 12 cups of chocolate for 15 cups of pretzels to make chocolate covered pretzels. If she uses 8 cups of chocolate, how many cups of pretzels should she use?
10 cups of pretzels