Vocabulary
The number of objects in rows and columns
What is array
8 x 1=
8 x 10=
8 x 100=
What is 8, 80, and 800
10 x 24=
What is 240
Round 24 x 18=
What is 400
Find the product.
24 x 16=
What is 200 + 120 + 40 + 24= 384
You multiply numbers to find a
What is product
3 x 4=
3 x 40=
3 x 400=
What is 12, 120, 1,200
20 x 42=
What is 840
Round 64 x 13=
What is 600
Find the product.
13 x 14=
What is 100 + 40 + 30 + 12= 182
Opposite equations are called
What is inverse operations
9 x 2=
9 x 20=
9 x 200=
What is 18, 180, and 1,800
32 x 30=
What is 960
Round 55 x 76
What is 4,800
Find the product.
15 x 32=
What is 300 + 20 + 150 + 10= 480
Products found by breaking one factor in a multiplication problem into ones, tens, hundreds, and so on and then multiplying each of these by the other factor.
What is partial products
6 x 5=
6 x 50=
6 x 500=
What is 30, 300, 3,000
33 x 60=
What is 1,980
Round 66 x 31=
What is 2,100
Find the product.
15 x 18=
What is 100 + 80 + 50 +40= 270
Numbers that are easy to compute mentally
What is compatible numbers
8 x 70=
8 x 700=
8 x 7,000=
What is 560, 5,600, 56,000
50 x 94=
What is 4,700
Round 51 x 44
What is 2,000
17 x 14=
What is 180 + 40 + 70 + 28= 318