Multi-Digit Multiplication
Evaluate the following multiplication problem:
25 x 4 =
100
Evaluate the following multiplication problem:
12 x 70 =
840
4 x 6 = 24, so
40 x 6 =?
240
The answer to a multiplication problem is called a.
Product
Subtract:
3021 - 2132 =
889
Evaluate the following multiplication problem:
158 x 2 =
316
Evaluate the following multiplication problem:
70 x 14 =
980
7 x 9 = 63, so
700 x 9 = ?
6,300
The word that describes the answer to a subtraction problem.
Difference.
ADD
123 + 456 + 789 =
1,368
Evaluate the following multiplication problem:
351 x 5 =
1755
Evaluate the following multiplication problem:
45 x 76 =
3,420
4 x 5 = 20, so
4 x 500 = ?
2,000
(NOT 200!)
The word that describes the answer to an addition problem.
SUM
What comes next in this pattern?
1,5,9,13....
17
(Add four)
Evaluate the following multiplication problem:
708 x 8 =
5,664
Evaluate the following multiplication problem
92 x 20
1840
6 x 8 = 48, so
60 x 80 = ?
4,800
Numbers being multiplied together are called
FACTORS
Name TWO of the properties of MULTIPLICATION
-Commutative, Distributive, Associative, Identity, etc.
Evaluate the following multiplication problem:
476 x 9 =
4,284
Evaluate the following multiplication problem:
56 x 52
2,912
1 x 1 = 1, so
1000 x 1000 = ?
1,000,000
aka 1 million
Name 3 different methods we have used for multiplication
1. Area model/box method,
2. Standard algorithm multiplication,
3. partial products.
MENTAL MATH! (Must do it in your head, no writing!)
223 x 4 =
200 x 4 = 800
20 x 4 = 80
3 x 4 = 12
Answer: 892