Grouping
The following addition problem can be written as what multiplication problem?
4+4+4
3 x 4
The expression 5 x 2 is equal to what?
2 x 5
2 x 10 = ?
20
Jim teaches classes at the local gym. He can only train 5 people ever hour. How many people can Jim train after 7 hours?
35
4 x 5 =
20
The following addition problem can be written as what multiplication problem?
2+2+2+2+2+2
6 x 2
The expression 9 x 4 is equal to what?
4 x 9
What is the rule for multiplying by tens?
The number with a 0 on the end
Seven people went to dinner together. Their bill was $42. The bill was shared equally. How much did each person pay?
6 dollars
6 x 8 =
48
How can I break down 3 x 9 into smaller pieces to make it easier to multiply?
9 broken into 4 and 5
The expression 3 x 10 x 7 is equal to what?
3 x 7 x 10
Break this problem into smaller pieces
4 x 40
4 x 4 x 10
Tonya manages a restaurant. She uses 12 sticks of butter each month. She bought enough butter for 4 weeks to use 4 sticks of butter each. Did she buy enough butter?
Yes, she bought 16 sticks.
7 x 9 =
63
Are the following two problems the same? Why?
3+3+3+3+3+3+3+3
3 x 9
No, the addition has only 8 3's.
The expression 6 x 10 x 4 is equal to what?
6 x 4 x 10
120 is _____ tens
12
Mike drew 8 comic strips. Each one had 5 pictures. How many pictures did Mike draw?
40
11 x 11 =
121
What expression does the following group give you?
5 x 8
The expression 5 x 10 x 7 x 10 is equal to what?
5 x 7 x 10 x 10
Break this into smaller pieces
30 x 90
3 x 10 x 9 x 10
Lena and Oscar buy ads in the newspaper. Lena buys 7 ads. Oscar buys 4 times as many ads. How many more ads did Oscar buy?
21 more ads
12 x 7 =
84