Mult. & Div 6 & 7
Write the two division problems in this fact family.
6 x 7 = 42
42/ 7 = 6
42/6 = 7
Place the parentheses to make this equation true.
16 − 4 + 7 = 19
(16-4) + 7= 19
Skip count by 9 to 90.
9, 18, 27, 36, 45, 54, 63, 72, 81, 90
0 x 5 =
2 x 4 = 8
20 x 4= m
What does m equal?
m = 80
Skip count by 6s to 60.
6, 12, 18, 24, 30, 36, 42, 48, 54, 60
Solve both equations.
60 + (10 − 4) =
(60 ÷ 10) − 4 =
60 + (10 − 4) = 66
(60 ÷ 10) − 4 = 2
Use a tens fact to solve 9 x 6.
10 x 6 = 60
60- 6= 54
9 x 6 = 54
1 x 12=
12
60 x 6 =
360
Skip count by 7s to 70.
7, 14, 21, 28, 35, 42, 49, 56, 63, 70
(6 x 10) X 2 = 6 X (10 X 2)
True or false?
True! Both equations equal 120. The Associative Property says you can move the parentheses in a multiplication problem and still get the same product.
Dennis calculates 9 × 8 by thinking about it as 80 − 8 = 72. Explain Dennis’ strategy.
Dennis used a tens fact! 10 x 8= 80. He then took away one 8 to get 9 x 8 = 72.
n x 1 = 9
What does n equal?
9
3 x 3 x 10
90
Molly says she can count by seven 6 times to solve 7 × 6. James says he can count by six 7 times to solve this problem. Who is right? Explain your answer.
They are both right because if you skip count by seven 6 times that will = 42. If you skip count by six 7 times you will also get 42. It's the commutative property!
Solve (3 x 3) x 4
36
Mrs. Parson gave each of her grandchildren $9. She gave a total of $36. How many grandchildren does Mrs. Parson have?
4 grandchildren
8/ 0 =
You can not divide a number by zero groups! If I flipped the equation to multiplication, that would say 0 x 0= 8 and that's not true!
Mr. Perez buys 3 sets of cards. Each set comes with 18 striped cards and 12 polka dot cards. He uses 32 cards. How many cards does he have left?
He has 58 cards left.