3.1: what’s my rule?. mental math solve the fact problems. write your answer on your slate. 30 +...
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3.1: What’s My Rule?
Mental Math Solve the fact problems.
Write your answer on your slate.
30 + 50 =
80 - 40 =
42 + 20 =
75 - 20 =
98 + 22 =
66 – 41 =
Math MessageEach person in the United States uses about 50 gallons of water per day. Use this information to complete the “What’s My Rule?” table in your notebook. In
(days)
Out
(gallons)
1 50
6
10
30
365
300
5001,500
18,250
What is the rule? X 50
In
(days)
Out
(gallons)
1 50
6
10
30
365
300
5001,500
18,250
What do the numbers in the in (input) column represent?What do the numbers in the out (output) column represent?
How are the input and output columns related?
In Out
30
90
65
110
Rule
Subtract 15
In Out
350
120
665
421
Rule
Add 100
Variations of the “What’s My Rule” Routine
15
75
15
95
250
20
565
321
In Out
7 49
2 14
9 63
600 4,200
Rule
_________Multiply by 7
Other variations of “What’s My Rule?”
In Out
54 9
42
24 4
100
Rule
Pounds Cost
1 $3.75
2
$18.75
11
Rule
A pound of nuts cost $3.75
7
600
Divide by 6
$7.50
$41.25
5
Math Journal page 53
Do #1-2 on your own.
Do #3-6 with your math partner.
Wrap it UP!
• Fill in this “What’s My Rule” table
In Out
100 25
16 4
24
3
4
Rule
Divide by 4
6
12
1
Tonight’s Homework
ALSO:
Put initials on and cut out your x, / triangles (activity sheets 1-4 in math journal). Bring back to school tomorrow.
Math Boxes