Upload
christina-strickland
View
221
Download
0
Embed Size (px)
Citation preview
IntegersStudents will be able to add and subtract using integers.
What are the rules for adding and subtracting integers?
Daily Math Review
This is your warm up. Come in and get started right away Organization of warm up.
Binder Set Up
Daily Math Review (DMR)/Warm Ups Homework Notes/Vocab Class Work Tests/Quizzes
Heaps and Holes
Have you ever been to the beach? Have you ever played with the sand? Have you ever dug a hole in the
sand? The sand you dig out = positive The hole = negative
Using Number Lines
Draw 5 number lines in your notes. Number them from -10 to +10. What IS an integer on a number line? What IS addition on a number line? What IS subtraction on a number line?
Using Number Lines: Let’s try a few…
Solve using a number line. Include a verbal explanation with each.
1. -5 + 2 3. 7 - ( -1) 5. -8 - (-2)
2. 6 + (-7) 4. -3 - 2
Integers as Counters
Using counters, draw and label the number 3, -4, and zero in your notes.
What IS an integer as a charge? What IS addition with counters? What IS subtraction with counters?
Solve and Explain
Solve using counters. Include a verbal explanation with each.
1. -5 + 2 3. 7 - ( -1) 5. -8 - (-2)
2. 6 + (-7) 4. -3 - 2
Using Counters
We can also use and to represent positive and negative numbers.
For each of our positive numbers, we will use a + sign and for all of our negative numbers, we will use a – sign.
Let’s try a few…
+ -
Integer RULES
List the integer addition and subtraction rules you have been taught in years prior to 8th grade.
What IS a rule? Why do you use them? What are the relationships between
the rule and the number line or counters?
Solve and Explain
Solve using the rules. Include a verbal explanation with each.
1. -5 + 2 3. 7 - ( -1) 5. -8 - (-2)
2. 6 + (-7) 4. -3 - 2
Integer War
Split a deck of cards between you and your partner(s) evenly.
Round 1: Flip two cards over. Black cards are positive and Red cards are negative. Find their sum. The largest sum wins the cards. Go through the entire stack.
Round 2: Do the same, but subtract the first card and second card. You must keep the order flipped.
Homework
Complete the addition and subtraction worksheet, multiples of 3.
Record any problems you could not solve or with which you had difficulty.
Prepare a question to ask in class about these problems.
Challenge: Complete problems #21 - 30