Adding and Subtracting Integers Unit Grade 7 Math 5 Days Tools ...

Lesson: Day One-Comparing integersTime: 45 minutesObjectives:• The students will be able to compare integers.Materials:• Four-Pan Algebra Balance• Index cards with , and = written on them• Chips for the Four-Pan Algebra BalanceActivities:1. On the board will be the following problem of the Day, for the students tocomplete as they sit down.• Using < , > , or = to compare the following numbers• 10 2• 3 6• 0 4• 5 4• 6 9• We will then go over the problems reviewing < , > , and =.2. I will model to the class how to use the Four-Pan Algebra Balance tocompare integers.• I will write 3 = 3 on the chalkboard. Then I will place 3 chips inthe yellow pan the left side then 3 chips in the yellow pan the rightside. I will ask the class how the balance shows us that 3 reallyequals 3. Then I will hold up the equal index card.• Next I will write -4 = -4 on the chalkboard. I will place 4 chips ineach red pan the balance and I will hold up the equal card again. Iwill ask the class what the different colored cups represent.• Then I will write 2 < 4 on the chalkboard and place thecorresponding chips in the pans. We will note that the balance ispointing towards the smaller number.• Have each group of students use the Four-Pan Algebra Balance tomake a model of the following equations, while noticing whichway the pointer is pointing:• 7 > 3• 4 < 8• 1 < 7• Write -3 < 4 on the board, have the students guess which way thepointer is pointing. Then have them try it, in their groups, to see ifthey were correct.7