This week
Lessons 6, 7, 8, 9 & 10
STILLWATER CROSSING · THE COURSE NOTES · BRIDGE MATH 5/6
Week 2 · Averages and Checking Division
Papers
Test 1 to do at home
Method
No calculators, ever · show every step
Note-Taking Tip: This week, notice how the examples follow the notes. Good note-takers write down both the rules and the examples.
Instructional notes
Averages To find the average of a group of numbers: • Add to find the sum of all the numbers • Count the number of _numbers __ • Divide the sum by the number of addends
Example
Find the average of the numbers 512, 718, and 1,026.
Practice
Find the average of each set of numbers.
Instructional notes
Rounding and Estimation To round a number: • Underline the digit in the place you want to round to • Circle the digit to the immediate _right___ If the digit is 5 or more, you will round the underlined digit up If the digit is less than 5, the underlined digit stays the _same_ • Replace every digit to the right of the underlined digit with a 0
Example
Estimate by rounding.
Practice
Estimate by rounding each number before performing the operation.
Instructional notes
Division with Two-Digit Divisors To divide with a two-digit divisor: • Determine where the first digit in the quotient will be placed • Estimate the divisor and write the tens place digit near the divisor • Use the estimate to help determine the first digit in quotient • Use division steps (divide, multiply, subtract, compare, bring down and repeat)
Example
Divide.
8
Practice
Divide.
Quick Review
Write in standard form: 15 billion, 49 thousand, 5 15,000,049, 005
Place commas correctly and circle the digit in the ten millions place. 889,36 6,534,906,382
Use subtraction to find the unknown addend. k + 25 = 87 k=62
Cali Jo sold pizzas at the county fair. She sold 154 pepperoni, 213 cheese, 58 veggie, and 35 sausage pizzas. What was the total number of pizzas she sold? How many more cheese pizzas than pepperoni pizzas did she sell?
460 pizzas sold 59 more cheese than pepperoni
Homework this week
| Work-text | Lesson 6 | Lesson 7 | Lesson 8 | Lesson 9 | Lesson 10 |
|---|---|---|---|---|---|
| Speed drill | 6 | 7 | 8 | 10 |
Terms on the record
| Term | Meaning |
|---|---|
| averages | To find the average of a group of numbers: |
| more | If the digit is 5 or more, you will round the underlined digit up |
| less | If the digit is less than 5, the underlined digit stays the _same_ |
| same | If the digit is less than 5, the underlined digit stays the _same_ |
STILLWATER CROSSING // BRIDGE MATH // PENUMBRA · steady on