Grade 5
Math Unit 2 Review - “Numbers to 1 000 000”
October 2015
1. Be able to write a number in standard form (84 372), expanded form
(80 000 + 4000 + 300 + 70 + 2) and written form (eighty-four thousand three
hundred seventy-two).
2. Be able to fit a number in a place value chart. For example: 572 045
Hundred
Thousands
5
Ten
Thousands
7
Thousands
Hundreds
2
Tens
0
Ones
4
5
3. Explain the value of each digit in a number. For example: 20 957
2 means 20 000
9 means
900
5 means
50
7 means
7
4. Compare numbers using greater than ( > ), less than ( < ), and equal to (=)
For example: 4097 > 4090
16 433 < 100 867
79 399 = 79 399
5. Be able to order numbers from least to greatest and greatest to least.
6. Be able to use front-end estimation (keep the digit in the highest place value the
same and change the digits that follow to zeros).
Example: 562 + 732
would be front-end estimated as 500 + 700 = 1 200
7. Be able to use adjusted front-end estimation (adjusting the
largest place value based on the rest of the number).
Example: 1856 + 2778 would be estimated as 2000 + 3000
8. Be able to use rounding to make an estimate.
Looking at the digit to the right of the highest place value
If it is less than 5, round down.
If it is greater than 5, round up.
If it is exactly 5, round up or down depending on the overall effect it would have
Example: 6004 + 355
think 6000 + 400 = 6400
9. Be able to estimate using compatible numbers. Compatible numbers are pairs of
numbers that are easy to work with. We worked with compatible numbers that have
a sum of 10, 100, 100, 10 000 and 100 000.
10. Be able to explain a situation where you need to overestimate.
11. Review your multiplication and division facts for 10, 5, and 2.
These are the multiplication and division facts we have worked on during daily
mental math for the past three weeks.
10x1
10÷10
5x1
5÷5
2x1
2÷2
10x2
20÷10
5x2
10÷5
2x2
4÷2
10x3
30÷10
5x3
15÷5
2x3
6÷2
10x4
40÷10
5x4
20÷5
2x4
8÷2
10x5
50÷10
5x5
25÷5
2x5
10÷2
10x6
60÷10
5x6
30÷5
2x6
12÷2
10x7
70÷10
5x7
35÷5
2x7
14÷2
10x8
80÷10
5x8
40÷5
2x8
16÷2
10x9
90÷10
5x9
45÷5
2x9
18÷2
12. Number Patterns: remember that every number pattern has a rule.
Be able to explain what the rule is for a given pattern of numbers.
For example: 68 000, 68 100, 68 200, 68 300
Pattern Rule: Add 100
Be able to fill in the missing number in a number pattern.
For example: 7211, _______, 9211, 10 211
(missing number is 8211)
---------------------------------------------------------------------------------------*You may find it helpful to look through your scribbler work and your textbook
(page 36 – 63).
* We will write this unit test on Friday, October 2, 2015