RED
_____ is the value given to the place a digit has in a number.
Place value
You ______ when you do not need an exact answer.
ESTIMATE
Numbers that are easy to compute mentally are __________.
cool numbers, just kidding..... compatible numbers
A _______ is a symbol that represents an unknown number.
variable
You do not need pencil and paper when using _____
mental math.
#16 on pg. 350
The Wright family is traveling 536 miles on a vacation to Disney World.
They travel 284 miles in the morning before stopping for gas and snacks.
How many miles do the Wrights have left to travel until they arrive at Mickey's House (aka Disney World)?
252 miles
An algorithm for addition is to add from right to left, regrouping when necessary.
TRUE
9 x 9
81
Just making sure you still knew it!
What is mathmatical fluency?
Answers may vary.
Add
1, 903 + 2, 563=
4, 471
When is your Topic 7 Test?
Thursday the 25th. :)
Alfi puts 45 rocks in a display box.
He has 54 rocks in all.
Which expression can be used to find how many rocks are NOT in the display box?
54-45
Use mental math to add 332 and 154.
Which of these shows how to break apart the numbers into hundreds, tens and ones?
A- Break 332 into 320 +12. Break 154 into 125 +29
B - Break 332 into 100 +230 +2. Break 154 into 100+52 +2
C- Break 332 into 300 +16 +16. Break 154 into 100+27 +27
D- Break 332 into 300 +30 +2. Break 154 into 100+50+4
D
See # 20 on page 350
Abril wants to buy a game system and a game.
The system costs $239 and the game costs $29.
How much does Abril need to save to buy the game and the game system?
$268
Question # 18 on page 350
When adding 2,927 and 4,815, what place values need to be regrouped?
Ones and hundreds
2, 045 + 1, 300=
3, 345
Write an equation that represents the story, then solve.
A small box of goldfish crackers has 5 bags in it.
A large box has "G" times as many bags.
There are 45 bags in the large box.
A- 5 + 45= G, G= 50
B- 5 +G =45, G=40
C-5 x 45= G, G=225
D- 5 x G =45, G=9
There are 283 people at a parade. A newspaper reporter rounded the attendance to the nearest ten. How many people did the report say attended the parade?
280 people
FREE SPACE
CONGRATULATIONS!
Find #19 on Review pg 350
276 +84= ?
Draw a bar diagram to represent equation. Then solve for the unknown value.
EXPLAIN how you find the unknown value.
276 + 84= 360
I broke apart 84 into 24 and 60.
276+24= 300
300 + 60= 360
Estimate the sum of 425 and 113. Use an equation to justify your estimate.
430 +110 = 540
Henry believes the sum of 275+313 is 598.
Is Henry correct? Explain your answer.
No, Henry is not correct.
The sum of 275 +313 is 588. Henry did not add the digits in the tens place correctly.
Micah, Justice and Kayden are on the swim team. Look at the information below to find the distance in meters they swim at practice. How many meters did Justice and Kayden swim in all? Show your work.
Micah- 2, 525
Justice 1, 875
Kayden 2.095
3, 970 meters
See question number 8 on Topic 7 Review pg. 348
Find the sum of 337 and 285. Use place value and find the sums of the hundreds, tens and ones.
337 + 285
Use the Hundreds, tens and ones table to help you.
300 +200=500
30+80=110
7+5=12
500 +110+ 12= 622
Answer 622
Luke practiced his flue for 215 minutes last week and 78 minutes this week. How many minutes did Luke practice?
293 minutes