Vocabulary
A letter that represents an unknown quantity.
Variable
39,491 + 56,356
95,847
6,763 - 5498
1,265
Estimate: 2,843 + 4,923 = ? (*hint* round each number to the thousands place, then add)
8,000
In the morning there were 58 pumpkins in a pumpkin patch. Seraphina took some and by the end of the day there were 21 pumpkins left. How many pumpkins were taken throughout the day?
37 pumpkins were taken throughout the day
A way of doing something in math. It is a set of steps that, if done correctly, always works.
Algorithm
10,252 + 1,298
11,550
71,395 - 6,627
64,768
3,256 + 1,982 = x (*hint* round each number to the thousands place, then add)
5,000
Jasmine and Tara are saving money to buy a scooter together. So far, they have $2,482 in their bank account. Jasmine has put in $1,139. How much money has Tara put into the bank account?
Tara has put in $1,343
You can use this to add numbers. Add one place value at a time, and then add those sums to find the total sum.
Partial Sums
5,917 + 9,352
15,269
19,516 - 2,921
16,595
Estimate: 3,701 + 1,812 + 2,085
8,000
Rick has $45,836 to give to three charities. He gives one charity $12,400. How much money does Rick have left for the remaining charities?
Rick has $33,436 left for the remaining charities
When you keep the front, or leftmost, digit and all other digits become zeros.
Front-end estimation
52,110 + 16,209
68,319
213,418 - 9951
203,467
Estimate: 18,801 + 61,290 (*hint* round to the ten thousands place, then add)
80,000
An office building sells for $350,000. A house nearby sels for $245,600. How much more does the office building sell for?
$104,400
To use place value to exchange equal amounts when renaming a number.
Regroup
688,411 + 120,281
Answer: 808,692
829,100 - 28,008
801,072
At OCASA, if there are 82 students in yellowband, 94 students in orangeband, and 98 students in redband, about how many students are there at OCASA? (*hint* round the tens place, then add)
270 students
A bakery sold 1,353 muffins on Friday and 2,231 muffins on Saturday. How many muffins did the bakery sell?
3,584 muffins