3 Digit Addition
Draw a quick picture using base 10 blocks to show 354 + 163.
517
All together I have 234 CD's and DVD's. I have 120 CD's. How many DVD's do I have?
114 DVD's
245 + 361=
Which place value did you regroup?
606, tens
109 - 89 =
20
The zoo has 207 fish. They also have 117 birds. How many birds and fish do they have all together?
They have 323 all together.
775 + 139=
914
There are 854 rocks and shells. There are 243 shells. How many rocks are there?
611 rocks
345 - 160=
185
207 - 180 =
27
Sam wants to add 173 and 224. How could you draw a quick picture to show how to solve the problem?
3 Hundreds, 9 tens, 7 ones
208 + 467 =
675
465 - 223 =
242
332 - 267 =
65
306 - 137 =
169
At the store there are 742 packs of bubble gum. Sally bought 462 packs of bubble gum. How many packs of bubble gum are left at the store?
There is 280 packs of bubble gum left at the store.
3 9 9
+ 2 3 ?
_________
? ? 6
5, 3, 7
334 - 223=
111
List 3 steps to solving this problem and solve...
623 - 216=
407
1. I checked if I needed to regroup. More on the floor go next door.
2. I regrouped taking ten from the tens place and adding it to the ones.
3. I subtracted the numbers after I regrouped and got 407.
Draw a quick pic to show how to solve...
309-172.
137
The Mrs. Trembath's class collected 345 cans. Ms. DK's class collected 256 cans. How many more cans did Mrs. Trembath's class collect?
They collected 89 more cans.
Riley's Method to find the sum.
364
+217
---------
700
80
12
-------
Use his method to solve
364 +217
500+70+11=581
327- 137 =
Did you need to regroup?
Which place value?
190, yes, tens
Explain in 3 or more steps how to solve this problem....
618
-459
------------
159
1. I looked to see if I needed to regroup. I did with the ones and the tens place.
2. I regrouped the ones first.
3. Then I regrouped the tens.
4. I subtracted after I regrouped and got 159.
Explain how to solve the problem with at least 3 steps.
407-288=
119
1. I noticed I needed to regroup in the ones place and there is a zero in the tens.
2. i needed to regroup from the hundreds place. i regrouped to the tens and then to the ones.
3. i subtracted after I regrouped and got 119.
The library has 609 books on animals. 286 books are about cats. How many books are not about cats?
There are 323 that are not about cats.