Addition
Solve 89 + 12.
What is 101?
Solve 99 - 17.
What is 82?
True or False?
Estimating and Rounding are the same thing.
False
True or false?
91 + 82 = 82 + 91
True
FAST FACT!
254 + 10 =
What is 264?
Solve 141 + 76.
What is 217?
What do you do when there are more on the floor?
Go next door and get 10 more!!!
Why do we estimate?
when we do not need an exact answer
True or False?
99 - 12 = 12 - 99
False
FAST FACT!
372 - 100
What is 272?
JJ had 160 pieces of candy. Natalie gave him 139 more pieces of candy. How many pieces of candy does JJ have all together?
What is 299?
Solve 402 - 381.
What is 21?
Round to the nearest 10, then solve.
55 + 21 =
What is 80?
120 + ______ = 201
What is 81?
Which is more accurate, rounding to the tens or hundreds place?
Tens
Solve 796 + 482.
What is 1,278?
What is 246?
Round to the nearest 10, then solve.
567 + 189
What is 760?
Find the missing numbers.
______ - 453 = 234
What is 687?
Round 1,906 to the nearest tens place.
What is 1,910?
Use any strategy to solve.
566 + 271
What is 837?
Use any strategy to solve.
734 - 428
What is 306?
Round to the nearest 100, then solve.
693 - 428
What is 300?
(700 - 400 = 300)
1,834 - ______ =755
What is 1,079?
Which two problems are equal?
1. 562-253
2. 422 - 181
3.683 - 524
4. 962 -848
What is 3. and 4.?