Vocabulary
How much a digit is worth based on it's location or place.
Place Value
27 rounded to the nearest 10.
30
76+89=
165
88-29=
59
Mrs. McKie baked 283 cookies on Friday. On Saturday she baked 187 cookies. How many more cookies did she bake on Friday than on Saturday?
96 more cookies
The answer in an addition problem.
Sum
124 rounded to the nearest 10.
120
127+183=
310
189-178=
11
Julia says that 367 + 429 is about 1,000. Do you agree or disagree?
I disagree because the sum is closer to 800.
The answer in a subtraction problem.
Difference
1,325 rounded to the nearest 10.
1,330
Estimate the answer for 258+387
650
600-241=
359
Which two numbers have a sum closest to 1,000?
327 482 600 398
600 + 398 is close to 1,000
The property that states the order of the addends doesn't change the sum.
Commutative Property of addition
2,344 rounded to the nearest 100.
2,300
127+320=125+____
322
625 - 48 = 630 -___
53
The third grade has 363 students. Over winter break, 94 students moved away, but 26 new students moved in. How many third graders are there now?
295 third graders
The meaning of each letter in C.U.B.E.S.
Circle the numbers and units,
Underline the question,
Box clue words,
Eliminate and evaluate,
Solve
12,478 rounded to the nearest hundred.
12,500
327+_____=42+641
356
___ - 270 = 727 - 268
729
Abel and Andrew collect cans to recycle. Abel has 275 cans and Andrew has 168 cans. On their way to the recycling center, their bag breaks and 89 cans fall out. How many cans do they have now?
354 cans