Estimation
451 502 346, 694, 831
451 and 502
27 rounded to the nearest 10.
What is 30?
76+89=
What is 165?
88-29=
What is 59?
Ms. Bates baked 283 cookies on Friday. On Saturday she baked 187 cookies. How many more cookies did she bake on Friday than on Saturday?
What are 96 more cookies on Friday?
What two numbers would you use to make a sum closest to 1000?
467, 802, 214, 303, 629
802
214
124 rounded to the nearest 10.
What is 120?
127+183=
What is 310?
189-178=
What is 11?
Najat says that 367 + 429 is about 1,000. Do you agree or disagree?
I disagree because the sum is closer to 800.
700
1,325 rounded to the nearest 10.
What is 1,330?
Estimate the answer for 258+387
What is 650?
600-241=
What is 359?
Which two numbers have a sum closest to 1,000?
327 482 600 398
What are 600 and 398?
Estimate the difference of 689-224 by rounding to the nearest hundred.
500
2,344 rounded to the nearest 100.
What is 2,300?
127+320=____
447
625 - 48 =
577
The fourth grade has 363 students. Over winter break, 94 students moved away, but 26 new students moved in. How many fourth graders are there now?
What are 295 fourth graders?
Estimate the sum of 1, 546+ 2,342 by rounding to the nearest hundred.
3,800
12,478 rounded to the nearest hundred.
What is 12,500?
____=342+641
983
727 - 268
459
Yusuf and Khadro collect cans to recycle. Yusuf has 275 cans and Khadro 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?
What are 354 cans?