Nearest 10
Round 667 to the Nearest Ten
670
Round 766 to the nearest 100
800
Solve this addition problem:
780 + 289 =
780 + 289 = 1,069
(Round the to the nearest 10)
432 + 639 = s
432 rounds to 430
639 rounds to 640
430 + 640 = s
430 + 640 = 1,170
Write an addition problem that has the same sum as 438 + 212
Use the GIVE AND TAKE strategy:
Take away 2 from 212: 212-2= 210
Give that 2 to the other number, 438:
438 + 2 = 440
440 + 210 = 650
(438 + 212 = 650)
Round 228 to the nearest ten
230
Round 429 to the nearest 100
400
Solve this subtraction problem:
238 - 219 =
238 - 219 = 19
Estimate the sum:
(Round the to the nearest 100)
445 + 129 = s
445 rounds to 400
129 rounds to 100
400 + 100 = 500
Write a subtraction problem that has the same difference as 123 - 109
CONSTANT DIFFERENCE
Take 9 away from both numbers
123 - 9 = 114
109 - 9 = 100
114 - 100 = 14
(123 - 109 = 14)
Round 314 to the nearest ten
310
Round 535 to the nearest hundred
500
Solve this addition problem:
285 + 589 =
285 + 589 = 874
Estimate the sum:
(Round the to the nearest 10)
219 + 226 = s
219 rounds to 220
226 rounds to 230
220 + 230 = 450
Write an addition problem that has the same sum as 236 + 114
GIVE AND TAKE
Take 4 from 114: 114 - 4 = 110
Give that 4 to the other number, 236: 236 + 4 = 240
240 + 110 = 350
(236 + 114 = 350)
Round 445 to the nearest ten
450
Round 854 to the nearest hundred
900
Solve this subtraction problem:
280 - 127 =
280 - 127 = 153
Estimate the sum:
(Round the to the nearest 100)
528 + 376 = s
528 rounds to 500
376 rounds to 400
500 + 400 = 900
Write a subtraction problem that has the same difference as 436 - 208
CONSTANT DIFFERENCE
Take 8 away from each number
436 - 8 = 428
208 - 8 = 200
428 - 200 = 228
(436 - 208 = 228)
Round 1,765 to the nearest ten
1,770
Round 980 to the nearest hundred
1,000
Solve this subtraction problem:
874 - 456 =
874 - 456 = 418
Estimate the sum:
(Round the to the nearest 10 and nearest 100)
283 + 218 = s
Tens place:
283 rounds to 280, 218 rounds to 220
280 + 220 = 300
Hundreds place:
283 rounds to 300, 218 rounds to 200
300 + 200 = 500