Rounding
Round 27 to the nearest ten
30
Estimate the difference for 46 - 32 by rounding to the nearest ten.
Tens: 50 - 30 = 20
Estimate the sum by rounding to the nearest tens place: 67 + 83 = ______
Tens: 70 + 80 = 150
347 + 157 = 157 + 347
Communicative
Round 97 to the nearest ten
100
Estimate the difference by rounding to the nearest hundred: 788 - 564 = ____
Hundred: 800 - 600 = 200
Estimate the sum by rounding to the nearest hundred: 245 + 312 = _______
Hundreds: 200 + 300 = 500
(5 + 8) + 12 = 8 + (5 + 12)
Associative
Round 267 to the nearest ten
270
Estimate the difference by rounding to the nearest tens place: 555 - 234 = ______
Tens: 560 - 230 = 330
Estimate the sum by rounding to the nearest tens place: 389 + 211 = _____
Tens: 390 + 210 = 600
689 + 0
Identity
Round 675 to the nearest ten and hundred
Ten: 680
Hundred: 700
Estimate the difference by rounding to the nearest hundreds place: 832 - 178 = ______
Hundreds: 800 - 200 = 600
Estimate the sum by rounding to the nearest hundreds place: 298 + 592 = _____
Hundreds: 300 + 600 = 900
91 + 408 = 408 + 91
Communicative
Round the minuend and the subtrahend to the nearest ten and hundred: 756 - 342
Ten: 760 - 340
Hundred: 800 - 300
Estimate the difference rounding to the nearest hundred and the nearest ten: 643 - 387 = _____
Tens: 640 - 390 = 250
Hundreds: 600 - 400 = 200
Estimate the sum by rounding to the nearest hundreds and tens place: 421 + 476 = _____
Tens: 420 + 480 = 900
Hundreds: 400 + 500 = 900
(50 + 60) + 40 = 50 + (60 + 40)
Associative