Round It!
Round 47 to the nearest ten.
50
62 + 21 ≈ ?
60 + 20 = 80
A snack costs $1.87. About how much for 2 snacks?
$2 × 2 = $4
29 + 51 → 30 + 50 or 29 + 49?
30 + 50 = 80
83 × 9 ≈ ?
80 × 10 = 800
Round 583 to the nearest hundred.
600.
142 + 67 ≈ ?
140 + 70 = 210
A bus holds 57 students. About how many on 2 buses?
60 x 2 = 120.
398 + 257 → 400 + 300 or 390 + 260?
390 + 260 = 650
198 + 402 ≈ ?
200 + 400 = 600
Round 3,298 to the nearest thousand.
3000.
281 + 179 ≈ ?
280 + 180 = 460
A pair of shoes costs $67. About how much would 3 pairs cost?
$70 × 3 = $210
742 + 189 → 700 + 200 or 740 + 190?
740 + 190 = 930
742 − 389 ≈ ?
740 − 390 = 350
Round 7,846 to the nearest hundred.
7,800.
402 + 398 ≈ ?
400 + 400 = 800
A movie is 94 minutes long. About how many hours?
About 1½ hours
1,492 + 789 → 1,500 + 800 or 1,400 + 800?
1,500 + 800 = 2,300
122 × 48 ≈ ?
120 × 50 = 6,000
Round 12,493 to the nearest thousand.
12,000.
2,698 + 3,203 ≈ ?
2,700 + 3,200 = 5,900
A library has 1,492 books in English and 789 in French. About how many in total?
1,500 + 800 = 2,300
2,398 + 5,612 → 2,400 + 5,600 or 2,000 + 6,000?
2,400 + 5,600 = 8,000
487 × 6 ≈ ?
490 × 6 = 2,940
or
500 × 6 = 3,000