2. 451 452 453 454 449 455 450 448 447 446 445 444 443 442 441 440 435 436 437 438 439 430 434 433 432 431 429 428 427 426 425 Click to Start Here Click to Start Here Click to Start Here Click to Start Here Round 447 to the nearest tens. See if you can click the red start buttons to land in the valley where 447 is rounded to the nearest tens. Rounding Roller Coaster By Joe Hart 2012 joe.hart@clayton.k12.ga.us http://heritagekids.info/5.htm Click here to begin Click here to enter your name.

3. 31 32 33 34 29 35 30 28 27 26 25 24 23 22 21 20 15 16 17 18 19 10 14 13 12 11 9 8 7 6 5 Round 33 to the nearest tens. See if you can click the red start buttons to land in the valley where 33 is rounded to the nearest tens. Correct! Click here to continue. Note to the Teacher: The answer to this slide will be in the third valley.

4. 41 42 43 44 39 45 40 38 37 36 35 34 33 32 31 30 25 26 27 28 29 20 24 23 22 21 19 18 17 16 15 Round 16 to the nearest tens. See if you can click the red start buttons to land in the valley where 16 is rounded to the nearest tens. Correct! Click here to continue. Note to the Teacher: The answer to this slide will be in the first valley.

5. 51 52 53 54 49 55 50 48 47 46 45 44 43 42 41 40 35 36 37 38 39 30 34 33 32 31 29 28 27 26 25 Round 42 to the nearest tens. See if you can click the red start buttons to land in the valley where 42 is rounded to the nearest tens. Correct! Click here to continue. Note to the Teacher: The answer to this slide will be in the second valley.

6. 151 152 153 154 149 155 150 148 147 146 145 144 143 142 141 140 135 136 137 138 139 130 134 133 132 131 129 128 127 126 125 Round 139 to the nearest tens. See if you can click the red start buttons to land in the valley where 139 is rounded to the nearest tens. Correct! Click here to continue. Note to the Teacher: The answer to this slide will be in the second valley.

7. 91 92 93 94 89 95 90 88 87 86 85 84 83 82 81 80 75 76 77 78 79 70 74 73 72 71 69 68 67 66 65 Round 74 to the nearest tens. See if you can click the red start buttons to land in the valley where 74 is rounded to the nearest tens. Correct! Click here to continue. Note to the Teacher: The answer to this slide will be in the first valley.

8. 61 62 63 64 59 65 60 58 57 56 55 54 53 52 51 50 45 46 47 48 49 40 44 43 42 41 39 38 37 36 35 Round 51 to the nearest tens. See if you can click the red start buttons to land in the valley where 51 is rounded to the nearest tens. Correct! Click here to continue. Note to the Teacher: The answer to this slide will be in the second valley.

9. 81 82 83 84 79 85 80 78 77 76 75 74 73 72 71 70 65 66 67 68 69 60 64 63 62 61 59 58 57 56 55 Round 55 to the nearest tens. See if you can click the red start buttons to land in the valley where 55 is rounded to the nearest tens. Correct! Click here to continue. Note to the Teacher: The answer to this slide will be in the first valley.

10. 271 272 273 274 269 275 270 268 267 266 265 264 263 262 261 260 255 256 257 258 259 250 254 253 252 251 249 248 247 246 245 Round 273 to the nearest tens. See if you can click the red start buttons to land in the valley where 273 is rounded to the nearest tens. Correct! Click here to continue. Note to the Teacher: The answer to this slide will be in the third valley.

11. 451 452 453 454 449 455 450 448 447 446 445 444 443 442 441 440 435 436 437 438 439 430 434 433 432 431 429 428 427 426 425 Round 447 to the nearest tens. See if you can click the red start buttons to land in the valley where 447 is rounded to the nearest tens. Correct! Click here to continue. Note to the Teacher: The answer to this slide will be in the third valley.

12. Click here to check your score.