Numbers Concepts - Lesson 1

1. Mathematics
Number Concepts: A Review
Prepared by Aba Kamau

2. Numbers
Objectives:
• Students must be able to count sequentially within 1000
• Students must demonstrate math vocabulary competence in the following
words – backward, forward, skip-count, hundred, thousand, estimate,
increase, decrease, ascending, descending, sequence, notation, verify, value,
amount, money, currency, equal, equivalent, rounding.

3. Exercise 1
Copy the table and fill in the missing numbers
101 102 103 104 105 108 109 110
101 112 113 114 116 118 120
121 122 124 128 129
134 135 137 139
141 143 144 146 148 150
152 155 157
161 163 165 166 168 170
172 173 176 179 180
191 192 194 195 197 198 200

4. Exercise 2
Copy the table and fill in the missing numbers
(rellenar los números que faltan)
201 204 205 209 210
211 212 214 216 218
222 223 224 227 229 230
233 235 236 238
241 242 244 247 249
252 255 256 258 260
261 263 264 266 269
272 273 275 277 280
291 292 294 296 299

5. Counting Words
• Backward (hacia atrás) – to go in reverse (marcha
atrás) from where you started
• Example (ejemplo): 10, 9, 8, 7, 6, 5, ……..

6. Counting Words
• Forward (adelante) –
• Example (ejemplo) : 1, 2, 3, 4, 5, ……..

7. Counting
Words
• Skip-count (cuenta
de saltos)
• Example (ejemplo):
Skip 1s and count in 2s

8. Counting Words
• Estimate (estimar) – to calculate (cuantificar)
something
• Example (ejemplo): 2 + 3 = 5

9. Counting Words
• Sequence (secuencia) – ordered set of numbers,
shapes, or other objects, using a rule.
• Example (ejemplo): Review skip-counting (revisión
cuenta de saltos)

10. Activity
• Let’s play a game of skip-counting
• Rules: students place themselves into groups in order of 2s and 5s in that
order then repeat to form a sequence or pattern.

11. Home
Work
Let’s watch
this video
then do the
work on
next slide. • Press the play button

12. Home Work
Count forward in 1s and fill in the missing numbers (contar hacia
adelante en unidades y completar los números que faltan).
302 303 305 308 310
311 313 316 317 319
322 330
331 334 335 337 339
342 343 346 348
351 360
363 364 367 369
372
381 383 385 386 388 390
392 394 397 399

13. Home Work
Count forward in 1s and fill in the missing numbers in your workbook
(contar hacia adelante en unidades y completar los números ).
401 403 405 407 410
412 414 416 418 419
421 423 425 427 430
441 442 444 445 446 448 449
453 454 456 457 460
462 465 468 469
471 473 476 477 480
482 484 488
491 493 495 497 499

14. References
• Text – Egan McCallister, Progressive Mathematics for Primary Schools Book 2.
Caribbean Tutorial Publishing Co. Ltd. 2018: p 2-3
• http://www.amathsdictionaryforkids.com/qr/p/pattern.html
• https://www.youtube.com/watch?v=JtjCZ9EP1cE