UCLAMP OPV Week 1 PM Sashi had 213 mini-erasers. Her brother gave her 49 mini-erasers. How many mini-erasers does Sashi have now? by Stefanie Mathewson https://padlet.com/smathewson2/xfe7iww8nc0adnhi Post a picture of how you think a student might solve the problem. Feel free to look at other strategies and leave a comment or question. Don't forget to take a quick break. en-us 2021-06-08 00:15:51 UTC 2026-03-06 13:02:42 UTC hello@padlet.com 213 + 49 bmo9707 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613081176 -1              +1
212     +    50 = 262]]> 2021-06-17 21:22:07 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613081176 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613081460 200 +50 =250
13-1=12
200+12= 210]]> 2021-06-17 21:22:26 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613081460 Take one from the sky https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613081512 213 + 49 plus 1 from the sky
213 + 50 = 263
Return the 1 to the sky
263 - 1 = 262]]> 2021-06-17 21:22:29 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613081512 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613082121 213+ 50 -1

249+ 10+ 3

200+10+3+40+9]]> 2021-06-17 21:23:05 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613082121 210+50=260 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613082178 (-3)     (+1)  2
260+2=262]]> 2021-06-17 21:23:09 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613082178 213 + 49 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613082446 2021-06-17 21:23:23 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613082446 212 + 50 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613082565 2021-06-17 21:23:29 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613082565 Sashi has 262 mini-erasers gxc1928 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613082631 200+40= 240 +10= 250
9+3= 12

250+12= 262]]> 2021-06-17 21:23:33 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613082631 Associative Property https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613082644 1) 213+49
=(212+1)+49
=212+(1+49)
=212+50
=262

2) 213+49
=(210 + 3) +49
=210+ (3+49)
=210+52
=262]]> 2021-06-17 21:23:34 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613082644 210+40+9+3 mxm8601 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613082679 2021-06-17 21:23:35 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613082679 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613082754 200 + 50 = 250 
250 + 13 = 263
263 - 1 = 262

Sashi has 262 mini erasers now.

]]> 2021-06-17 21:23:41 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613082754 213 + 49 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613082967 212 + 50]]> 2021-06-17 21:23:53 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613082967 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613083020 200 and 10 and 40 and 9 and 3
200 and 50 and 10 and 2
200 and 60 and 2]]> 2021-06-17 21:23:57 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613083020 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613083213 21 tens +4 tens = 25 tens
3 ones + 9 ones = 1 ten and 2 ones
26 tens and 2 ones = 262]]> 2021-06-17 21:24:08 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613083213 Lynn's way - decomposing and joining numbers https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613083232 2021-06-17 21:24:09 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613083232 200 + 10 + 3 gvillama https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613083428              40 + 9
200 + (10 + 40) + (3 + 9)
200 + (50) + (12)
200 + (50) + (10 + 2)
200 + (50 + 10) + 2
200 + 60 + 2 ]]> 2021-06-17 21:24:23 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613083428 212 + 50 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613083676 2021-06-17 21:24:32 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613083676 200+13+49= https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613084147

]]> 2021-06-17 21:25:03 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613084147 213+10+10+10+10+9= cpa0514 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613084328 2021-06-17 21:25:14 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613084328 212 + 50 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613084495 2021-06-17 21:25:24 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613084495 So what I did was... sxg1766 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613084594 -decomposed 213 into 200 and 13
-decomposed 49 into 40 and 9
- grouped 13 and 40
- skipped counted by 4 tens (40)
- added 9 more by combining the ones (3 and 9)
-added 50 and 12 to get 62
-added 200 and 62 to get 262]]> 2021-06-17 21:25:30 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613084594 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613084744 213 + 10
223+10
233+10
243+10
253+9
253+ (7+2)
(253+7) +2
260+2
262]]> 2021-06-17 21:25:40 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613084744 200 + 10 + 10 +10+10 +10+10 + 2 bmo9707 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613085034 2021-06-17 21:25:59 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613085034 213 - 1 = 212. 49 + 1= 50 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613085208 12 + 50= 62
200 + 62= 262]]> 2021-06-17 21:26:09 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613085208 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613085338 2021-06-17 21:26:17 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613085338 200+13+4 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613085447 2021-06-17 21:26:19 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613085447 200 + 10 + 3 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613086029 40 +9 ]]> 2021-06-17 21:26:38 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613086029 Give one away to make a friendly number https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613087090 2021-06-17 21:27:28 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613087090 tlb9693 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613087220 2021-06-17 21:27:37 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613087220 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613087530 2021-06-17 21:27:56 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613087530 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613087762 2021-06-17 21:28:11 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613087762 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613089374 2021-06-17 21:29:10 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613089374 A.O. https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613089375 2021-06-17 21:29:10 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613089375 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613092851 2021-06-17 21:32:35 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613092851 https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613093391 2021-06-17 21:33:04 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613093391 Place Value Disks https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613099677 2021-06-17 21:39:50 UTC https://padlet.com/smathewson2/xfe7iww8nc0adnhi/wish/1613099677