Finding the Sum!
Use a strategy to find 153+124
277
Use a strategy to find 255-131
124
Find 109+38. Then subtract from 300.
109+38=147
300-147=153
What method of adding/subtracting does Miss. Whitt never want to see us using?
Stacking!
If I see the word "sum" in the problem...that means I should.....
Add!
Use a strategy to find 308+275
583
Use a strategy to find 400-257
143
Find 211+108. Then subtract from 400.
211+108=319
400-319=81
What THREE strategies can I use for adding?
Number Lines, Place Value Blocks, Expanded Form
When a problem asks me to "find the difference...", that means I need to...
Subtract!
Use a strategy to find 104+163+78
345
Use a strategy to find 500-309
191
Find 215+168+46. Then subtract from 500.
215+168+46=429
500-429=71
What TWO strategies can I use for subtracting?
a) 123 + 34 -> (100 +20)+(30)+(3+4)
b) 328 + 244 -> (300 +200)+(20+40)+(8+4)
c) 215 + 309 -> (200)+(10)+(5+9)
d) 119 + 276 -> (100+70)+(200+10)+(9+6)
b) 328 + 244 -> (300 +200)+(20+40)+(8+4)