Subtraction with up to two decompositions
699 - 210 =
699 - 210 = 489
If 762 - ______ = 173, then 173 + 589 = _______
Draw a number bond to represent the related facts
If 762 - 589 = 173, then 173 + 589 = 762
Use the simplified strategy to solve
500 - 219 =
499 - 218 = 281
274 - 76 =
198 + 76 = 274
200 -123 = _____
200 -123 = 77
758 - 387 =
758 - 387 = 371
If 631 - ______ = 273, then _____ + 217 = 631
Draw a number bond to represent the related facts
If 631 - 358 = 273, then 358 + 273 = 631
Use the simplified strategy to solve
400 - 127 =
399 - 126 = 273
439 - 176 =
176 + 263 = 439
600 - 432 = _____
600 - 432 = 168
913 - 558 =
913 - 558 = 355
If 541 - ______ = 378, then _____ + 378 = 541
Draw a number bond to represent the related facts
If 541 - 163 = 378, then 163 + 378 = 541
Use the simplified strategy to solve
300 - 178 =
299 - 177 = 122
851 - 362 =
362 + 489 = 851
700 - 543 = _____
700 - 543 = 157
788 - 299 =
788 - 299 = 489
If 900 - ______ = 418, then _____ + 418 = 900
Draw a number bond to represent the related facts
If 900 - 482 = 418, then 482 + 418 = 900
Use the simplified strategy to solve
500 - 286 =
499 - 287 = 212
542 - 174
174 + 368 = 542
800 - 409 = _____
800 - 409 = 391
821 - 523 =
821 - 523 = 298
If 700 - ______ = 376, then _____ + 376 = 700
Draw a number bond to represent the related facts
If 700 - 324 = 376, then 324 + 376 = 700
Jason said that a simplified strategy for 800 - 378 is 799 - 377. Solve both problems to show that Jason's strategy is correct
800 - 378 = 422
799 - 377 = 422
729 - 471 =
471 + 248 = 729
900 - 606 = ______
900 - 606 = 294