Mental Math (Subtract 10 and 100)
387-10
377
There are 537 boys and 438 girls at the concert. How many more boys than girls are at the concert?
537-438=99
723-354
369
863-561
302
347-69
278
245-100
145
Dex buys 243 beads at Betty's store. He uses 118 of them to make a bracelet. How many beads does Dex have left?
243-118=125
922-542
380
654-234
420
962-385
577
856-10
846
Tim had 545 legos. First, he gives 132 legos to a friend. Then he finds 47 more legos. How many legos does Tim have now?
545-132=413
413+47=460
754-365
389
679-245
434
824-316
508
617-100
517
Ginny buys 958 beads. 245 beads are blue. 309 beads are orange. 153 beads are white. The rest are red. How many red beads does Ginny buy?
251
804-348
456
999-663
336
863-489
374
845-100
745
Nico collected 235 coins. Amber collected 120 fewer coins than Nico. How many coins did they collect in all?
235-120=115
235+115=350
784-524
260
754-321
433
463-264
199