Addition
Add:
841 + 218
1,059
Subtract:
81 - 32
49
Subtract:
100 - 42
58
Estimate:
321 + 432
300+400=700
Solve using mental math:
700 - 399
301
Olivia and Carolyn make 10 clay figures. Each figure takes them 5 minutes to make. How long does it take them to make all 10?
50 minutes
Add:
1,431 + 662
2,093
Subtract:
982 - 491
491
Subtract:
8,400 - 595
7,805
Estimate:
831 - 553
800-600=200
Solve using mental math:
58 + 32
90
Evelynn loves to sing. If each song she sings is 3 minutes long, how many songs can she sing in 27 minutes
9 songs
Add:
4,941 + 3,279
Subtract:
3,210 - 1,515
1,695
Subtract:
19,222 - 10,434
8,788
Estimate:
3,213 + 3,930
3,000+4,000=7,000
Solve using mental math:
315 + 32
347
Winnie & Harper like to tumble outside. If it takes them 8 minutes to learn a new trick, how many tricks can they learn in 32 minutes?
4 tricks.
Add:
12,943 + 19,498
32,441
Subtract:
49,312 - 5,555
43,757
Subtract:
800,000 - 43,521
756,479
Estimate:
1,632 - 1,324
2,000 - 1,000 = 1,000
Solve using mental math:
100,000 - 39,999
60,001
Brooks and London play outside at recess together. If recess is 20 minutes each day, how long did they spend playing at recess during a whole school week?
100 minutes (1 hour 40 minutes)
Add:
392,392 + 787,787
1,180,179
Subtract:
594,333 - 422,999
171,334
Subtract:
1,000,000 - 123,456
876,544
Estimate:
4,541 - 3,458
5,000 - 3,000 = 2,000
Solve using mental math:
431 + 311
742
Hudson is a fast runner. If he can run 15 feet in 6 seconds, how far can he run in 30 seconds? (Assuming he doesn't get tired!)
60 feet