Mental Math - Addition
45+27
72
52-18
34
If Sarah has 12 apples and buys 15 more, how many apples does she have now?
27 apples
Round 34 to the Nearest 10
30
What is the next number in the pattern: 4, 8, 12, 16, __?
20
123+57
180
96-37
59
A box has 37 pencils. If 12 pencils are used, how many are left in the box?
25
Round 78 to the Nearest 10
80
Complete the sequence: 30, 27, 24, 21, __?
18
564+349
913
865-756=
100
There are 482 seats in a theater. If 156 people leave during intermission, how many people are still in the theater?
326
What place value is the 7 in 271
tens
100, 90, 80, 70, __?
60
820+127
947
1,500-789
711
A baker makes 340 cupcakes in the morning and 275 more in the afternoon. If she sells 429 cupcakes, how many does she have left?
186
Write this number in expanded form:
421
400 + 20 + 1
25, 50, 75, __, 125.
100
1,234+678
1,912
2,000-867
1,133
A bus has 425 passengers. At the next stop, 158 passengers get off and 243 get on. How many passengers are on the bus now?
510
Estimate 348 + 279 by rounding to the nearest hundred.
600
Find the missing number: 100, 80, 60, __, 20.
40