Mental Math
72+10
82
35 + 23
58
46-14
32
There were 10 birds on a tree. 5 more birds came to the tree. How many birds are there now?
There are 15 birds now.
24 + 21
45
83+100
183
35+25
60
20-12
8
Martha had 27 pencils. She gave 9 to her friend. How many pencils does she have left?
She has 21 pencils left.
65 - 32
33
65+40
105
27+46
73
34-25
9
There are 26 cats at the pet shop. There are 32 more dogs than cats. How many dogs are there?
There are 58 dogs.
39 + 27
66
85+42
127
53+19
72
25-18
7
There are 73 pieces of pizza. 28 are pepperoni and the rest are cheese. How many pieces of cheese pizza are there?
There are 45 pieces of cheese pizza.
84 - 25
59
127+___=167
40
44+27
71
53-29
23
There are 47 blue birds. There are 29 less blue birds than red birds. How many red birds are there?
125 + 38
163