Addition
25+31
56
28-16
12
348 in written form
Three hundred forty eight
114 birds were sitting in a tree. 21 more birds flew up to the tree. How many birds were there altogether in the tree?
114 + 21 = 135 There were 135 birds in the tree.
38+17
55
59-36
23
265 in expanded form
200+60+5
29 birds were sitting in a tree. Some more fly up to the tree. Then there were 142 birds in the tree. How many more flew up to the tree?
142 – 29 = 113 113 more birds flew up to the tree.
112+41
153
165-34
131
400+30+9 in written form
Four hundred thirty nine
Beth has 74 crayons. She gives 25 of them away to Jen. How many crayons does Beth have left?
74 – 25 = 49 Beth has 49 crayons left.
225+344
569
375-224
151
625 in unit form
6 hundreds 2 tens 5 ones
Cindy’s mom baked 41 cookies. Paul’s dad baked 38 cookies. Cindy and Paul ate 6 cookies each and then brought them to school for a party. How many cookies did they bring to school altogether?
41 + 38 – 6 – 6 = 67 They brought 67 cookies to school altogether.
384+127
511
789-456
333
1 hundred 4 tens 16 ones in standard form
156
There were 44 boys and 53 girls on the playground at recess. Three girls were called into the school before the bell rang. How many children were on the playground when the bell rang?
44 + 53 – 3 = 94 There were 94 children on the playground when the bell rang.