Joan needs 45 shells for her project. She has 28 shells. How many more shells does she need?
45-28=17 more shells
200
Find the difference.
36-25=?
11
200
Estimate the Difference.
68-39
70-40=30
200
Subtract. Add to Check.
82-69
82-69=13
13+69=82
200
Add or subtract from left to right.
49-2-30=?
17
200
Marc has 27 markers. He gives 7 markers to a friend. His mother gives him 38 markers. how many markers does Marc have now?
27-7=20
20+38=58
58 markers now
300
Find the Difference.
26-19=?
7
300
Estimate the Difference.
53-38
50-40=10
300
Subtract. Add to Check.
40-22
40-22=18
22+18=40
300
Add or subtract from left to right.
65-30+5=?
40
300
Sue makes 7 crowns for her sister's party. She glues 5 triangles on each crown. How many triangles does she use?
35
400
Find the difference.
44-26=?
18
400
Estimate the Difference.
88-13
90-20=70
400
Subtract. Add to Check.
93-34
93-34= 59
34+59=93
400
Add or subtract from left to right.
20+5-25=?
0
400
Susan has 58 blue stones for her project. Ross has 15 more blue stones than Susan. Ross also has 20 purple stones. How many stones does Ross have altogether?
58+15=73
73+20=93
93 Stones
500
Find the Difference.
63-35=?
28
500
Estimate the Difference.
41-16
40-20=20
500
Subtract. Add to Check.
74-36
74-36=38
36+38= 74
500
Add or subtract from left to right.
20+48-4=?
64
500
Jane and Ben each had 70 stickers. Jane has 34 left and Ben has a dozen left. How many stickers did each use?