Add to Check
What is the addition problem and sum to check it?
50-17=33
33+17=50
Estimate to find the difference.
75-27=___
80-30=50
About 50
Chain Operation
68-10-3=___
75
35+21=
56
86-23=____
63
What addition problem would you use to check this?
98-5=93
93+5=98
56-35=___
60-40=20
About 20
Chain Operation
92-30+3=___
65
31+28=___
59
71-25
46
What addition problem would you use to check this?
64-27=37
37+27=64
Estimate to find the difference.
54-22=___
50-20=30
About 30
Use a table to solve.
Evie is making 4 Valentine's Day boxes. She places 4 hearts on each box. How many hearts does she need to make 4 boxes?
16 hearts
Maddy has 52 pop its. Kate gives her 25 more. How many pop its does Maddy have in all?
Maddy has 77 pop its.
Catherine has 37 murals to paint. She already painted 19 of them. How many murals does she have left to paint?
37-19=18 murals left to paint
What addition problem would you use to check this problem?
61-4=57
57+4=61
Huelon has 89 army men. Reed has 54. About how many more army men does Huelon have than Reed?
90-50= about 40 more army men
Make a table to solve.
Kingston is selling lemonade and he is making 5 posters. He is drawing 6 lemons on each poster. How many lemons will he need to draw for 5 posters?
30 lemons
Zaya made 63 cookies. Emma Rose made 28. How many cookies did they make altogether?
91
William has 33 pieces of blue paper and 26 pieces of red paper. How many more pieces of blue paper does he have than red?
33+26= 7 more pieces of blue paper
What addition problem do we use to check this?
93-34=59
59+34=93
Tatum has 35 horses. She gives about 15 to Kate. About about how many horses does Tatum have left?
40-20= about 20 horses left
Make a table to solve.
Daniel is making 7 bookmarks. On each bookmark he will be putting 3 stickers. How many stickers will he need for all 7 bookmarks?
21 bookmarks
Multi-Step Problem
Jackson and Annabelle both have 16 shells. Then Bryce picks up 27 more shells. How many do they have altogether?
Ava makes 40 paper butterflies. She gives 15 to Dalton. How many does she have left?
40-15=25 paper butterflies are left.