Estimation
Estimate to find the difference.
75-27=___
80-30=50
About 50
Mrs. Bell found 2 quarters on the playground and Mrs. Osterbind found one. What is the total amount of money found on the playground?
75 cents.
35+21=
56
86-23=____
63
56-35=___
60-40=20
About 20
95 - 30 =
65
31+28=___
59
71-25
46
Estimate to find the difference.
54-22=___
50-20=30
About 30
Nora has 46 stickers. She keeps 30 for herself and gives some to Violet. How many stickers did she give to Violet?
16 stickers.
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
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
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 in all?
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
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
How many bookmarks does Mrs. Osterbind need to buy if she wants to give each of her students a bookmark as a prize for being the best 2nd grade class at Spring Run?
21 bookmarks (or 22 if she includes Case!)
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.