Expanded From to Add
24 + 57
20 + 50= 70
4 + 7=11
70 + 11= 81
10 + 20=
30
40-30=
10
Austin has 4 packs of toy cars. Each pack has 3 toy cars. He gives two to is hist. How many cars does he have left?
10
85 + 39=
80 + 30 = 110
5 + 9= 14
110 + 14= 124
55+45=
100
56-27
29
Miss Zinger buys 24 cookies at Wegmans. The cookies are in packs of 6. Miss Zinger gives one package to Mrs. Henty, another to Mrs. Kocher, and one to Miss Murphy. How many packs does Miss Zinger have for herself?
1
657 + 238=
600 + 200= 800
50 + 30= 80
7 + 8= 15
800 + 80 + 15= 895
235+264=
499
854-278
576
Allie buys 9 rolls of tickets at the fair. She uses 46 tickets for rides and has 26 tickets left. How many tickets were in each roll to start?
A. 4 B. 11
C. 8 D. 17
Estimate first then solve
736 + 129
Estimate: 740 + 130= 870
700 + 100= 800
30 +20= 50
6+9= 15
800+50+15= 865
First estimate then solve:
897 + 54=
Estimate: 900 + 50= 950
Actual answer: 951
First estimate then solve:
786-213=
Estimate: 790-210= 580
Actual answer: 573
The third graders have 350 pens and pencils in the school store. They sell 57 pencils and 37 pens. How many pens and pencils are left in the store?
256
5,879 + 3,637=
5,000 + 3,000= 8,000
800+600= 1,400
70+30= 100
9+7= 16
8,000 + 1,100 + 100 + 16= 9,516
First estimate the solve:
311+206
Estimate: 310 + 200= 510
Actual answer: 517
First estimate the solve:
985- 896=
Estimate: 990-900= 90
Actual Answer: 89
James has 68 movies. He gives 12 movies to his brother. James puts the rest of the movies in 8 equal rows. How many movies are in each row?
7