Tens
78
80
450
500
1, 092
1,000
33, 357
30,000
672
133
130
642
600
3, 629
4,000
67,921
Subtract 100 less to 782
682
566
849
800
10, 091
81,462
5+3= 8
3+5= 8
What is the name of this property?
Commutative Property
1,838
1,840
1,560
1,600
29, 926
89, 938
90,000
8+ (3+1)= 12
3+ (1+8)= 12
What is the name of this property?
Yesterday, the cafeteria served 995 lunches. Round the number of lunches to the nearest ten.
1,000
Julian S is getting ready to celebrate his birthday. He needs enough pizzas to feed all his friends. If he invites 1,872 people, about how many pizzas should he order. (Round to the nearest hundred).
1,900 pizzas
On St. Patricks Day, Ansem recieved 31, 577 coins from the mysterious Irish Leprechaun. About how many coins did Ansem get? (Round to the nearest thousand).
32,000 coins
Julio is studying for his upcoming Math test. One question asks him to round 45,772 to the nearest ten-thousand. Julio thinks the answer is 40,000. Is Julio correct? If not, what is the correct answer?
50,000
Ms. Silva wants her students to have excellent mental math skills. She asks them to add 1,000 and subtract 1,000 from the number 4,500. Can the students of this morning's Math class solve this problem to prove themselves?
Add 1,000: 5,500
Subtract 1,000: 3,500