Unit Review: Estimation

C.1C.2C.3Round each number to the place shown, then estimate.

1. 1
   Nearest thousand: $8,597-2,607$
2. 2
   Nearest thousand: $1,047+8,447$
3. 3
   Nearest thousand: $9,767-1,658$
4. 4
   Nearest hundred: $6,626-4,206$
5. 5
   Nearest ten: $11\times 5$
6. 6
   Nearest ten: $41\times 7$
7. 7
   Nearest ten: $65\times 5$
8. 8
   Nearest ten: $22\times 8$
9. 9
   Nearest hundred: $198+278$
10. 10
    Nearest hundred: $346+484$
11. 11
    Nearest hundred: $812+408$
12. 12
    Nearest hundred: $966+711$

C.1C.2C.3Round each number to the place shown, then estimate.

1. 1$9,000-3,000=6,000$
2. 2$1,000+8,000=9,000$
3. 3$10,000-2,000=8,000$
4. 4$6,600-4,200=2,400$
5. 5$10\times 5=50$
6. 6$40\times 7=280$
7. 7$70\times 5=350$
8. 8$20\times 8=160$
9. 9$200+300=500$
10. 10$300+500=800$
11. 11$800+400=1,200$
12. 12$1,000+700=1,700$