Unit Review: Rounding & estimating

C.1Round each number.

1. 1
   Round $312$ to the nearest ten.
2. 2
   Round $53$ to the nearest ten.
3. 3
   Round $94$ to the nearest ten.
4. 4
   Round $85$ to the nearest ten.

C.2Round each number.

1. 5
   Round $6,917$ to the nearest hundred.
2. 6
   Round $5,248$ to the nearest hundred.

C.2C.3Round each number. (continued)

1. 7
   Round $1,371$ to the nearest hundred.
2. 8
   Round $723$ to the nearest hundred.
3. 9
   Round $2,358$ to the nearest ten.
4. 10
   Round $9,507$ to the nearest ten.
5. 11
   Round $794$ to the nearest ten.
6. 12
   Round $323$ to the nearest ten.

C.4C.5C.6Round each number to the place shown, then estimate.

1. 13
   Nearest hundred: $505+198$
2. 14
   Nearest ten: $91+53$
3. 15
   Nearest hundred: $735+293$
4. 16
   Nearest hundred: $912+547$
5. 17
   Nearest hundred: $695-452$
6. 18
   Nearest ten: $91-68$
7. 19
   Nearest ten: $91-29$
8. 20
   Nearest hundred: $375-141$
9. 21
   Nearest ten: $995-656$
10. 22
    Nearest ten: $779-396$
11. 23
    Nearest ten: $993-977$
12. 24
    Nearest ten: $358-199$

C.1Round to the Nearest Ten

1. 1310
2. 250
3. 390
4. 490

C.2C.3Round each number.

1. 56,900
2. 65,200
3. 71,400
4. 8700
5. 92,360
6. 109,510
7. 11790
8. 12320

C.4C.5C.6Round each number to the place shown, then estimate.

1. 13$500+200=700$
2. 14$90+50=140$
3. 15$700+300=1,000$
4. 16$900+500=1,400$
5. 17$700-500=200$
6. 18$90-70=20$
7. 19$90-30=60$
8. 20$400-100=300$
9. 21$1,000-660=340$
10. 22$780-400=380$
11. 23$990-980=10$
12. 24$360-200=160$