반올림과 어림셈 단원 종합

C.1Round each number.

1. 1
   Round $49$ to the nearest ten.
2. 2
   Round $577$ to the nearest ten.
3. 3
   Round $27$ to the nearest ten.
4. 4
   Round $69$ to the nearest ten.

C.2Round each number.

1. 5
   Round $6,414$ to the nearest hundred.
2. 6
   Round $7,306$ to the nearest hundred.

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

1. 7
   Round $452$ to the nearest hundred.
2. 8
   Round $4,564$ to the nearest hundred.
3. 9
   Round $201$ to the nearest ten.
4. 10
   Round $9,541$ to the nearest ten.
5. 11
   Round $2,373$ to the nearest hundred.
6. 12
   Round $9,311$ to the nearest hundred.

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

1. 13
   Nearest ten: $16+89$
2. 14
   Nearest hundred: $481+254$
3. 15
   Nearest ten: $19+83$
4. 16
   Nearest ten: $11+38$
5. 17
   Nearest hundred: $696-129$
6. 18
   Nearest ten: $91-79$
7. 19
   Nearest hundred: $963-375$
8. 20
   Nearest ten: $97-82$
9. 21
   Nearest ten: $867-353$
10. 22
    Nearest hundred: $922-297$
11. 23
    Nearest hundred: $427-303$
12. 24
    Nearest hundred: $210+564$

C.1Round to the Nearest Ten

1. 150
2. 2580
3. 330
4. 470

C.2C.3Round each number.

1. 56,400
2. 67,300
3. 7500
4. 84,600
5. 9200
6. 109,540
7. 112,400
8. 129,300

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

1. 13$20+90=110$
2. 14$500+300=800$
3. 15$20+80=100$
4. 16$10+40=50$
5. 17$700-100=600$
6. 18$90-80=10$
7. 19$1,000-400=600$
8. 20$100-80=20$
9. 21$870-350=520$
10. 22$900-300=600$
11. 23$400-300=100$
12. 24$200+600=800$