Estimating Sums and Differences Worksheet

**Page 1**

1.

Tim scored 466 points and his friend scored 321. About how many points they scored together? Round to the nearest hundred.

a. | 1,000 | ||

b. | 800 | ||

c. | 600 | ||

d. | 900 |

Correct answer : (2)

2.

A tailor bought 725 buttons. He used 478 buttons. About how many buttons are still there?

a. | 100 | ||

b. | 1,200 | ||

c. | 200 | ||

d. | 400 |

Correct answer : (3)

3.

Tommy deposited $812 and $582 in a bank in the past two months. Estimate the amount in his account to the nearest hundred.

a. | $1,200 | ||

b. | $1,400 | ||

c. | $1,300 | ||

d. | $1,500 |

Correct answer : (2)

4.

There are 357 tickets to be sold for a fundraiser show. Bill sold 226 of them. Round the number of tickets still left to be sold, to the nearest ten.

a. | 110 | ||

b. | 120 | ||

c. | 140 | ||

d. | 130 |

Correct answer : (4)

5.

Miller bought appliances for his new home. He bought a stove for $875, furniture for $536, and dryer for $309. Which is the best estimate of the total that he paid for appliances?

a. | $2,000 | ||

b. | $1,600 | ||

c. | $1,700 | ||

d. | $1,500 |

Correct answer : (3)

6.

John saved $79. His sister saved $26 more than John. Which is the best estimate of the amount of money that John′s sister had saved?

a. | $110 | ||

b. | $50 | ||

c. | $80 | ||

d. | $90 |

Correct answer : (1)

7.

Mathew′s collection has 220 red marbles, 175 green marbles, and 115 yellow marbles. Which is the best estimate of the total number of marbles in his collection?

a. | 700 | ||

b. | 600 | ||

c. | 500 | ||

d. | 400 |

Correct answer : (3)

8.

Ashley has 156 candies. She gave 79 to her brother. About how many candies does she have?

a. | 100 | ||

b. | 70 | ||

c. | 80 | ||

d. | 90 |

Correct answer : (3)

9.

John scored 423 points and his brother scored 326 points. About how many more points did John score?

a. | 150 | ||

b. | 80 | ||

c. | 100 | ||

d. | 90 |

Correct answer : (4)

10.

There are 477 quarts of water in a large water tank. Matt used 343 quarts of water. Estimate the quantity of water left in the tank. Round to the nearest ten.

a. | 820 quarts | ||

b. | 900 quarts | ||

c. | 140 quarts | ||

d. | 100 quarts |

Correct answer : (3)