Rounding
What is 23 rounded to the nearest ten?
20
What is the word form of the number 56?
Estimate the sum of 21 + 38 by rounding to the nearest ten.
20 + 40 = 60
A baker made 45 cupcakes. They sold 20 cupcakes in the morning and 10 more in the afternoon. How many cupcakes were left?
15 cupcakes (45 - 20 = 25; 25 - 10 = 15)
What is 175 + 248?
423
What is 78 rounded to the nearest ten?
80
What is the expanded form of 123?
100 + 20 + 3
Estimate the difference between 92 and 47 by rounding to the nearest ten.
90 - 50 = 40
Leo had 30 marbles. He won 15 more marbles in one game and 5 more in another. How many marbles does he have now?
50 marbles (30 + 15 = 45; 45 + 5 = 50)
What is 589 + 137?
726
What is 145 rounded to the nearest hundred?
100
What is the standard form of four hundred seventy-eight?
478
Maria has 76 stickers and gives 22 of them to her friend. About how many stickers does she have left?
about 60 stickers (80-20)
There are 75 books in the library. If 20 books are checked out and 15 new books are added, how many books are there now?
70 books (75 - 20 = 55; 55 + 15 = 70)
What is 452 - 189?
263
What is 492 rounded to the nearest hundred?
500
What is the standard form of 200 + 90 + 5?
295
Sam collects 115 seashells and then finds 38 more. About how many seashells does he have in all?
about 160 seashells (120+40)
A farmer has 120 apples. She sells 50 apples to a store and gives 25 apples to her family. How many apples does she have left?
5 apples (120 - 50 = 70; 70 - 25 = 45)
What is 700 - 325?
375
What is 850 rounded to the nearest hundred?
900
What is the word form of 602?
six hundred two
A bus travels 290 miles on Monday and 410 miles on Tuesday. About how many more miles did it travel on Tuesday?
About 100 miles (400-300)
A store has 150 balloons. On Monday, they sell 40 balloons. On Tuesday, they sell 35 balloons. How many balloons are still left to sell?
75 balloons (40 + 35 = 75; 150 - 75 = 75)
What is 901 - 587?