Practice Number Sense in Math
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
An intuitive understanding of numbers, their relative size, and how they relate to each other and to real quantities.
Knowing that 100 is way more than 10, or that 7 is between 5 and 10.
Showing a random 20 of 64 problems.
Example 1
mediumWhich is more: 1 ten and 4 ones, or 4 tens and 1 one?
Example 2
challengeEstimate to the nearest whole number using perfect-square benchmarks.
Example 3
easyRound to the nearest ten.
Example 4
easyHow many hearts do you see? :: ::
Example 5
mediumA jar holds about 100 marbles. A second jar looks 3 times as full. About how many marbles in the second jar?
Example 6
easyWhat number is halfway between and ?
Example 7
easyWhat is one less than 9?
Example 8
mediumYou see 0 cookies on the plate. How many cookies?
Example 9
easyHow many tens are in 60?
Example 10
mediumOn a number line from 0 to 100, roughly where does 25 sit?
Example 11
mediumA school has 483 students. Each classroom holds about 30 students. Approximately how many classrooms are needed?
Example 12
easyWhich is larger, 19 or 91?
Example 13
mediumA jar has marbles. Round the number to the nearest ten.
Example 14
hardA bake sale has cupcakes in the morning and more in the afternoon. About how many cupcakes are there in total? Use rounding to the nearest ten.
Example 15
mediumWhat is ten less than ?
Example 16
mediumEstimate by first rounding each number to the nearest ten.
Example 17
mediumWithout computing exactly, is more or less than 500?
Example 18
easyRound to the nearest ten.
Example 19
hardStart at . Take ten less. Then take ten less again. What number do you land on?
Example 20
easyWhich number is just before 10 when counting up?