Subtract a multiple of 10

Learning Objectives Identify multiples of 10 up to 100. Subtract a multiple of 10 from a two-digit number without regrouping. Subtract a multiple of 10 from a three-digit number without regrouping. Use a number line to model subtracting multiples of 10. Use place value concepts to explain how to subtract a multiple of 10. Solve one-step word problems that involve subtracting a multiple of 10. You have 65 shiny pennies and you spend 30 of them on a cool sticker. How many pennies do you have left? 🪙 In this lesson, you will learn a super-fast trick for subtracting numbers like 10, 20, 30, and more! This mental math skill will help you solve problems quickly and make you a subtraction superstar. It's a key building block for working with bigger numbers. Real-World Appli...

TermDefinitionExample Multiple of 10A number you get when you count by tens. These numbers always end in a zero.10, 20, 30, 40, 50, 60, 70, 80, 90, 100 are all multiples of 10. SubtractionThe process of taking an amount away from another amount to find what is left. It is the opposite of addition.If you have 5 apples and eat 2, you have 3 left. The problem is 5 - 2 = 3. DifferenceThe answer you get when you subtract one number from another.In the problem 80 - 20 = 60, the difference is 60. Place ValueThe value of a digit based on its position in a number. We focus on the ones, tens, and hundreds places.In the number 145, the 1 is in the hundreds place (value 100), the 4 is in the tens place (value 40), and the 5 is in the ones place (value 5). Tens DigitThe digit in the tens position of a...

The Tens Place Rule (A tens + B ones) - (C tens) = (A - C) tens + B ones When you subtract a multiple of 10, you only need to subtract the tens digits. The ones digit in your starting number stays exactly the same because you are subtracting zero ones. Number Line Jumps Rule X - (N * 10) = X - 10 - 10 ... (N times) To subtract a multiple of 10 on a number line, start at the bigger number and make backward jumps of 10. The number of jumps you make is the same as the tens digit of the number you are subtracting.