Multiply numbers ending in zeroes: word problems

Learning Objectives Identify the key numbers and question in a multiplication word problem. Use the 'zero trick' to multiply a single-digit number by a multiple of 10 (e.g., 4 x 30). Explain the pattern of adding a zero to the product of the basic fact. Solve one-step word problems that require multiplying numbers ending in zeroes. Write a correct number sentence to represent a word problem. Label their final answer with the correct units (e.g., 'pencils', 'cookies'). If one box holds 20 shiny pencils, how many pencils would you have in 5 boxes? Let's learn a super-fast trick to find out! ✏️ In this lesson, we will learn a special shortcut for multiplying numbers that end in zero. This trick will help us solve story problems quickly and se...

TermDefinitionExample Multiple of 10A number you get when you multiply any whole number by 10. These numbers always end in a zero.10, 20, 30, 40, 50, 60... ProductThe answer you get when you multiply two or more numbers together.In 3 x 20 = 60, the number 60 is the product. FactorsThe numbers that are being multiplied together to get a product.In 3 x 20 = 60, the numbers 3 and 20 are the factors. Basic FactA simple multiplication problem using single-digit numbers that you know from your times tables.The basic fact in 7 x 40 is 7 x 4 = 28. Number SentenceA math sentence written with numbers and symbols to show a calculation.The story '4 groups of 30' can be written as the number sentence 4 x 30 = 120.

The Zero Trick for Multiplication a \times (b \times 10) = (a \times b) \times 10 To multiply a number by a multiple of 10 (like 20, 30, or 40), first, multiply the front digits (the basic fact). Then, take the zero from the multiple of 10 and place it at the end of your answer. Finding Multiplication in Word Problems Look for keywords: 'each', 'in all', 'total', 'groups of', 'every' When a word problem asks for the total number of items in several equal-sized groups, it is usually a signal to multiply.