1. Lesson 7<br />WHAT IS SUBTRACTION?<br />Objectives<br />After this lesson, the students are expected to:<br />define what is subtraction;<br />identify the parts in subtraction;<br />differentiate the subtraction from addition.<br />What is Subtraction?<br />-224394185272<br />After learning and describing addition as a process of combining two or more groups of objects, we can now consider its opposite operation --- Subtraction. If addition is combining of group of object, subtraction is the process of taking away or of removing something. The symbol used for subtraction is the minus sign (-).<br />When we write 12 – 6, we wish to subtract 6 from 12 or to take away 6 from 12. To find the difference between two numbers, we have to look for a number which when added to the subtrahend, will give the minuend. The table shows the relation between addition and subtraction. One undoes the work of the other.<br />346710091440<br /> 12 addend + 6 addend 18 sum Minuend 18 Subtrahend - 6 Difference 12Let us consider the notation below.<br />Difficulties may arise in subtraction when a digit of the subtrahend is larger than the corresponding digit in the minuend. The process of doing a subtraction of this type is called barrowing or regrouping<br />-428625-390526WORKSHEET NO. 7<br />NAME: ___________________________________DATE: _____________ <br />YEAR & SECTION: ________________________RATING: ___________<br />-29210121920<br />A. Give the meaning of the following words.<br />-41444824792811. Subtraction-________________________________________________<br />2. Minuend-__________________________________________________<br />3. Subtrahend-________________________________________________<br />4. Difference-_________________________________________________<br />B. Name the following parts of the mathematical expression given below.<br /> 12638 _____- 3630 ________ 9008 <br />433387529845<br />-428721-542219C.Find the difference<br />1. 349 -265 2. 1243 -360 3. 5428 -2001 4. 10,000 -6,543<br />D. Solve the following to get the difference<br />WRITE YOUR SOLUTION HERE:1. 5637584-43675=________________<br />-41357553086102. 5389-782=_____________________<br />3. 43674-768=____________________<br />4. 376598-5281=__________________<br />5. 67396-683=____________________<br />6. 57290-7849=___________________<br />7. 56284-6847=___________________<br />8. 683963-68363=_________________<br />9. 6254-978=_____________________<br />10. 654-87=______________________<br />
