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Lesson 18<br /> “CANCELLATION OF INSIGNIFICANT ZEROS “EASY WAYS IN DIVIDING WHOLE NUMBERS<br />Objectives <br />After this lesson, the students are expected to:<br />divide whole numbers using other method;<br />perform division of  whole numbers mentally;<br />define “ cancellation of insignificant zeros.”<br />The cancellation of Insignificant Zeros is one of the easy ways in performing division of whole numbers. It is done by cancelling the insignificant zeros in both the divisor and the dividend.<br />476250153<br />EXAMPLES:<br />                                          101<br />     50   5050               505÷5=101           ( both dividend and divisor)<br />       -50<br />                                                      050<br />         50<br />          0<br />                                              <br />                                                      210<br />                                  2.            5 1050          105÷5=21(10) =210 (the insignificant zero in                 <br />                                                  -10                                                        dividend was cancelled)<br />3928745285115                      50<br />                                                       -50  <br />Remember that in cancelling both the dividend and divisor, the insignificant zeros are needed to be the same. If you cancelled 3 zeros in the dividend, you need also to cancel 3 zeros from the divisor.                                                          0<br /> <br />EXAMPLES: <br />To check multiply the quotient to the divisor then multiply also the place value of the removed zeros<br />300÷100=3 or  300÷100=3         <br />30 000÷1 000=30<br />2500÷100=25<br />-638175-638175WORKSHEET NO. 18<br />NAME: ___________________________________DATE: _____________ <br />YEAR & SECTION: ________________________RATING: ___________<br />,[object Object],1. 640÷80=___________________<br />2. 140÷20=___________________<br />-43719753009913. 36000÷600=________________<br />4. 700÷350=__________________<br />5. 3500÷70=__________________<br />6. 350÷ 100=__________________<br />7. 5600÷ 800=_________________<br />8. 600÷ 30=___________________<br />42017952444759. 100÷50=____________________<br />10. 800÷40=___________________<br />-704850-527078WRITE YOUR SOLUTION HERE:11. 1000÷ 100=_________________<br />12. 140÷ 70=___________________<br />13. 420 20=____________________<br />14. 14000÷ 70=_________________<br />15. 36000÷180=_________________<br />16. 4800÷ 240=_________________<br />17. 99000÷ 330=________________<br />18. 860÷ 20=___________________<br />-441007530448319. 770÷ 770=__________________<br />20. 630÷ 30=___________________<br />B. CHALLENGE!!!<br />,[object Object]
Copy the figure again. Show how to divide it in 3 equal parts.
Copy the figure again. Show how to divide it in 4 equal parts.    <br />2741779290821 Draw a 2 dimensional clock. Then draw a line across the clock so that the sum of the numbers in each group is the same.<br />
028 lesson 18
028 lesson 18

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028 lesson 18

  • 1.
  • 2. Copy the figure again. Show how to divide it in 3 equal parts.
  • 3. Copy the figure again. Show how to divide it in 4 equal parts. <br />2741779290821 Draw a 2 dimensional clock. Then draw a line across the clock so that the sum of the numbers in each group is the same.<br />