A CROSS-NUMBER PUZZLE FOR INTERMEDIATE GRADESAuthor(s): Margaret F. WillerdingSource: The Arithmetic Teacher, Vol. 4, No. 5 (NOVEMBER 1957), p. 223Published by: National Council of Teachers of MathematicsStable URL: http://www.jstor.org/stable/41183959 .

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November, 1957 223

SCRAPBOOKS - Pictures, news items that illustrate use of num-

ber

Language Activities - Books related to mathematics - example, "The

Wonderful World of Mathematics" - Dramatizations of the social applications of

mathematics - Panels and debates on current issues and prob-

lems.

Editor's Note. The Milwaukee Public Schools are to be commended for giving recognition in a professional and tangible way to the importance of in-service education in the teaching of arithmetic. The school administration and personnel also place emphasis on group guidance regarding ways of enriching the study of arithmetic for the gifted child by providing suggestions that teachers may follow. Other school systems may wish to make com- parisons with practices in their own system and those of Milwaukee; or tell us wherein practices in their own system are better and why.

A CROSS-NUMBER PUZZLE FOR INTERMEDIATE GRADES Margaret F. Willerding

San Diego State College

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ACROSS 21. From 10,272 subtract the year Columbus dis- 1 100 - 15 covered America 3. 3,2404-36 DOWN 4. 7+8+9+6+5+3 t 9X9 5. 2,650 4-25 2. 884-379 7. 11,820 4-60 4. 2,765ч-7 8- 8X7 6. 3,356+3,288 9- 315 4-9 7. 2,408-1,059

11. 52X92 10. 634-9 12. 12-4 13. 780-711 13. 8X8 15. 6164-7 14. 14X7 16. 6+7+8+9+10 16. 7X7 17. 2X4+9 17. 121 4-11 18. Reverse the digits in the product of 9X9 19. § of 164 20. 100-80

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