how to calculate math faster(4)?

How about counting 31², 32² ,33², 34², 35²……..,65², 66², 67², 68²,69² in a faster way? NO CALCULATORS!

BUT BEFORE I SHOW YOU HOW, YOU NEED TO BE ABLE TO MEMORIZE ALL SQUARE NUMBERS FROM 1 TO 20!

FROM 1 TO 10, I ASSUME THAT YOU ALREADY KNOW

11²=121 12²=144 13²=169 14²= 196 15²=225 16²=256 17²=289 18²=324 19²=361 20²=400

LET’S START!

51² = …?

51 IS 1 MORE THAN 50 AND ½ OF 50 IS 25.

25 + 1 = 26 . .

AND 1² = 1,WRITE IN 2 DIGITS FORM = 01, SO THE ANSWER IS 2601 .

54² = …?

54 IS 4 MORE THAN 50, SO 25 + 4 = 29 AND 4² = 16, SO THE ANSWER IS 2916.

48² = …?

48 IS 2 LESS THAN 50, SO 25 – 2 = 23 AND 2² = 04, SO THE ANSWER IS 2304

62² = …?

62 IS 12 MORE THAN 50, SO 25 + 12 = 37 AND 12² = 144, ADD 37 WITH 1 = 38 THEN WRITE 44 = 3844

EASY RIGHT?

REMEMBER TO PRACTISE WITH OTHER NUMBERS!

IF YOU HAVE TROUBLE in math, PLEASE SEND IT TO hi-mamo@hotmail.com

I’ll help you!

ALL THE BEST FOR YOU!!!