Answers

2016-07-10T20:29:40+08:00
3. the original number is 5
4. b. 131 x 132

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write 1 before the digit 5, then it becomes 15 which is 3 times larger/bigger than the original number (5)
for number 4, 131 x 132 = 17 292
67*70
i'm sorry I can't find the answer for the first question in number 4 :(
i just got the answer for #4-a. It's 75 x 76 = 5700