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Goal: to practise how to make use of distributive property on special numbers, like (A + B) * (A - B) = A*A - B*B, A*C +B*C = (A + B ) *C, A*C - B*C = (A-B) * C

Friday July 30 2010
07:15:35 PM
Friday July 30 2010
07:15:35 PM
Flip Answers
1)   201 * 199 =          
2)   390 * 410 =          
3)   204 * 196 =          
4)   405 * 395 =          
5)   97 * 103 =          
6)   293 * 307 =          
7)   305 * 295 =          
8)   402 * 398 =          
9)   102 * 98 =          
10)   97 * 103 =          
11)   60 * 95 + 40 * 95 =          
12)   85 * 256 - 56 * 85 =          
13)   86 * 47 + 53 * 86 =          
14)   240 * 43 - 43 * 40 =          
15)   69 * 73 + 31 * 73 =          
16)   259 * 91 - 59 * 91 =          
17)   159 * 46 - 59 * 46 =          
18)   245 * 58 - 45 * 58 =          
19)   94 * 263 - 63 * 94 =          
20)   94 * 66 + 134 * 94 =          

Score: ______________   

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