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Goal: to practice 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

Wednesday May 20 2026
11:33:41 AM
Wednesday May 20 2026
11:33:41 AM
Flip Answers
1)   390 * 410 =          
2)   90 * 110 =          
3)   199 * 201 =          
4)   93 * 107 =          
5)   401 * 399 =          
6)   201 * 199 =          
7)   195 * 205 =          
8)   95 * 105 =          
9)   195 * 205 =          
10)   92 * 108 =          
11)   45 * 97 + 155 * 97 =          
12)   72 * 140 - 40 * 72 =          
13)   243 * 86 - 86 * 43 =          
14)   30 * 147 - 30 * 47 =          
15)   56 * 61 + 61 * 144 =          
16)   43 * 235 - 35 * 43 =          
17)   56 * 44 + 144 * 44 =          
18)   27 * 75 + 73 * 75 =          
19)   136 * 49 + 64 * 49 =          
20)   21 * 36 + 21 * 64 =          

Score: ______________   

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