Решите примеры с помощю распределительного свойства умнажения.
1. (4 2/5-3 2/7)*5
2. 8 5/11*4 2/9+8 5/11 *6 7/9
3. (2-1 8/15)*30
4. (10 3/4 - 2 2/3)*8
5. 6 3/5 * 7 1/6 - 2 1/6 * 6 3/5
6. (2 1/15+4/3)*7
1. (4 2/5-3 2/7)*5
2. 8 5/11*4 2/9+8 5/11 *6 7/9
3. (2-1 8/15)*30
4. (10 3/4 - 2 2/3)*8
5. 6 3/5 * 7 1/6 - 2 1/6 * 6 3/5
6. (2 1/15+4/3)*7
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= 4 2/5 * 5 - 3 2/7 * 5 = 22/5*5 - 23/7*5 = 22 + 115/7=22+16 3/7=38 3/7-------------------------------------------------------
= 8 5/11(4 2/9 +6 7/9) = 8 5/11* 11= 93/11* 11= 93
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= 2*30 - 1 8/15*30 = 60 - 23/15*30 = 60 - 46 = 14
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= 10 3/4 * 8 - 2 2/3*8 = 43/4*8- 8/3*8 = 86 - 64/3=86-21 1/3= 64 2/3
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= 6 3/5(7 1/6 - 2 1/6) = 6 3/5 * 5 = 33/5 * 5 = 33
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= 2 1/15 * 7 + 4/3*7 = 31/15*7 + 28/3= 217/15 + 140/15=357/15= 23 12/15 =
= 23 4/5
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