<span>1.100% - 60% = 40% (%) 1 книга дороже 2
Ответ 40%</span>
1) <span>14/15 + 4 7/15 =5 6/15=5 2/5</span>
<span>2) <span>3 3/12 + 11/12 =4 2/12= 4 1/6</span></span>
<span><span>3) <span>3 3/12 + 1 11/12= 5 2/12=5 1/6</span></span></span>
<span><span><span>4)<span>1 2/15 + 4 7/15 = 5 9/15= 5 3/5</span></span></span></span>
<span><span><span><span>5)<span>1 14/15 + 4 7/15= 6 6/15= 6 2/5</span></span></span></span></span>
1. 3/4+5/8=(6+5)/8=11/8
2.2/5+7/15=(6+7)/15=13/15
3.7/16+1/4=(7+4)/16=11/16
4. 2/7+1/3=(6+7)/21=13/21