1)40+65=105(км/час)-скорость танков Т-34 и Тетрарх вместе.
<span>13/24-7/16=5/48 </span><span>3/10+5/12=43/60 1 4/15+3 7/25=4 41/75
</span>9 11/12-5 3/8=4 13/24
Ответ:
1) 12 = 10+2
2) 12+7 = (10+2)+7 = 10+(2+7) = 10+9 = 19
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6+5 = (5+1)+5 = (5+5)+1 = 10+1 = 11
3) 13+6 = (10+3)+6 = 10+(3+6) = 10+9 = 19
15+3 = (10+5)+3 = 10+(5+3) = 10+8 = 18