1Ass

INVESTISSEMENT: Exercice 1 $$\begin{array}{rl}& A=36+24-52+3\\ & A=60-52+3\\ & A=8+3\\ & A=11\\ & B=3,5-2,5+14,3-5\\ & B=1+14,3-5\\ & B=15,3-5\\ & B=10,3\\ & C=4,8+6-7,6-1,2\\ & C=10,8-7,6-1,2\\ & C=3,2-1,2\\ & C=2\end{array}$$ Exercice 2 $$\begin{array}{rl}& A=36-(6+10)-12\\ & A=36-16-12\\ & A=20-12\\ & A=8\\ & B=(43-6)-(5+23)\\ & B=37-28\\ & B=9\\ & C=12+(12-8)+6\\ & C=19+4+6\\ & C=29\end{array}$$ Exercice 3 $$\begin{array}{rl}& A=15:5-4+12\\ & A=3-4+12\\ & A=-1+12\\ & A=11\\ & B=19+12\times 3-24\\ & B=19+36-24\\ & B=55-24\\ & B=31\\ & C=38-5\times 1,4-1\\ & C=38-7-1\\ & C=30\end{array}$$ Exerlice 4 $$\begin{array}{rl}& A=2,1\times (12-(4+3))\\ & A=2,1\times (12-7)\\ & A=2,1\times (5\\ & A=7,1\\ & B=[28-(6+4))\cdot 6\\ & B=[28-10]:6\\ & B=18:6\\ & B=3\\ & C=56,3-3\times 2,5+7\times 4\\ & C=56,3-7,5+28\\ & C=20,8\end{array}$$ Exercice 5 $$\begin{array}{rl}& A=38-7\times 5\cdot 18:9\\ & A=38-35-2\\ & A=3-2\\ & A=1\\ & B=74-(9-7)+(8-3,5\times 2)\\ & B=74-2+(8-7)\\ & B=74-2+1\\ & B=73+1=74\\ & C=[4\times 8-(15-8)]\times 3+[(7\times 2)+2]-10\\ & C=[32-7]\times 3+[14+2]-10\\ & C=\{\\ & C=25=75+6\\ & C=81\end{array}$$ ExerciG 6 $$\begin{array}{rl}& A=[1-(0,25\times 4)]\times 4\\ & A=[1-1]\times 4\\ & A=0\times 4\\ & A\le 0\\ & B=1+[3\times (6+(3\times 8))]\\ & B=1+[3\times (6+24)]\\ & B=1+[3\times 30)\\ & B=1+90\\ & B=91\\ & C=[(1+3)\times 6)]-3(3\times 8)\\ & c=[4\times 6]-3\times 24\\ & c=24-3\times 24\\ & c=24\times (1-3)\\ & c=24x-2\\ & c=-48\\ & D=(5+3,2)-(1+6,3)\\ & D=8,2-7,3\\ & D=0,1\\ & \end{array}$$ Exorcice 7 $$\begin{array}{rl}3+4\times 2& =14\\ (3+4)\times 2& =7\times 2\\ & =14\end{array}$$ $$\begin{array}{rl}11+3\times 7& =32\\ 11+(3\times 7)& =11+21\\ & =32\end{array}$$ $$2\times 7-2+2=12$$ $$\begin{array}{rl}2\times (7-2)+2& =2\times 5+2\\ & =10+2\\ & =12\end{array}$$ $$\begin{array}{rl}1,2\times 5+2& =8\\ (1,2\times 5)+2& =6+2\\ & =8\end{array}$$ $$\begin{array}{rl}& \text{ Exercice }9\\ & \text{ Aire }=(16\times 6)-(6-4)\times (16-10)\\ & \text{ Aire }=96-2\times 6\\ & \text{ Aire }=96-12\\ & \text{ Aire }=84\\ & \text{ Périmetre }=6+10+(6-4)+(16-10)+4+16\\ & \text{ Perivetre }=16+2+6+20\\ & \text{ Perimetre }=44\end{array}$$ Exercice 8 $$e=50-3\times 9,2-13,8$$ $$\begin{array}{rl}& \text{ Exercice }9\\ & \text{ Aire }=(16\times 6)-(6-4)\times (16-10)\\ & \text{ Aire }=96-2\times 6\\ & \text{ Aire }=96-12\\ & \text{ Aire }=84\\ & \text{ Périmetre }=6+10+(6-4)+(16-10)+4+16\\ & \text{ Perivetre }=16+2+6+20\\ & \text{ Perimetre }=44\end{array}$$ Exercice 10 $$\begin{array}{rl}& \text{ a) }4\times x-8=4x-8\\ & a\times (b+4)=a(b+4)\\ & 5,4\times a=5,4a\\ & a\times 3=3a\\ & (4-x)\times (3+y)=(4-x)(3+y)\\ & 2\times \pi \times R=2\pi R\end{array}$$ 2) par ce que le signe de multiplication est entre deur nombre. $$\begin{array}{rl}y& =6\times 3a\\ & =18a\end{array}$$