\(a.=1992-53+158-247-1592\)
\(=\left(1992-1592\right)-\left(53+247\right)+158\)
\(=400-300+158\)
\(=100+158\)
\(=258\)
\(b.=-85-\left(-10\right)-\left(-85\right)+\left(-50\right)\)
\(=-85-\left(-85\right)-\left(-10--50\right)\)
\(=0-40\)
\(=-40\)
\(a.1992+\left(-53\right)+158+\left(-247\right)+\left(-1592\right)\)
\(=1992-53+158-247-1592\)
\(=\left(1992-1592\right)-\left(53+247\right)+158\)
\(=400-300+158\)
\(=258\)
\(c.=71+30-18-30\)
\(=71-18+\left(30-30\right)\)
\(=53+0\)
\(=53\)
\(d.=30-37+37-85\)
\(=\left(30-85\right)-\left(37-37\right)\)
\(=-55-0\)
\(=-55\)
b, c giống ❋ℳøøn
\(d.-\left(-30\right)-\left(+37\right)+37+\left(-85\right)\)
\(=30-37+37-85\)
\(=-55\)
Chúc bn hk tốt ^^
