a: \(\left(416+2459\right)-\left(2416+13-541\right)\)
\(=416+2459-2416-13+541\)
\(=\left(2459+541\right)+\left(416-2416\right)-13\)
\(=3000-2000-13=1000-13=987\)
b: \(\left(216-764\right)-\left(216-784+236\right)\)
\(=216-764-216+784-236\)
\(=\left(216-216\right)+\left(-764-236\right)+784\)
=-1000+784
=-216
c: \(\left(415+2617-64\right)+\left(-415-1617\right)\)
\(=415+2617-64-415-1617\)
\(=\left(415-415\right)+\left(2617-1617\right)-64\)
=0+1000-64
=1000-64
=936
d: \(\left(21-695+171\right)+\left(-4171-105\right)\)
\(=21-695+171-4171-105\)
\(=\left(171-4171\right)+\left(-695-105\right)+21\)
\(=-4000-800+21=-4800+21=-4779\)
e: \(\left(241-7652\right)-\left(-759+348-2023\right)\)
\(=241-7652+759-348+2023\)
\(=\left(241+759\right)-\left(7652+348\right)+2023\)
\(=1000-8000+2023=-7000+2023=-4977\)
g: \(\left(19-1276\right)-\left(-276+819-2024\right)\)
\(=19-1276+276-819+2024\)
\(=\left(19-819\right)-\left(1276-276\right)+2024\)
\(=-800-1000+2024=2024-1800=224\)
h: \(\left(25-465\right)-\left(-175-2465+126\right)\)
\(=25-465+175+2465-126\)
\(=\left(25+175\right)+\left(2465-465\right)-126\)
=2000+200-126
=2000+74
=2074
giúp tui với 3:30 tui hc r cảm ơn nha