a) (-4).(-3).25.(-8) b) 7.(– 25).(– 3)2.(– 4) d) [ 93–( 20–7 )]:16 e) 53 – (–51) + (-53) + 49 f) 168 – (49) + (-68) + 4g) 53 – (–7) + (-53) – 49 h) 25.(- 124) + 124. 25 i) (-11).36 - 64.11 k) 125.(- 24) + 24.125 l) 125.(-23) + 23.225 m) (-11).36 + 64.(-...
Đọc tiếp
a) (-4).(-3).25.(-8) b) 7.(– 25).(– 3)2.(– 4)
d) [ 93–( 20–7 )]:16 e) 53 – (–51) + (-53) + 49 f) 168 – (49) + (-68) + 4
g) 53 – (–7) + (-53) – 49 h) 25.(- 124) + 124. 25 i) (-11).36 - 64.11 k) 125.(- 24) + 24.125 l) 125.(-23) + 23.225 m) (-11).36 + 64.(- 11)
\(a,\left(-4\right).\left(-3\right).25.\left(-8\right)\)
\(=12.25.\left(-8\right)\)
\(=12.\left(-200\right)\)
\(=-2400\)
\(b,7.\left(-25\right).\left(-3\right)^2.\left(-4\right)\)
\(=7.\left(-3\right)^2.100\)
\(=7.9.100=63.100\)
\(=6300\)
\(d,\left[93-\left(20-7\right)\right]:16\)
\(=\left[93-13\right]:16\)
\(=80:16=5\)
\(e,51-\left(-51\right)+\left(-53\right)+49\)
\(=51.2-53+49=102-53+49\)
\(=49.2=98\)
\(f,168-49+\left(-68\right)+4\)
\(=168-68-49+4=100-45=55\)
\(g,53-\left(-7\right)+\left(-53\right)-49\)
\(=53+7-53-49\)
\(=7-49=-42\)
\(h,25.\left(-124\right)+124.25\)
\(=25.\left(-124+124\right)\)
\(=25.0=0\)
\(i,\left(-11\right).36-64.11\)
\(=11.\left(-36\right)+\left(-64\right).11\)
\(=11.\left(-36-64\right)=11.\left(-100\right)\)
\(=-1100\)
\(k,125.\left(-24\right)+24.125\)
\(=125.\left(-24+24\right)=125.0=0\)
\(l,125.\left(-23\right)+23.\left(225\right)\)
\(=-125.23+23.225\)
\(=23.\left(-125+225\right)=23.100=2300\)
\(m,-11.36+64.\left(-11\right)\)
\(=-11.\left(36+64\right)=-11.100=-1100\)