a) 45 (13+78) + 9 (87+22) . 5 b) 16 (27+75) +8 (53 +25) . 2
c) (64+115+36) - 25 . 8 d) 15 . 8 - (17-30+83) - 114 : 6
e) 19 + 19 . 99 - 25 . 8 f) 250 : 50 - ( 46 - 75 + 54 ) : 4 \
g) 13 (17-95+83) : 5 - 18 : 9 h) 140 - 180 (47-90+43) + 7
i) 24 ( 15+30+85-120) : 10 j) 27 + 73 - 30 : (25-10)
k) 18 - 4 (27-90+73) : 10 l) 15 - 25 . 8 : ( 100.2)
`a) 45. (13+78) + 9. (87+22) . 5 `
`= 45 .(13+78) + 45. (87+22)`
`= 45 . (13 + 78 + 87 + 22)`
`= 45 . 200`
`= 9000`
`b) 16. (27+75) +8. (53 +25) . 2`
`= 16 .(27+75) +16. (53 +25) `
`= 16 . (27 + 75 + 53 + 25)`
`= 16 . 180`
`= 2880`
`c) (64+115+36) - 25 . 8 `
`= (100+115) - 200 `
`= 215 - 200`
`= 15`
`d) 15 . 8 - (17-30+83) - 114 : 6`
`= 120 -70- 19`
`= 31`
a: \(45\left(13+78\right)+9\cdot\left(87+22\right)\cdot5\)
\(=45\cdot\left(13+78\right)+45\cdot\left(87+22\right)\)
\(=45\left(13+78+87+22\right)=45\cdot200=9000\)
b: \(16\left(27+75\right)+8\cdot\left(53+25\right)\cdot2\)
\(=16\cdot\left(27+75\right)+16\cdot\left(53+25\right)\)
\(=16\left(27+75+53+25\right)\)
\(=16\cdot\left(100+80\right)=16\cdot180=2880\)
c: \(\left(64+115+36\right)-25\cdot8\)
\(=100+115-200\)
=115-100=15
d: \(15\cdot8-\left(17-30+83\right)-114:6\)
\(=120-\left(100-30\right)-19\)
\(=101-70=31\)
e: \(19+19\cdot99-25\cdot8\)
\(=19\left(1+99\right)-200\)
=1900-200=1700
f: \(250:50-\left(46-75+54\right):4\)
\(=5-\left(100-75\right):4\)
\(=5-\dfrac{25}{4}=-\dfrac{5}{4}\)
g: \(13\left(17-95+83\right):5-18:9\)
\(=13\cdot\left(100-95\right):5-2\)
=13-2
=11
h: \(140-180\left(47-90+43\right)+7\)
\(=147-180\left(90-90\right)\)
=147-0=147
i: \(24\left(15+30+85-120\right):10\)
\(=24\cdot\left(100+30-120\right):10\)
\(=24\cdot10:10=24\)
j: \(27+73-30:\left(25-10\right)\)
\(=100-30:15\)
=100-2=98
k: \(18-4\left(27-90+73\right):10\)
\(=18-4\left(100-90\right):10\)
=18-4=14
l: \(15-25\cdot8:\left(100\cdot2\right)\)
\(=15-200:200\)
=15-1=14
