Thực hiện phép tính sau:
a) 12.32+5.43 - 42.22
b) 57:53+35.3
c)53.3+ [ 85 - ( 11 -6 )2 ]
d) 165 . 15 + 165 . 35 + 165 . 50
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a.
\(4\times183\times25=4\times25\times183=100\times183=18300\)
b.
\(165\times59+165\times165\times40=165\times\left(59+1+40\right)=165\times100=16500\)
c.
\(56\times49:7=56\times\left(49:7\right)=56\times7=392\)
d.
\(67\times15-57\times15=15\times\left(67-57\right)=15\times10=150\)
a) \(-\left(76-35+15\right)+\left[18-27+\left(-17\right)\right]\)
\(=-76+35+15+18-27-17\)
\(=-52\)
b) \(167+\left[127-235-\left(-16\right)\right]+\left(-67\right)\)
\(=167+127-235+16-67\)
\(=8\)
c) \(\left(-19\right)+165-\left[27+\left(-21\right)-\left(+72\right)\right]\)
\(=\left(-19\right)+165-27+21+72\)
\(=212\)
d) \(89.\left(-2\right)+\left[20+\left(-2\right).\left(-5\right)-85\right]\)
\(=\left(-178\right)+\left(20+10-85\right)\)
\(=\left(-178\right)+20+10-85\)
\(=-233\)
a: =150x70=10500
b: =999(15+85)=99900
c: =72072:72=1001
a.31500:3=10500
b.(165:11+85)x999
=(15+85)x999
=100x999
=99900
c.(72072:6):12
=12012:12
=1001
d.18180:36=505
=190:{ [ 950:[225-( 165-130)]}-20170+23.23
=190:{ [ 950:[225-35]}-20170+23.23
=190:{ 950:190}-20170+23.23
=190:5-20170+23.23
=190:5-1+23+3
=190:5-1+26
=190:5-1+64
=38-1+64
=39+64
=103
a) \(5^2.13^2+4.75-25.165\)
\(=25.169+300-4125\)
\(=4225+300-4125\)
\(=\left(4225-4125\right)+300\)
\(=100+300\)
\(=400\)
Ta có : 52 . 132 + 4 . 75 - 25 . 165
= ( 5 . 13 ) . ( 5 . 13 ) + 4 . 3 . 25 - 25 . 165
= 65 . 65 + 12 . 25 - 25 . 165
= 652 - 25 . 165 + 12 .25
= 4225 - 3825 = 400
1. Q=165+247+528+125+315
= 100+60+5+200+40+7+500+20+8+100+20+5+300+10+5
= ( 100+200+500+100+300) + ( 60+40+20+20+10 ) +( 5+7+8+5+5 )
= 1200+150+30
=1280
R=1234+5678+8+80
=1000+200+30+4+5000+600+70+8+8+80
= ( 1000+5000) + ( 200+600 ) + (30+70+80) + ( 4+8+8)
=6000+800+180+20
=7000