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a) (46+34)+(-80)=80+(-80)=0
b)2017\(^0\)=0
=> 5.(-9).2.(-7).(2017\(^0\))=0
c)115+85+35-46-35
=(35-35)+(115+85-46)
=154
d) 57.33-57.73
=57.(33-73)
=57.(-40)=-2280
\(27.332+93.43+57.61+69.57\\ =27.332+93.43+57.\left(61+69\right)\\ =27.332+93.43+57.130\\ =8964+3999+7410=20373\\ 34.75+75.66-65.100\\ =\left(34+66\right).75-65.100\\ =100.75-65.100\\ =100.\left(75-65\right)\\ =100.10=1000\\ \left(456.11+912\right).37:13:74\\ =5928:13:\left(74:37\right)\\ =456:2=228\\ 6^2:4.3+2.5^2\\ =36:4.3+2.25\\ =9.3+50=27+50=77\\ 5.4^2-18:3^2\\ =5.16-18:9\\ =80-2=78\\\left[\left(315+372\right).3+\left(372+315\right).7\right]:\left(26.13+74.14\right)\\ =687.\left(3+7\right):\left(338+1036\right)\\ 687.10:1374\\ =6870:1374=5\\ 12:\left\{390:\left[500-\left(125+35.7\right)\right]\right\}\\ =12:\left[390:\left(500-370\right)\right]\\ =12:\left(390:130\right)=12:3=4\\ 192000-\left(1500.2+1800.3+1800.2:3\right)\\ =192000-\left(3000+5400+1200\right)\\ =192000-9600=182400\)
a) − 1 10 + 3 5 + − 1 2 = − 1 10 + 6 10 + − 5 10 = 0
b)
3 8 + − 3 4 + 7 12 : 5 6 + 1 2 = 9 24 + − 18 24 + 14 24 : 5 6 + 1 2 = 5 24 ⋅ 6 5 + 1 2 = 1 4 + 1 2 = 3 4
a) 3 4 : 2 3 : 3 5 = 3 4 . 3 2 . 5 3 = 15 8
b) 3 4 : 2 3 : 3 5 = 3 4 : 2 3 . 5 3 = 3 4 : 10 9 = 3 4 . 9 10 = 27 40
a: =(21-11)+(22-12)+(23-13)+(24-14)
=10+10+10+10
=40
b: =(34-14)+(35-15)+(36-16)+(37-17)
=20+20+20+20
=80
a. -34 + 16 + 34 + 7
= [ ( -34 ) + 34 ] + ( 16 + 7 )
= 0 + 23
= 23
b. 17 + ( -35 ) + ( - 37 ) + 35
= [ ( -35 ) + 35 ] + [ ( -37) + 17 ]
= 0 + ( -20 )
= ( -20 )
c. 3157 + 57 - 3159 - 66
( 3157 - 3159 ) + ( 57 - 66 )
= (-2) + ( -9 )
= (-11)
d. 8715 + (-1250) + 56 - 250
7465 + 56 - 250
= 7521 - 250
= 7271
a) \(-34+16+34+7\)
\(=\left(-34+34\right)+\left(16+7\right)\)
= \(0+23=23\)
b) \(17+\left(-35\right)+\left(-37\right)+35\)
\(=\left(-37+17\right)+(-35+35)\)
\(=-20+0=-20\)