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22 . 74 .52 . 26 .4 - 7000
= 4 x 74 x 25 x 26 x 4 - 7000
= 769600 - 7000
= 762600
\(2^2.74.5^2+5^2.26.4-7000\)
\(=4.74.25+25.26.4-7000\)
\(=7400+2600-7000\)
\(=10000-7000\)
\(=3000\)
22 . 74 . 52 + 52 . 26 . 4 - 7000
= 4 . 25 . 74 + 25 . 4 . 26 - 7000
= 100 . 74 + 100 . 26 - 7000
= 100 . ( 74 + 26 ) - 7000
= 100 . 100 - 7000
= 10000 - 7000
= 3000
22 x 74 x 52 x 52 .4 - 7000
= 4 x 74 x 25 x 25 x 4 - 7000
= 740000 - 7000
= 733000
a) \(3.5^2+15.2^2-26\div2\)
= 3.25 + 15.4 - 13
= 75 + 60 - 13
= 135 - 13
= 122
b) \(5^3.2-100\div4+2^3.5\)
= 125.2 - 25 + 8.5
= 250 - 25 + 40
= 225 + 40
= 265
c)\(6^2\div9+50.2-3^3.33\)
= 36 : 9 + 100 - 9.33
= 4 + 100 - 297
= 104 - 297
= -193
d)\(3^2.5+2^3.10-81\div3\)
= 9.5 + 8.10 - 27
= 45 + 80 - 27
= 125 - 27
= 98
e) \(5^{13}\div5^{10}-25.2^2\)
= 53 - 25.4
= 125 - 100
= 25
f) \(20\div2^2+5^9\div5^8\)
= 20 : 4 + 5
= 5 + 5
= 10
\(27.332+93.43+57.61+69.57\\ =27.332+93.43+57.\left(61+69\right)\\ =27.332+93.43+57.130\\ =8964+3999+7410=20373\\ 34.75+75.66-65.100\\ =\left(34+66\right).75-65.100\\ =100.75-65.100\\ =100.\left(75-65\right)\\ =100.10=1000\\ \left(456.11+912\right).37:13:74\\ =5928:13:\left(74:37\right)\\ =456:2=228\\ 6^2:4.3+2.5^2\\ =36:4.3+2.25\\ =9.3+50=27+50=77\\ 5.4^2-18:3^2\\ =5.16-18:9\\ =80-2=78\\\left[\left(315+372\right).3+\left(372+315\right).7\right]:\left(26.13+74.14\right)\\ =687.\left(3+7\right):\left(338+1036\right)\\ 687.10:1374\\ =6870:1374=5\\ 12:\left\{390:\left[500-\left(125+35.7\right)\right]\right\}\\ =12:\left[390:\left(500-370\right)\right]\\ =12:\left(390:130\right)=12:3=4\\ 192000-\left(1500.2+1800.3+1800.2:3\right)\\ =192000-\left(3000+5400+1200\right)\\ =192000-9600=182400\)
22 . 74 . 52 + 52 . 26 . 4 - 7000
= 4 . 74 . 25 + 25 . 26 . 4 - 7000
= 4 . 25 . ( 74 + 26 ) - 7000
= 4 . 25 . 100 - 7000
= 100 . 100 - 7000
= 10000 - 7000
= 3000
Ta có: \(2^2.74.5^2+5^2.26.4-2^2.5^2.70=2^2.5^2.\left(74+26-70\right)\)\(=100.\left(74-70+26\right)\)\(=100.\left(4+26\right)\)\(=100.30=3000\)