17/58+36/98+65/3-32/5=?
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a) (135 - 35) . (-37) + 37 . (-42 - 58)
= 100 . 0 . (-100)
= 0
b) -65 . (87 - 17) - 87 . (17 - 65)
= -65 . 70 - 87 . (-48)
= -4550 - 135
= -4415
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a. 17 dam2 5 m2 =1705m2
b. 16 hm2 51 m2 = 16051m2
c. 6542 cm2 = 65 dm242 cm2
d. 203040089 m2 = 20 km2 3 hm2 4 dam2 89 m2
e. 3 dm2 27 cm2 - 36 cm2 = 291 cm2
f. 63 dm2 75 cm2 + 58 dm2 46 cm2 = 1 m2 22 dm2 21 cm2
g. 3 dm2 5 cm2 : 5 = 61 cm2
h. 44 dm2 x 4 = 1 m2 76 dm2
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a) \(36.\left(-57\right)-57.64\)
\(=36.\left(-57\right)+\left(-57\right).64=\left(-57\right).\left(36+64\right)\)
\(=\left(-57\right).100=-5700\)
b)\(32.\left(-17\right)+\left(-18\right).17-50.13\)
\(=\left(-32\right).17+\left(-18\right).17-50.13\)
\(=17.\left(-32-18\right)-50.13=17.\left(-50\right)+\left(-50\right).13\)
\(=\left(-50\right).\left(17+13\right)=\left(-50\right).30=-150\)
c)\(-\left(-35\right)+12-|-35|-42\)
\(=35+12-35-42=12-42=-30\)
d)\(\left(-15-12\right):\left(-3\right)^2+5-13.\left(-2\right)+\left(-64\right):2^3\)
\(=-27:9+5+26-64:8=-3+5+26-8=20\)
e)\(\left(135-35\right).\left(-37\right)+37.\left(-42-58\right)=100.\left(-37\right)+37.\left(-100\right)\)
\(=\left(-100\right).37+37.\left(-100\right)=\left(-100\right).\left(37+37\right)\)
\(=\left(-100\right).74=-7400\)
Chúc em học tốt!!!!!!
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B)x+36=98
X=98-36
X=62
C)58-x+32=45
58-x=45-32
58-x=13
X=58-13
X=45
a) 36x - 54 = 18
36x = 18 + 54
36x = 72
x = 2
b) x + 36 = 98
x = 98 - 36
x = 62
c) 58 - x + 32 = 45
58 - x = 45 - 32
58 - x = 13
x = 58 - 13
x = 45
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9342 chắc chắn 100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%
ĐS: 15 và 32523/42630