a) (52+1)-9.3
b) 80-(4.52-3.23)
c) [(-18)+(-7)]-15
d) (-219)-(-229)+12.5
BÀI 1
a, (5 mũ 2 + 1) -9.3 b,80 -(4.5 mũ 2 - 3.2 mũ 3)
c,[(-18) +( -7)] -15 d,(-219)-(-229) + 12.5
a) (52 + 1) - 9.3
= 26 - 9.3
= 16.7
b) 80 - (4.52 - 3.23)
= 80 - (20.25 - 32.768)
= 80 - (-12.518)
= 92.518
c)[(-18) + (-7)] -15
= -25 - 15
= -40
d) (-219) - (-229) + 12.5
= 10 + 12.5
= 22.5
Tick cho mik nhé
2 tính
a ) (52+1 ) - 9.3
b) 80- ( 4.52 - 3.23)
c) [ ( -18 ) + ( -7 ) ] -15
d) ( -219 ) - ( -229 ) + 12.5
a) (5^2+1)-9.3= 26-27=-1
b) 80 - (4.5^2-3.2^3)=80-(100-24)=4
c) [(-18)+(-7)]-15=-25-15=-40
d) (-219)-(-229)+12.5=10+12.5=22.5
a,(5^2+12)-9.3
b,80-(4.5^2-3.2^3)
c,[(-18)+(-7)] -15
d,(-219)-(-229)+12.5
ai nhanh minh tick cho
c) [(-18) + (-7)] -15
d) (-219) - (229) + 12.5
c)
= -18 - 7 - 15
= -40
d)
= -219 - 229 + 60
= -388
[(-18) + (-7)] -15 = (-25) -15
= - ( 25 + 15 )
= -40
(-219) - (229) + 12.5 = (-219) - (+229) + 60
= + ( 219 + 229 ) + 60
= 10 + 60
= 70
c) -18 -7 -15 = -40
d) - 219 - 229 + 12,5 = -435,5
Thực hiện phép tính:
a, 80 - 4 . 5 2 - 3 . 2 3
b, 5 6 : 5 4 + 2 3 . 2 2 - 1 2018
c, [36.4 – 4. 82 - 7 . 11 2 ]:4 – 2019 0
d, 303 – 3.{[655 – (18:2+1). 4 3 +5]}: 10 0
a, 80 - 4 . 5 2 - 3 . 2 3
= 80 – (4.25 – 3.8)
= 80 – 76 = 4
b, 5 6 : 5 4 + 2 3 . 2 2 - 1 2018
= 5 2 + 2 5 - 1
= 25 + 32 – 1 = 56
c, [36.4 – 4. 82 - 7 . 11 2 ]:4 – 2019 0
= (144 – 4. 5 2 ):4 – 1
= (144 – 100):4 – 1
= 11 – 1 = 10
d, 303 – 3.{[655 – (18:2+1). 4 3 +5]}: 10 0
= 303 – 3.(655 – 10.64 + 5):1
= 303 – 10 = 293
Thực hiện phép tính:
a) 80 - ( 4 . 5 2 - 3 . 2 3 )
b) [ 36 . 4 - 4 . ( 82 - 7 . 11 ) 2 ] : 4 - 201 9 0
c) 5 6 : 5 4 + 2 3 . 2 2 - 1 2018
d) 303 - 3 . { [ 655 - ( 18 : 2 + 1 ) . 4 3 + 5 ] } : 10 0
a) 80-(4.52-3.23)=80-100+24=4
b)[36.4-4.(82-7.11)2]:4-20190
={4.[36-(82-7.11)2]}:4-1
=[36-(82-7.11)2]-1
=11-1=10
c)56:54+23.22-12018
=52+25-1
=25+32-1=56
d)303-3.{[655-(18:2+1).43+55]}:100
=303-3.[(655-9-1).43+55]:1
=303-3[655-640+5]
=303-3(20)
=303-60=243
80 – (4.52 – 3.23).
Bài toán 1 : Thực hiện phép tính.
a) 80 - (4.52 - 3.23)
b) 56 : 54 + 23.22 - 12017
a) 80 - (4.52 - 3.23 )
= 80 - ( 4 . 25 - 3. 8 )
= 80 - ( 100 - 24 )
= 80 - 76 = 4
b) 56 : 54 + 23 . 22 - 12017
= 52 + 25 - 1
= 25 + 32 - 1
= 57 -1 = 56
a) 80 - (4.52 - 3.23)
= 80 - (4.25 - 3.8)
= 80 - (100 - 24)
= 80 - 76
= 4
b) 56 : 54 + 23 . 22 - 12017
= 52 + 25 - 1
= 25 + 32 - 1
= 56
Chúc bạn học tốt!! ^^
2. Tính:
a) (52 + 1) - 9.3; b) 80 - (4.52 - 3.23);
c) [(-18) + (-7)] - 15; c) (-219) - (-229) + 12.5.