-(-27+85)+(157-35+73)
thuc hien phep tinh
73 . 35 + 27 . 19 - 20 . 73 + 81 . 27 + 85 . 73
73 . 35 + 27 . 19 - 20 . 73 + 81 . 27 + 85 . 73
= 73 . ( 35 - 20 + 85 ) + 27. ( 19 + 81 )
= 73 . 100 + 27. 100
= ( 73 + 27 ) . 100
= 100 . 100
= 10 000
73. 35+ 27.19- 20. 73+ 81. 27+ 85. 73
= 73.(35+ 85 - 20) + 27.(19+81)
=73.100 +27.100
=100.(27+73)
=100.100
=10000
Tick mìn nha
a) 23 – 53 : 52 + 12.22 | b) 5[(85 – 35 : 7) : 8 + 90] – 50 |
c) 2.[(7 – 33 : 32) : 22 + 99] – 100 | d) 27 : 22 + 54 : 53 . 24 – 3.25 |
e) (35 . 37) : 310 + 5.24 – 73 : 7 | f) 32.[(52 – 3) : 11] – 24 + 2.103 |
g) (72005 + 72004) : 72004 | h) (57 + 75).(68 + 86).(24 – 42) |
i) (75 + 79).(54 + 56).(33.3 – 92) | j) [(52.23) – 72.2) : 2].6 – 7.25 |
a: \(2^3-5^3:5^2+12\cdot2^2\)
\(=8-5+48\)
\(=51\)
b: \(5\cdot\left[\left(85-35:7\right):8+90\right]-5\)
\(=5\cdot\left[10+90\right]-5\)
=495
Đặt tính rồi tính:
a) 64 + 73 326 + 58 132 + 597
b) 157 – 85 965 – 549 828 – 786
Tính
a , 3 5 + 4 15 = b , 15 7 - 5 3 = c , 3 4 × 5 7 = d , 2 5 : 7 3 =
85.(35-27)-35.(85-27)
85.(35-27) - 35.(85-27)
= 85.8 - 35.58
=680.2030
=-1350
85.(35-27)-35.(85-27)
a) 25 - 53 : 52 + 12 : 22
b) 5 [ ( 85 - 35 : 7 ) : 8 + 90 ] - 50
c) 2. [ ( 7 - 33 : 32 ) 22 + 99 ] - 100
d) 27 : 22 + 54 : 53 . 24 - 3 . 25
e) ( 35 . 37 ) : 310 + 5 . 24 - 73 : 7
f) 32 . [ ( 52 - 3 ) : 11 ] - 24 + 2 . 103
g) ( 62007 - 62006 ) : 62006
h) ( 52001 - 52000 ) : 52000
i) ( 72005 + 72004 ) : 72004
j) ( 57 + 75 ) . ( 68 + 86 ) . ( 24 - 42 )
k) ( 57 + 79 ) . ( 54 + 56 ) . ( 33 . 3 - 92 )
l) [ ( 52 . 23) - 72 . 2 ) : 2 ] 6 - 7 . 25
Tính nhanh
85.(35-27)-35.(85-27)
Từ biểu thức, ta suy ra:
85.35-85.27-35.85+35.27
=27(35-85)
=27.-50
=-1350
\(85.\left(35-27\right)-35.\left(85-27\right)\)
\(=85.8-35.58\)
\(=680-2030\)
\(=-1350\)
Chúc bạn học tốt~~~
\(85.\left(35-27\right)-35.\left(85-27\right)\)
\(=85.8-35.58\)
\(=680-2030\)
\(=-1350\)
Tính nhanh: -(27 - 85) - (73 + 15)
-(27 - 85) - (73 + 15)
= -27 + 85 - 73 - 15
= (-27 - 73) + (85 - 15)
= -100 + 70
= -30