1454 + 4545 = 5999

454 + 456 = 910

123 + 456 = 579

Trả lời :

1454 + 4545 = 5999

454 + 456 = 910 

123 + 456 = 579

~ Hok tốt ~

trả lời 

1454+4545=5999

454+456=910

123+456=579

chúc bạn học tốt!

Ta có:
A = (457/1 + 1) + (456/2 + 1) + ... + (2/456 + 1) + (1/457 + 1) - 457
A = 458 + 458/2 + ... + 458/456 + 458/457 - 457
A = 458 (1 + 1/2 + ...+ 1/456 + 1/457) - 457
Xét 1 + 1/2 + ... + 1/456 + 1/457, ta có
1 = 1
1/2 = 1/2
1/3 + 1/4 > 1/4 + 1/4 = 1/2
1/5 + 1/6 + ... + 1/8 > 1/8 + 1/8 + ... + 1/8 = 1/2
1/9 + 1/10 +...+ 1/16 > 1/16 + 1/16 +...+ 1/16 = 1/2
1/17 + 1/18 + ... + 1/32 > 1/32 + ... + 1/32 = 1/2
1/33+ 1/34 + ... + 1/64 > 1/64 + ...+ 1/64 = 1/2
1/65 + 1/66 + ...+ 1/128 > 1/128 + ... + 1/128 = 1/2
1/129 + 1/130 + ... + 1/256 > 1/256 + ...+ 1/256 = 1/2
1/257 + 1/258 + ... + 1/457 > 1/457 + ... + 1/457 = 201/457 > 0,4
Vậy 1 + 1/2 + ... + 1/456 + 1/457 > 1 + 1/2 + 1/2 + 1/2 + 1/2 + 1/2 + 1/2 + 1/2 + 1/2 + 0,4 = 5,4
Vậy A > 458*5,4 - 457 = 2016,2
Vậy A > 2016.
 

Ta có:
A = (456/2 + 1) + ... + (2/456 + 1) + (1/457 + 1) + 1
A = 458 + 458/2 + ... + 458/456 + 458/457 - 458/458
A = 458 (1/2 + ...+ 1/456 + 1/457 + 1/458)
Xét 1/2 + ... + 1/456 + 1/458, ta có
1/2 = 1/2
1/3 + 1/4 > 1/4 + 1/4 = 1/2
1/5 + 1/6 + ... + 1/8 > 1/8 + 1/8 + ... + 1/8 = 1/2
1/9 + 1/10 +...+ 1/16 > 1/16 + 1/16 +...+ 1/16 = 1/2
1/17 + 1/18 + ... + 1/32 > 1/32 + ... + 1/32 = 1/2
1/33+ 1/34 + ... + 1/64 > 1/64 + ...+ 1/64 = 1/2
1/65 + 1/66 + ...+ 1/128 > 1/128 + ... + 1/128 = 1/2
1/129 + 1/130 + ... + 1/256 > 1/256 + ...+ 1/256 = 1/2
1/257 + 1/258 + ... + 1/458 > 1/458 + ... + 1/458 = 202/458
Vậy 1/2 + ... + 1/456 + 1/457 > 1/2 + 1/2 + 1/2 + 1/2 + 1/2 + 1/2 + 1/2 + 1/2 + 202/458 = 4 + 202/458 = 2034/458
Vậy A > 458*2034/458 = 2034
Vậy A > 2016. 

456 x 36 + 456 x 61 + 4 x 456 - 456

= 456 x ( 36 + 61 + 4 - 1 )

= 456 x 100

= 45600

Nhớ tích cho mk nha

456x36+456x61+4x456-456

=456x(36+61+4-1)

=456x100

=45600

= 456 x ( 36 + 61 + 4 ) - 456

= 456 x 101                - 456

= 46056                     - 456 

= 45600

nhớ nhé

(59+63+87)+568875-(12345-456)=......?

=557195

(59+63+87)+568875-(12345-456)=557195

577195. Dung day, tick cho minh nha

a, 27.24+2079-27.1=648+2079-27=2700

b, -33+{[125+75]:5}=-33+40=7

c,-503+203=-300

Ta có :

456x36+456x61+4 x456+456

=456x(36+61+4+456)

=456x...tự tính

=...tự tính

Umm mình tưởng là cái 456 đó tính là 1 thôi chứ nhỉ ban???

\(456\times36+456\times61+4\times456+456\)

\(=456\times\left(36+61+4+1\right)\)

\(=456\times102\)

\(=45612\)

Học tốt

A

\(=5^3\cdot\left(5^2\right)^3=5^3\cdot5^6=5^9\left(A\right)\)

A

3⁶.27⁴.81¹⁰=3⁶.3¹².3⁴⁰=3⁵⁸

4.7101287e+27

159 - 59 = 100

456 -  98  = 358

256 - 198 = 158

159 - 59 = 100

456 - 98 = 358

256 - 198 = 58

Trả lời

159 - 59 = 100

456 - 98 =358

256 - 198 = 58

hok tốt .