56*4+56*3+56*2+56

=56*4+56*3+56*2+56*1

=56*(4+3+2+1)

=56*10

=560

đáp án quá dễ là 560 chứ gì

224+168+112+56

=392+168

=560

56 x ( 4 + 3+ 2 + 1 )

56 x 10

560

=56*4+56*3+56*2+56*1

=56*[4+3+2+1]

=56*10

=560

cho mình xin ít coin nhé

tính nhanh à !

56 x 4 + 56 x 3 + 56 x 2 + 66

= 56 x4 + 56 x 3 + 56 x 2 + 56 + 10

=56 x ( 4 + 3 + 2 + 1) + 10

= 56 x 10 + 10

=10 x ( 56 + 1)

= 10 x 57

=570

56x4+56x3+56x2+56 [bạn viết nhầm 66 thành 56]

=56x(4+3+2+1)

=56 x 10

= 560

 56×4+56×3+56×2+56

=56×4+56×3+56×2+56x1

=56×(4+3+2+1)

=56×10

=560

chúc bạn học tốt :)

56*4*56*3+56*2+56=75432

37800

56.4.56.3+56.2+56

=56.(56.3.4+2+1)

=56.675

=37800

a) 3 x 4 + 3 x 56

= 3 x (4 + 56)

= 3 x 60

= 180

b) 34 x 56 + 34 x 59

= 34 x (56 + 59)

= 34 x 115

= 34 x 100 + 34 x 10 + 34 x 5

= 3400 + 340 + 170

= 3910

a)

3*4+3*56

=3*(56+4)

=3*60=180

b)34*56+34*59

=34*(56+59)

=34*115

=3910

1, = 3 + 56 - 56 - 56 = 3 - 56 = -53

2, = 43 . (2+4) = 43 . 6 = 258

1.(3+56) - (56 +56)

=  3+56 - 56+56

=  3 + 0 +56

=3+56 =59

2. 43.2 +43.4

=  43. (2+4)

=  43 .6

=  258

1, = 3 + 56 - 56 - 56 = 3 - 56 = -53

2, = 43 . (2+4) = 43 . 6 = 258

Chúc học tốt

1. 

$(5^{1986}-5^{1985}):5^{1985}=5^{1985}(5-1):5^{1985}=5-1=4$

2.

\((7^{846}+7^{847}):7^{846}=7^{846}(1+7):7^{846}=1+7=8\)

3.

\((9^{2018}-3^{4036}):6^{2006}=[(3^2)^{2018}-3^{4036}]:6^{2006}\)

$=(3^{4036}-3^{4036}):6^{2006}=0:6^{2006}=0$

4.

$(7^{80}.8^{70}-56^{70}):56^{70}$

$=[7^{10}(7.8)^{70}-56^{70}]:56^{70}$

$=[7^{10}.56^{70}-56^{70}]:56^{70}$

$=56^{70}(7^{10}-1):56^{70}=7^{10}-1$

5.

$4^{4016}:(4^{4017}-4^{4016})=4^{4016}:[4^{4016}(4-1)]$

$=4^{4016}:4^{4016}:3=1:3=\frac{1}{3}$

6.

$(12^{206}.2^{207}-24^{206}):24^{206}$

$=(12^{206}.2^{206}.2-24^{206}):24^{206}$

$=[(12.2)^{206}.2-24^{206}]:24^{206}$

$=(24^{206}.2-24^{206}):24^{206}$

$=24^{206}(2-1):24^{206}=2-1=1$

7.

$(5^2-24)^{8946}+4^{30}:2^{60}=1^{8946}+(2^2)^{30}:2^{60}$

$=1+2^{60}:2^{60}=1+1=2$

8.

$(37.8^{1007}-7.2^{3021}):8^{1007}=[37.8^{1007}-7.(2^3)^{1007}]:8^{1007}$

$=[37.8^{1007}-7.8^{1007}]:8^{1007}$

$=8^{1007}(37-7):8^{1007}=37-7=30$

42

=14x3

=42

= 42