35,7.0,1+21,2+8,8+6,43

 =3,57+21,2+8,8+6,43

 =(3,57+6,43)+(21,2+8,8)

 =10+30

 =40

Ca Hai bao can nang so kg la :

             45 + 17 =    62 (kg)
                   dap so : 62 kg 

a) 3,24 x ( 2,6 + 7,4 )

    3,24 x  10

        32,4

b) 35,7 x 99 + 35,7 x 1 

    35,7 x ( 99 + 1 )

     35,7 x 100

        3570

a, = 3,24 x (2,6 + 7,4) = 3,24 x 10 = 32,4
b, = 35,7 x (99 + 1) = 35,7 x 100 = 3570

= 5,65 x (13,8 + 21,9) + 35,7 x (3,21 + 1,14) 

= 5,65 x 35,7 + 35,7 x 4,35

= 35,7 x (5,65 + 4,35) = 35,7 x 10 = 357

= 5,65 x (13,8 + 21,9) + 35,7 x (3,21 + 1,14)
= 5,65 x 35,7 + 35,7 x 4,35
= 35,7 x (5,65 + 4,35) = 35,7 x 10 = 357

k mk nha $_$

\(5,65\cdot13,8+35,7\cdot3,21+5,65\cdot21,9+35,7\cdot1,14\)

\(=5,65\cdot\left(13,8+21,9\right)+35,7\cdot\left(3,21+1,14\right)\)

\(=5,65\cdot35,7+35,7\cdot4,35\)

\(=35,7\cdot\left(5,65+4,35\right)\)

\(=35,7\cdot10=357\)

\(a.1,25\times5\times6,3\div0,125\times2\\ =\left(5\times2\right)\times\left(1,25\div0,125\right)\times6,3\\ =10\times10\times6,3=630\)

\(b.12,5\times6,9+0,1\times6,9\times865\times6,9\\ =6,9\times\left(12,5+86,5+1\right)\\ =6,9\times100=690\)

a: \(=4,86\cdot10=48,6\)

75,38*104-75,38/0,125+75,38/0,25
7839,52-75,38/0,125+75,38/0,25
7839,52-603,04+75,38/0,25
7839,52-603,04+301,52
Tính phép cộng hoặc phép trừ từ trái sang phải.
7839,52-603,04+301,52
7236,48+301,52
7538
HỌC TỐT NHA

 

a: \(2\cdot4\cdot8\cdot0,5\cdot0,125\cdot0,25\cdot\left(0,4321+0,5679\right)\)

\(=\left(2\cdot0,5\right)\cdot\left(4\cdot0,25\right)\cdot\left(8\cdot0,125\right)\cdot1\)

\(=1\cdot1\cdot1\cdot1=1\)

b: \(3,7\cdot3,8+8,3\cdot3,7-0,4\cdot3,7\cdot5\)

\(=3.7\left(3,8+8,3\right)-3,7\cdot2\)

\(=3,7\cdot12,1-3,7\cdot2\)

\(=3,7\left(12,1-2\right)=3,7\cdot10,1=37,37\)

c: \(0,51:0,1+0,57:1,9+0,49:0,1-0,3\)

\(=0,51\cdot10+0,49\cdot10+0,57:1,9-0,3\)

\(=10\left(0,51+0,49\right)+0,3-0,3\)

\(=10\cdot1=10\)

35,7x101-35,7

=(35,7-35,7)x101

=0x101

=0

các thím đừng đọc sai đề

=35,7*(101-1)

=35,7*100=3570

3602.13