\(58\cdot42+32\cdot8+5\cdot16\)

\(=58\cdot42+16\cdot\left(16+5\right)\)

\(=58\cdot42+16\cdot21\)

\(=42\left(58+8\right)\)

\(=42\cdot64=2688\)

Tham Khảo :

64x25+23x25+25=25(64+23+1)=25x88=2200

b,58x42+32x8+5x16=58x42+16x16+5x16

=58x42+16(16+5)=58x42+16x21=58x42+8x42=42(58+8)=42x56=2352.

1673

2604

\(58.42+8\left(32+5.2\right)=58.42+8.42=42\left(58+8\right)=42.64=2772\)

58.42+32.8+5.16=58.42+32.8+5.8.2=58.42+32.8+10.8=58.42+(32+10).8=58.42+42.8=(58+8).42=66.42=2772

58.42 + 32.8 + 5.16 = 91.22 + 5.16

                              = 96.38

Click mik đi , mik click lại cho !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Tim x 

890 :x=35du 5

58×42+32×8+5×16=91×22+5×16=96×38=3648

B công thức SC ×thương +dư

a) \(64\cdot25+35\cdot25+25=25\cdot\left(64+35+1\right)=2500\)

b) \(92\cdot42+32\cdot8+5\cdot16\)

\(=8\cdot21\cdot23+16\left(16+5\right)\)

\(=8\cdot21\cdot23+16\cdot21\)

\(=8\cdot21\cdot\left(23+2\right)\)

\(=8\cdot21\cdot25\)

\(=2\cdot21\cdot4\cdot25\)

\(=42\cdot100\)

\(=4200\)

c) \(\left(42\cdot43+43\cdot57+43\right)-360:4\)

\(=\left[43\cdot\left(42+57+1\right)\right]-360:4\)

\(=4300-90\)

\(=4210\)

a) 64.25+35.25+25

=25(64+35+1)=25.100=2500

b) 58.42+32.8+5.16

=2436+256+80=2772

c) (42.43+43.57+43)-360

=43(42+57+1)-360=43.100-360=4300-360=3940

Học tốt!

a) (42 x 43 + 43 x 57 + 43) - 360 : 4

= 43 x ( 42 x 57) + 43 - 360 :4

= 43 x 99 + 43 - 90

= 4257 + 43 - 90

= 4300 - 90

= 4210

b) (372 - 194 x 4) + (981 : 9 - 13)

= (372 - 776) + (109 - 13)

= -404 + 96

= -308

c) 456 : 2 x 18 + 456 : 3 - 102

= 228 x 18 + 152 - 102

= 4104 + 152 - 102

= 4256 - 102

= 4154