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) 64.25+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!

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 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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

1=???

2=(4x25)x37=100x37=3700

3=33750

4=28x(64+36)=28x100=2800

5=14386

6=810

7=(43x[42+57+1])-90=4300-90=4210

8=2772

a,4.37.25

=(4.25)+25

=100+25

=125

đó tui giải câu a thu

mấy câu khác dễ ợt

2772

58.42+32.8+5.16

=58.42+16.16+5.16

=58.42+16.(16+5)

=58.42+16.21

=58.42+8.42

=42.(58+8)

=42.66

=2772

\(58.42+32.8+5.16 \)

\(= 58.42+32.8+5.2.8\)

\(= 58.42+32.8+10.8\)

\(= 58.42+(32+10).8\)

\(= 58.42+42.8\)

\(= 42(58+8) \)

\(= 42.66\)

\(= 2772\)