\(a.7,8\times5,6-7,8\times4\)

\(=7,8\times\left(5,6-4\right)\)

\(=7,8\times1,6=12,48\)

\(b.3,3\times5,6+3,3\times77\)

\(=3,3\times\left(5,6+77\right)\)

\(=3,3\times82,6=272,58\)

\(c.44,56\times7,8-44,56\times1,2\)

\(=44,56\times\left(7,8-1,2\right)\)

\(=44,56\times6,6=294,096\)

# Kukad'z Lee'z

THANK YOU VERY MUCH

14,66 - 1,26 - 2,66 - 5,74 =  14,66 - 2,66 - ( 1,26 + 5,74 )

                                     =  12 - 7 = 5

174,56 - 45,25 - 44,56 - 15,75 = ( 174,56 - 44,56 ) - ( 45,25 + 15,75 )

                                            = 130 - 61 = 69

13,28 x 9,9 + 1,328 = ( 13,28 - 1,328 ) x 9,9

                             = 11,952 x 9,9 = 118,3248

24,65 x 9,99 + 0,2465 = ( 24,65 - 0,2465 ) x 9,99

                                 = 243,790965

\(75\%\times x+\frac{3}{4}\times x+x=30\)

\(\frac{3}{4}\times x+\frac{3}{4}\times x+x=30\)

\(x\times\left(\frac{3}{4}+\frac{3}{4}+1\right)=30\)

\(x\times\frac{5}{2}=30\)

\(\Rightarrow x=30\div\frac{5}{2}=12\)

\(75\%\times x+\frac{3}{4}\times x+x=30\)

\(\frac{3}{4}\times x+\frac{3}{4}\times x+x=30\)

\(x\left(\frac{3}{4}+\frac{3}{4}+1\right)=30\)

\(x.\frac{5}{2}=30\)

\(x=30\div\frac{5}{2}\)

\(x=12\)

câu 1:         3,2

câu 2:         40

câu 3:         12

câu 4:         42

nhớ cho mình nhé !

bn giải ca ra giùm mk nhé rồi mk tk cho

(178 + 2) : 6 = 30

x = 178 nhé

\(75\%x+\frac{3}{4}x+x=30\)

\(\frac{3}{4}x+\frac{3}{4}x+x=30\)

\(\frac{6}{4}x+x=30\)

\(\frac{3}{2}x+\frac{2}{2}x=30\)

\(\frac{5}{2}x=30\)

\(x=20:\frac{5}{2}=\frac{20.2}{5}=\frac{40}{5}=8\)

nỏ biết

\(a,\left(15x+165\right):15=11+x\)

\(=>x+11=11+x\)

\(=>x-x=11-11\)

\(=>0=0\)

=>x nhận mọi giá trị