36 x 47 + 33 x 36 + 9 x 80

= 36 x (47 + 33) + 9 x 80

= 36 x 80 + 9 x 80

= 80 x (36 + 9)

= 80 x 45

=3600

=47 x (52+49-1)=47x 100= 4700

47 x 52 + 47 x 49 - 47

= 47 x 52 + 47 x 49 - 47 x 1

= 47 x (52+49-1)

= 47 x 100

= 4700

4700 kết quả học t

a: =428(36+64)=42800

b: =512(47-37)=5120

c: =72x100=7200

\(428×(36+64)\)

\(=428×100\)

\(=42800\)

\(512×(47-37)\)

\(=512×10\)

\(=5120\)

\(72×(4×25)\)

\(=72×100\)

\(=7200\)

\(\left(\dfrac{4+5}{9}\right)\text{×}\dfrac{3}{7}\)

\(=1\text{×}\dfrac{3}{7}\)

\(=\dfrac{3}{7}\)

a, 428 x 36 + 64 x 428

=  428 x (36 + 64)

=  428 x 100

= 42800

b, 512 x 47 - 37 x 512

=  512 x (47 - 37)

= 512 x 10

= 5120

câu này mik bị lú nên hok lm

d) 4/9 x 3/7 + 5/9 x 3/7

= 3/7 x (4/9 + 5/9)

= 3/7 x 1

= 3/7

` 10000 – 47 xx 72 – 47 xx 28 `
`=10000-47xx(72+28)`
`=10000-47xx100`
`=100xx100-47xx100`
`=100xx(100-47)`
`=100xx53`
`=5300`

`10 000 - 47 xx 72 - 47xx28`

`=10 000 - 47 xx(72+28)`

`=10 000 - 47xx100`

`=10 000 - 4700`

`=5300`

 10000 – 47 x 72 + 47 x 28 

=10000-(47x(72+28)

=10000-4700

=5300

\(7,15\times47+7,15\times52+7,15\)

\(=7,15\left(47+52\right)+7,15\)

\(=336,05+371,8+7,15\)

\(=7,15\)

9x4x198-6x18x17-36x47

= 7128-1836-1692

= 3600

Biểu thức trên ,ta được:

36*(198-3*17-47)=36*100=3600

3600 tk tui nhe

\(9\cdot4\cdot198-6\cdot18\cdot17-36\cdot47=36\cdot\left(198-47\right)-6\cdot18\cdot17\)

\(=6\cdot\left(6\cdot151\right)-6\left(18\cdot17\right)=6\cdot906-6\cdot306=6\left(906-306\right)=6\cdot600=3600\)

9 x 4 x 198 - 6 x 18 x 17 - 36 x 47

= 36 x 198 - 36 x 51 - 36 x 47

= 36 x (198 - 51 - 47)

= 36 x 100

= 3600  

Đáp án là : 3600

Tks Bạn Rất Nhiều