37.24 + 37.76 + 63 . 79 + 21 . 63

= 37 . ( 24 + 76 ) + 63 . ( 79 + 21 )

= 37 . 100 + 63 . 100

= 3700 + 6300

= 10000

a) 37.24 + 37.76 + 63.79 + 21.63

=  37.(24 + 76) + 63.(79 + 21)

=  37.100 + 63. 100

=  100.(37 +63)

=  100.100

= 10000

b) 69.113 - 27.69 + 69.14 + 31

=  69.(113 - 27 + 14) +31

=  69.100 + 31

= 6931

c) 72.121 + 27.121 + 121

=  121.(72 + 27 + 1)

=  121.100

=  12100

Sửa đề

a) 37.24 + 37.76 + 63.79 + 21.63

= 37.(24 + 76) + 63.(79 + 21)

= 37.100 + 63.100

= 100.(37 + 63)

= 100.100

= 10000

b) 49 + (139 - 172 + 99) - (139 + 199 - 172)

= 49 + 139 - 172 + 99 - 139 - 199 + 172

= 49 + (139 - 139) + (172 - 172) + (99 - 199)

= 49 + 0 + 0 - 100

= -51

a) 9700

b) 30

c) 40

d) 79

dài vậy ngại làm lắm t chỉ làm câu a , b thôi nha

kết quả là 6862 chứ mấy!

=37.(24+76)+63.(79+21)

=37.100+63.100

=100.(37+63)

=100.100

=10000

37.24+37.76+63.79+63.21

=37.(24+76)+63.(79+21)

=37.100+63.100

=100.(37+63)

=100.100

=10000

\(2.17.12+4.6.21+8.3.62\)

\(=24.17+24.21+24.62\)

\(=24\left(17+21+62\right)\)

\(=24.100\)

\(=2400\)

\(37.24+37.76+63.79+63.21\)

\(=37\left(27+76\right)+63\left(79+21\right)\)

\(=37.100+63.100\)

\(=3700+6300\)

\(=10000\)

a)\(37.24+37.76+63.79+63.21=37.\left(24+76\right)+63.\left(79+21\right)\)

\(=37.100+63.100\)

\(=\left(37+63\right).100\)

\(=100.100\)

\(=10000\)

b)\(27.\left(13+48\right)+27.\left(22+17\right)=27.\left(13+48+22+17\right)\)

\(=27.100\)

\(=2700\)

Woa,cảm ựn bạn nha,may quá mk làm đúng rồi

a: =17x100-120=1700-120=1580

a) \(17\cdot85+15\cdot17-120\)
\(=17\cdot\left(85+15\right)-120\)
\(=17\cdot100-120\)
\(=1700-120\)
\(=1580\)
b) \(27\cdot77+24\cdot27-27\)
\(=27\cdot\left(77+24-1\right)\)
\(=27\cdot100\)
\(=2700\)