= (4 x 25) x 113 - (5 x 20) x 112
= 100 x 113 - 100 x 112
= 100 x (113 - 112)
= 100 x 1
= 100
4×113×25-5×112×20
=(4×25)×113-(5×20)×112)
=100×113-100×112
=100×(113-112)
=100×1
=100
trước tiên ta lấy 4*25, 5*20 bằng 200 rồi sau đó lấy 112*113=12656
phép tính là: 12656 -200 -25=12631
\(4\times113\times25-5\times112\times20\)
\(=\left(4\times25\right)\times113-\left(5\times20\right)\times112\)
\(=100\times113-100\times112\)
\(=100\times\left(113-112\right)\)
\(=100\times1\)
\(=100\)
