125 + 125 + 124 + 124 - 235
= ( 125 x 2 ) + ( 124 x 2 ) - 235
= 250 + 248 - 235
= 498 - 235
= 263
125+125+124+124+235=263
123456x2356=121100
=250+248-235
=498-235
=263
290883540
125+125+124+124-235
=125x2+124x2-235
=250+248-235
=250+(248-235)
=250+13
=263
123465x2356=290883540
a) 125 + 125 + 124 + 124 - 235
= 125 x 2 + 124 x 2 - 235
= 2 . ( 125 +124 ) - 235
= 2 . 249 - 235
= 498 - 235
= 263
b) Tích 2 số đã cho là:
123465 x 2356 = 290883540
Đáp số: 290883540