\(15.8-15-8+15.8+15-8\)
\(=15.\left(8-1+1\right)+8.\left(15-1-1\right)\)
\(=15.8+8.13\)
\(=8.\left(15+13\right)\)
\(=8.28\)
\(=224\)
15.8 − 15 − 8 + 15.8 + 15 − 8
= 15. (8 − 1 + 1 )+ 8. (15 − 1 − 1)
= 15.8 + 8.13
= 8. (15 + 13)
= 8.28
= 224
15 . 8 - 15 - 8 + 15 . 8 + 15 - 8
= 15 . 8 - 23 + 15 . 8 + 7
= 15 . 8 + 15 . 8 - 23 + 7
= 15 . ( 8 +8 ) - ( 23 - 7 )
= 15 .16 - 15
= 15 . ( 16 - 1 )
= 15 . 15
= 225
15.8 − 15 − 8 + 15.8 + 15 − 8
= 15. (8 − 1 + 1 )+ 8. (15 − 1 − 1)
= 15.8 + 8.13
= 8. (15 + 13)
= 8.28
= 224
trả lời:
15 . 8 - 15 - 8 + 15 . 8 + 15 - 8
= 15 . ( 8 - 1 +1 ) + 8 . ( 15 - 1 -1)
= 15.8 + 8.13
= 8. ( 15 = 13)
= 8. 18
= 244
học tốt!!!!
\(\text{15 x 8 - 15 - 8 + 15 x 8 + 15 - 8 }\)
\(=15\cdot\left(8-1+1\right)+8\cdot\left(15-1-1\right)\)
\(=15\cdot8+8\cdot13\)
\(=8\cdot\left(15+13\right)\)
\(=8\cdot28\)
\(=224\)
15 x 8 - 15 - 8 + 15 x 8 + 15 - 8
= 15 x ( 8 - 1 + 1 ) + 8 x ( 15 - 1 - 1 )
= 15 x 8 + 8 x 13
= 8 x 28
= 224
15 x 8 - 15 - 8 + 15 x 8 + 15 - 8 = ??
15x(8-1+1)+8x(15-1-1)
15x8+8x13
8x(15+13)
8x 28
224
