48 × 19 + 48 × 115 + 134 × 52
= 48 × ( 19 + 115 ) + 134 × 52
= 48 × 134 + 134 × 52
= 134 × ( 48 + 52 )
= 134 × 100
= 13400
48 * 19 + 48 * 115 + 134 * 52
= 48 * ( 19 + 115 ) + 134 * 52
=48* 134 + 134 * 52
= 134 * ( 48 + 52 )
= 134 x 100
= 13 400
^^ Học tốt nha!
Mấy câu sau cứ lm tương tự zậy! :v
48 x 19 + 48 x 115 + 134 x 52
= 48 x ( 19 + 115 ) + 134 x 52
= 48 x 134 + 134 x 52
= 134 x ( 48 + 52 )
= 134 x 100
= 134 00
48 x 19 + 48 x 115 + 134 x 52
= 48 x ( 19 + 115 ) + 134 x 52
= 48 x 134 x 134 x 52
= ( 48 + 52 ) x 134
= 100 x 134
= 13 400
27 x 121 - 87 x 27 + 73 x 34
= 27 x ( 121 - 87 ) + 73 x 34
= 27 x 34 + 73 x 34
= ( 27 + 73 ) x 34
= 100 x 34
= 3 400
125 x 98 - 125 x 46 - 52 x 25
= 125 x ( 98 - 46 ) - 52 x 25
= 125 x 52 - 52 x 25
= ( 125 - 25 ) x 52
= 100 x 52
= 5 200
