问题
解答题
递等式计算.
|
答案
(1)18×5×20
=18×(5×20)
=18×100
=1800
(2)1200-8×25
=1200-200
=1000
(3)(62+16)×27
=78×27
=2106
(4)20×26-80
=520-80
=440
(5)38+15×30
=38+450
=488
(6)125×7×8
=125×8×7
=1000×7
=7000
递等式计算.
|
(1)18×5×20
=18×(5×20)
=18×100
=1800
(2)1200-8×25
=1200-200
=1000
(3)(62+16)×27
=78×27
=2106
(4)20×26-80
=520-80
=440
(5)38+15×30
=38+450
=488
(6)125×7×8
=125×8×7
=1000×7
=7000