问题
解答题
脱式计算.
|
答案
(1)218-18+25×4
=200+100
=300
(2)1300+450÷45
=1300+10
=1310
(3)(79+63÷3)×5
=(79+21)×5
=100×5
=500
(4)21×[(75+39)÷38]
=21×(114÷38)
=21×3
=63
脱式计算.
|
(1)218-18+25×4
=200+100
=300
(2)1300+450÷45
=1300+10
=1310
(3)(79+63÷3)×5
=(79+21)×5
=100×5
=500
(4)21×[(75+39)÷38]
=21×(114÷38)
=21×3
=63