神机妙算:2842÷14+74×389÷(56-34)3.6×99+3.634÷(35×38)45×67+17÷5472×(59-512)-数学
题文
神机妙算: 2842÷14+74×3
3.6×99+3.6
72×(
|
答案
(1)2842÷14+74×3 =2848÷7÷2+74×3, =203+222, =425; (2)
=
=10
(3)3.6×99+3.6 =(99+1)×3.6, =100×3.6, =360; (4)
=
=
(5)
=
|
题文
神机妙算: 2842÷14+74×3
3.6×99+3.6
72×(
|
答案
(1)2842÷14+74×3 =2848÷7÷2+74×3, =203+222, =425; (2)
=
=10
(3)3.6×99+3.6 =(99+1)×3.6, =100×3.6, =360; (4)
=
=
(5)
=
|