计算(1)3.6-2.75+0.4-0.25(2)0.75×56+34×16(3)2-613÷926-23(4)2x-32x=45(5)12(2x-1)=32.-数学
题文
计算 (1)3.6-2.75+0.4-0.25 (2)0.75×
(3)2-
(4)2x-
(5)
|
答案
(1)3.6-2.75+0.4-0.25, =3.6+0.4-(2.75+0.25), =4-3, =1; (2)0.75×
=0.75×(
=0.75×1, =0.75; (3)2-
=2-
=2-(
=2-2, =0; (4)2x-
|