计算: (1)25.7+(-7.3)+(-13.7)+7.3 (2)(
(3)(-2)2×5-(-2)3÷4 (4)(
|
(1)原式=25.7-7.3-13.7+7.3
=25.3+7.3-7.3-13.7
=33-21
=12;
(2)原式=
×36+11 6
×36-1 36
×363 4
=66+1-27
=40;
(3)原式=4×5+8÷4
=20+2
=22;
(4)原式=
÷(-2)1 4
=-
.1 8
计算: (1)25.7+(-7.3)+(-13.7)+7.3 (2)(
(3)(-2)2×5-(-2)3÷4 (4)(
|
(1)原式=25.7-7.3-13.7+7.3
=25.3+7.3-7.3-13.7
=33-21
=12;
(2)原式=
×36+11 6
×36-1 36
×363 4
=66+1-27
=40;
(3)原式=4×5+8÷4
=20+2
=22;
(4)原式=
÷(-2)1 4
=-
.1 8