问题
解答题
计算. (1)|-2|+(
|
答案
(1)原式=2+3×1-3+1
=2+3-3+1
=3;
(2)原式=(9
+2
×51 5
-4×2
)÷42 2 2
=(9
+2
-22
)÷42 2
=8
÷42 2
=2.
计算. (1)|-2|+(
|
(1)原式=2+3×1-3+1
=2+3-3+1
=3;
(2)原式=(9
+2
×51 5
-4×2
)÷42 2 2
=(9
+2
-22
)÷42 2
=8
÷42 2
=2.