问题
解答题
细心算一算 ①4.8-(-1.2)+(-6); ②(-
③1-(5-7)÷(-3)3; ④-62×(
|
答案
①4.8-(-1.2)+(-6)
=4.8+1.2-6
=0;
②(-
)×(-13 4
)÷(-21 2
)1 4
=-
×3 4
×3 2 4 9
=-
;1 2
③1-(5-7)÷(-3)3
=1-(-2)÷(-27)
=1-2 27
=
;25 27
④-62×(
-2 3
)-231 2
=-36×
-81 6
=-14.