问题
解答题
计算: ①-5+(+3)-(-7)-(+1) ②-24×(
③-12011+4×(-3)2+(-6)÷(-2) ④
|
答案
①原式=-2+7-1=4;
②原式=-24×
-24×1 2
-24×(-2 3
)=-12-16+20=-8.5 6
③原式=-1+36+3=38;
④原式=3ab2-1+7a2b-2+2ab2+2-2a2b=5ab2+5a2b+1.
计算: ①-5+(+3)-(-7)-(+1) ②-24×(
③-12011+4×(-3)2+(-6)÷(-2) ④
|
①原式=-2+7-1=4;
②原式=-24×
-24×1 2
-24×(-2 3
)=-12-16+20=-8.5 6
③原式=-1+36+3=38;
④原式=3ab2-1+7a2b-2+2ab2+2-2a2b=5ab2+5a2b+1.