把下列算式写成省略括号或加号的形式(-9)-12+(-3)-(-7)
问题描述:
把下列算式写成省略括号或加号的形式(-9)-12+(-3)-(-7)
答
(-9)-12+(-3)-(-7) =-9-12-3+7 =-24+7 =-16
把下列算式写成省略括号或加号的形式(-9)-12+(-3)-(-7)
(-9)-12+(-3)-(-7) =-9-12-3+7 =-24+7 =-16