Calculation 15-(-23)+(- 12)
Calculate (-2)+(-4)+3
Calculation (-10)+5-(- 15)
Calculation (-2.5)+3.5+(-6)
Calculation 13+(-24)+27
Calculate (-8)+ 12+(-6)
Calculate (-3)+7-(-5)
Calculate (-4)+9+(-7)
Calculate 0+(-8)+ 10.
Calculate (-2.6)+(4.8)+(- 1.8)
Calculate (-7)+ 12-(- 14)
Calculate 16+(-25)+(-8)
Calculation (-15)+7-(-24)
Calculation (-3.2)+4.5+(-6.7)
Calculate 20+(-30)+ 18.
Calculate (-8.4)+ 15+(-9.6)
Calculation (-4.5)+28-(-3.5)
Calculation (-10.2)+23+(-5.8)
Calculate 30+(-40)+25
Calculation (-5.6)+(3.9)+(-2.3)
The above is only part of the problem, the rest are similar, but the numbers and operation symbols involved will be different. The difficulty of mixed operation lies in the need to consider the priority and symbol of operation, which requires students to calculate carefully. Through a lot of practice, students' computing ability and understanding of mathematics can be improved.