甲、乙两人共储蓄640元,乙、丙两人共储蓄600元,甲、丙两人共储蓄440元.甲储蓄多少元?正确算式是(  ) A.(640+600+440)÷2-440 B.(640+600+440)÷2-600 C.(640+600+440)÷2-64

问题描述:

甲、乙两人共储蓄640元,乙、丙两人共储蓄600元,甲、丙两人共储蓄440元.甲储蓄多少元?正确算式是(  )
A. (640+600+440)÷2-440
B. (640+600+440)÷2-600
C. (640+600+440)÷2-640
D. (640+600+440)÷2

2个甲、乙、丙共储蓄:640+600+440,
甲、乙、丙共储蓄:(640+600+440)÷2,
甲储蓄:(640+600+440)÷2-600.
答选:B.