有若干张卡片,其中一部分写着1.1,另一部分写着1.11,它们的和恰好是43.21。写有1.1和1.11的卡片各有多少张?
2023-06-09
A. 8张,31张
B. 28张,11张
C. 35张,11张
D. 4l张,l张
参考答案:A
B. 28张,11张
C. 35张,11张
D. 4l张,l张
参考答案:A
代入法,8×1.1+31×1.11=43.21,符合题意。故答案为A。
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