《2025年每天100道口算题卡河北少年儿童出版社六年级数学下册苏教版》

求圆的周长和面积。
① r = 5.5m
C =
S =
② d = 5.2m
C =
S =
③ r = 7m
C =
S =
④ d = 6.4dm
C =
S =
⑤ d = 71cm
C =
S =
⑥ r = 6.1m
C =
S =
⑦ r = 12cm
C =
S =
⑧ d = 8.8m
C =
S =
⑨ d = 7.2dm
C =
S =
⑩ d = 1cm
C =
S =
⑪ r = 45cm
C =
S =
⑫ r = 10m
C =
S =
⑬ d = 80dm
C =
S =
⑭ d = 60cm
C =
S =
⑮ r = 4cm
C =
S =
⑯ d = 28dm
C =
S =

答案： ①~⑧34.54m 94.985m² 16.328m 21.2264m² 43.96m 153.86m² 20.096dm 32.1536dm² 222.94cm 3957.185cm² 38.308m 116.8394m² 75.36cm 452.16cm² 27.632m 60.7904m² ⑨~⑯22.608dm 40.6944dm² 3.14cm 0.785cm² 282.6cm 6358.5cm² 62.8m 314m² 251.2dm 5024dm² 188.4cm 2826cm² 25.12cm 50.24cm² 87.92dm 615.44dm²