Question

人教版六下数学书21页22页答案

Answer 1

1.21 22.4

2.（1）3.14x5x5x2=157

(2)3.14x(4/2）x(4/2）x12=150.72

(3)3.14x(8/2)x(8/2)x8=401.92

3.3.14x(56/2)x(56/2)x87214173.12

4.3.14x(3/2)x(3/2)x0.5x2=7.065

80/16=5

这是21页的答案