The sixth grade mathematics first volume winter vacation homework part of the answer! look underneath

1, the diameter of a front wheel is 1.32 meters. What is the circumference of the front wheel? 1.32× 3.14 = 4.1448 (m)

If the front wheel turns six times a minute, how many centimeters will it advance every minute? 6×4. 1448=24.8688 (m) =2486.88 (cm)

A: The circumference of the front wheel is 4.1448m, and it advances 2,486.88cm per minute.

The diameter of the wheel is 40 cm. How many times does a 3 1.4-meter-long steel wire ride?

40×3. 14= 125.6 (cm) = 1.256 (m)-wheel circumference

3 1.4÷ 1.256=25 (turn)-How many turns does the wheel turn?

A: The wheel has to turn 25 times.