64除以28乘以35用简便方法
64÷28×35
=64÷4÷7×35
=(64÷4)×(35÷7)
=16×5
=80
28和35都有公因数7,那么阿64除以28乘以35可以写成64除以7除以4乘7乘5,除以7和乘以7就抵消了,变为64除以4乘5,一位数的方便口算,得80,望采纳
64÷28x35
=64÷4÷7x35
=64÷4x35÷7
=16x5
=80
64÷28×35
=64÷4÷7×5×7
=64÷4×5
=16×5
=8×2×5
=8×10
=80
64÷28x35
=(16x4)x(5x7)÷28
=(16x5)x(4x7)÷28
=80