tinh bang cach thuan tien nhat:
a) 23,75×99,99+23,75÷100
b)13,5×9,9+13,5÷10
tinh bang cach thuan tien nhat: a) 23,75×99,99+23,75÷100 b)13,5×9,9+13,5÷10
By Liliana
By Liliana
tinh bang cach thuan tien nhat:
a) 23,75×99,99+23,75÷100
b)13,5×9,9+13,5÷10
`23,75×99,99+23,75÷100`
`=23,75×9999/100+23,75×1/100`
`=23,75×(9999/100+1/100)`
`=23,75×10000/100`
`=23,75×100`
`=23,75`
b/ `13,5×9,9+13,5÷10`
`=13,5×99/10+13,5×1/10`
`=13,5×(99/10+1/10)`
`=13,5×100/10`
`=13,5×10`
`=135`
Bạn tham khảo nha:
a)23,75×99,99+23,75÷100
=23,75×99,99÷100
=23,75×0,9999
=2366,9855
b)13,5×9,9+13,5÷10
=13,5×9,9÷10
=13,5×0,99
=13,365
Chúc bạn hoc tốt !^^