Toán Bài 4: tính bằng cánh hợp lí nhất 1919/2323×464646/747474×37/10= 23/07/2021 By Isabelle Bài 4: tính bằng cánh hợp lí nhất 1919/2323×464646/747474×37/10=
`1919/2323 xx 464646/747474 xx 37/10` `= (1919 : 101)/(2323 : 101) xx (464646 : 20202)/(747474:20202) xx 37/10` `= 19/23 xx 23/37 xx 37/10` `= (19xx23xx37)/(23xx37xx10)` `= 19/10` Trả lời
`1919/2323` × `464646/747474` × `37/10` = `{1919 : 101}/{2323 : 101}` × `{464646 : 10101}/{747474 : 10101}` × `37/10` = `19/23` × `46/74` × `37/10` = `19/23` × `23/37` × `37/10` = `{19 × 23 × 37}/{23 × 37 × 10}` = `19/10` `#cactus` Trả lời
`1919/2323 xx 464646/747474 xx 37/10`
`= (1919 : 101)/(2323 : 101) xx (464646 : 20202)/(747474:20202) xx 37/10`
`= 19/23 xx 23/37 xx 37/10`
`= (19xx23xx37)/(23xx37xx10)`
`= 19/10`
`1919/2323` × `464646/747474` × `37/10`
= `{1919 : 101}/{2323 : 101}` × `{464646 : 10101}/{747474 : 10101}` × `37/10`
= `19/23` × `46/74` × `37/10`
= `19/23` × `23/37` × `37/10`
= `{19 × 23 × 37}/{23 × 37 × 10}`
= `19/10`
`#cactus`