Tính bằng cách thuận tiện nhất a] 6482+597+403+518 b]590+160+210+410 c]25x12x4 d]615×101 e]273×99 28/10/2021 Bởi Josephine Tính bằng cách thuận tiện nhất a] 6482+597+403+518 b]590+160+210+410 c]25x12x4 d]615×101 e]273×99
`a) 6482+597+403+518` `= (6482+518)+(597+403)` `= 7000+1000` `= 8000` `b) 590+160+210+410` `= (590+410)+(160+210)` `= 1000+370` `= 1370` `c) 25×12×4` `= (25×4)×12` `= 100×12` `= 1200` `d) 615×101` `= 62115` `e) 273×99` `= 27027` Bình luận
a) ${ 6482+597+403+518}$ ${= (6482+518)+(597+403)}$ ${= 7000+1000=8000}$ b) ${590+160+210+410}$ ${=(590+210)+(160+410)}$ ${=800+570=1370}$ c) $\text{ 25 x 12 x 4 = (25 x 4) x 12 = 100 x 12=1200}$ d) $\text{615 x 101 = 615 x 100 + 615 = 61500 + 615 = 62115 }$ e) $\text{ 273 x 99 = 273 x 100 – 273 = 27300 – 273 = 27027 }$ Bình luận
`a) 6482+597+403+518`
`= (6482+518)+(597+403)`
`= 7000+1000`
`= 8000`
`b) 590+160+210+410`
`= (590+410)+(160+210)`
`= 1000+370`
`= 1370`
`c) 25×12×4`
`= (25×4)×12`
`= 100×12`
`= 1200`
`d) 615×101`
`= 62115`
`e) 273×99`
`= 27027`
a) ${ 6482+597+403+518}$
${= (6482+518)+(597+403)}$
${= 7000+1000=8000}$
b) ${590+160+210+410}$
${=(590+210)+(160+410)}$
${=800+570=1370}$
c) $\text{ 25 x 12 x 4 = (25 x 4) x 12 = 100 x 12=1200}$
d) $\text{615 x 101 = 615 x 100 + 615 = 61500 + 615 = 62115 }$
e) $\text{ 273 x 99 = 273 x 100 – 273 = 27300 – 273 = 27027 }$