Đáp án:
`e) 295-(31-2^2 .5)^2+7^18 :7^16+2^2 .3^3`
`= 295 - (31 - 4.5)^2 + 7^2 + 4.9 `
`= 295 - 11^2 + 49 + 36`
`= 295 - 121+49+36`
`=259`
`f) (5^19:5^17+3):7+7^9:7^7-3^2+2^3 .5^2`
`= (5^2 + 3 ) : 7 + 7^2 - 9 + 8 . 25`
`= (25+3) : 7 + 49 - 9 + 200
`= 28 : 7 + 40 + 200`
`= 4 + 240`
`=244`
`g) 1200:2+6^2 .2^1+18+5^9 :5^7+70:14-20`
`= 600 + 36.2 + 18 + 5^2 + 5 - 20`
`= 600 + 72 + 18 + 25 + 5 - 20`
`= 690 + 10`
`= 700`
`h) 3^2 .5-2^2 .7+83+5^9:5^7+12.3+7^0`
`= 9 .5 - 4 .7 + 83 + 5^2 + 36 + 1`
`= 45 - 28 + 83 + 25 + 36 + 1`
`= 100 + 62`
`=162`
Học tốt !