Bài 1:
a, `3.5^2+15.2^2-26:2`
`=3.25+15.4-26:2`
`=75+60-13`
`=122`
b, ` 5^3. 2-100 : 4 + 2^3. 5`
`=125.2-100:4+8.5`
`=250-25+40`
`=265`
c, `6^2:9+50.2 - 3^3.3`
`=36:9+50.2-27.3`
`=4+100-81`
`=23`
Bài 2:
a, `10 - [(8^2 - 48).5 + (2^3.10 + 8) :28`
`=10-[(64-48)x5+(8x10+8)]:28`
`=10-[16x5+(80+8)]:28`
`=10-(80+88):28`
`=10-168:28`
`=10-6`
`=4`
b, `8697-[3^7: 3^5 + 2(13– 3)]`
`=8697-[3^{7-5}+2.10]`
`=8697-(3^2+2.10)`
`=8697-(9+20)`
`=8697-29`
`=8668`
c, `695 - [200 + (11 - 1)^2]`
`= 659 - [ 200 + 10^2]`
`= 699 - [ 200 + 100 ]`
`= 699 - 300`
`=395`