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Đáp án:

Giải thích các bước giải:

 `a`

`A=(3^12 + 3^15)/(1+3^3)`

`A=(3^12(1+3^3))/(1+3^3)`

`A=3^12`

`b`

`B=2:(1/2-2/3)^2 + 0,12563 * 8^3 - (-12)^4 : 6^4`

`B=2 : (-1/6)^2 + (0,125*8)^3 - 12^4 :6^4`

`B=2 :1/36 + 1^3 - (12:6)^4`

`B=2*36 +1 - 3^4`

`B=72 +1 - 81`

`B=72 - 80`

`B=-8`

`c`

`C=-5/12 + (-3,7) - 7/12 -6,3`

`C=-5/12 - 3,7 -7/12 - 6,3`

`C=-(5/12 +7/12) - (3,7 +6,3)`

`C=-1 -10`

`C=-11`

`d`

`D=2,8 *(-6)/13 -7,2 -2,8 * 7/13`

`D=2,8 * (-6/13 -7/13) - 7,2`

`D=2,8*(-1)-7,2`

`D=-10`

`e`

`E-(5^6 +2^2*25^3+2^3*125^3)/(26*5^6)`

`E=(5^6(1+2+8*5^3))/(26*5^6)`

`E=(1+2+8*125)/26`

`E=(3+1000)/26`

`E=1003/26`

`f`

`F=100/123 : (3/4 +7/12) +23/123 : (9/5 - 7/15)`

`F=100/123 : 16/12 + 23/123 : 20/15`

`F=100/123 * 3/4 +23/123 * 3/4`

`F=3/4 (100/123 +23/123)`

`F=3/4*1`

`F=3/4`