A question about multiplication and division of rational numbers Known: 1 + 2 + 3 +33=17x33 Calculate 1-3 + 2-6 + 3-9 + 4-12 + +31-93+32-96+33-99 I hope the process can be more detailed

A question about multiplication and division of rational numbers Known: 1 + 2 + 3 +33=17x33 Calculate 1-3 + 2-6 + 3-9 + 4-12 + +31-93+32-96+33-99 I hope the process can be more detailed


1-3+2-6+3-9+4-12+…… +31-93+32-96+33-99
=1+2+3+…… +33-(3+6+9+…… 99）
=17x33-3×(1+2+3+4+…… +33）
=17×33-3×17×33
=-1122



A mathematical rational multiplication and division problem,
-6 × (- 0.25) × 11 / 14


-6*(-0.25)*11/14
=6*0.25*11/14
=3*2*0.25*11/14
=3*0.5*11/14
=3*1/2*11/14
=(3*1*11)/(2*14)
=33/28

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