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Question

Simplify:
(i) -32+54-74
(ii) 53-76+-23
(iii) 54-76--23
(iv) -25--310--47

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Solution

(i) -32+54-74=-3×22×2+54-74=-6+5-74=-84=-2(ii) 53-76+-23=5×23×2-76+-2×23×2=10-7-46=-16

(iii) 54-76--23=5×34×3-7×26×2--2×43×4=15-14+812=912=34(iv) -25--310--47=-2×145×14--3×710×7--4×107×10=-28+21+4070=3370

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