23: 8-5×(-4)
24: 9+(-36)÷(-4)
Follow PEMDAS (parentheses exponents multiplication division addition subtraction)
23:
5×(-4)= -20
8-(-20) goes to 8+20.
8+20=28
24:
9+(-36)÷(-4)
-36÷(-4)=9
9+9=18
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