First, convert the mixed numbers to improper fractions.
343=43×4+3=412+3=415 −151=−51×5+1=−55+1=−56 521=25×2+1=210+1=211 Now, substitute the improper fractions into the expression:
415×(−56)+211 Multiply the first two fractions:
415×(−56)=−4×515×6=−2090=−29 Now the expression is:
−29+211 Add the fractions:
−29+211=2−9+11=22=1