1. Which of these expressions has the largest value?
A $1+2 \times 3+4$
B $1+2+3 \times 4$
C $1+2+3+4$
D $1 \times 2+3+4$
E $1 \times 2+3 \times 4$
Solution
B

In this question we must remember to do the multiplications before any of the additions. Hence the values of the five expressions are, in order, 11, 15, 10, 9 and 14. Therefore the expression with the largest value is $\mathrm{B}$.