How to Perform Calculations on a Calculator

Task 1:
a) 1.88
= Step 1: Press 1.8 on calculator
Step 2: Click on Xy function on calculator
Step 3: Press 8
Step 4: Press ‘=’ and the answer is 110.19960576
b) ) 5√243
Step 1: Enter 5
Step 2: Press y√X function
Step 3: Enter 243
Step 4: Press ‘=’ and the answer will be 1.0066451831867605210379005716012
c) 1 / (1+0.07)3
Step 1: Press 1
Step 2: Press ÷
Step 3: Press ((then 1; then +; then 0.07 ; then Xy function; then ); then 3; and finally closing the
bracket with )
Step 4: Press ‘=’, and the answer is 0.81629787689085199458304728895231
d) 2500 x 5-3
Step 1: Press 2500
Step 2: Press ÷
Step 3: Press (; then 5; then Xy function; then 3; and finally press )
Step 4: Press ‘=’, and the answer is 20
e) 34.18 + √79 /0.4375−2.28
Step 1: Press (; then 34.18