Evaluate $9.9-5.5$9.9−5.5
Evaluate $6.48-4.23$6.48−4.23
We want to evaluate $7.46-6.43$7.46−6.43.
We want to evaluate $7.89-4.42$7.89−4.42.
Review of the idea of a decimal fraction, place value in the context of decimal fraction, inter conversion of fractions and decimal fractions (avoid recurring decimals at this stage)