Multiplication:
1) Estimate first (to help return the decimal to the answer at the end and to double-check your multiplication) - When estimating with numbers that do not have a whole (e.g. 0.8), think percentages and money (e.g. 0.8 x 5.6 - Think "What would 80% of $5.60 be?)
2) Remove the decimal and multiply like "normal" (two whole numbers)
3) Use your estimation to guide where to put the decimal in the answer.
4) Verify the decimal placement. (How many digits or "spaces" were after decimals in the original question? Make sure there are that many digits or "spaces" after the decimal in your answer too.)
Division:
1) Estimate first
2) Find an "equivalent fraction" by multiplying by 10 or 100 to find one where the denominator (the divisor) is a whole number seeing as division questions are essentially fractions! You'll get the same answer and the dividing is much easier! E.g. 1,26 / 0.7 would be 12.6/7
3) Double check that your answer makes sense with your estimation.
Keep practicing and reviewing! Thanks for the great questions and discussion today!
Mme Killam