Search Results For “thinking of a number”

Adding a single digit to a 3-digit number; there might well be plenty of counting on fingers here!

Once the technique for adding 9 to a number has been mastered, there is no problem with adding 19, 29 or 39!

Subtracting a single digit from a 3-digit number, starting with multiples of 100.

Dividing a number by ten moves it once place to the right. Divide by 100 moves it two places to the right.

Learning the number of days in each month, working out time problems using months, weeks, days, hours and minutes.

More written explanations on which operation to use and whether the question should be done mentally or on paper.

Time problems are especially tricky, especially when finding lengths of time that cross the hour boundary. A good knowledge of the number of days in each month is also needed.

Comparing numbers, lengths and amounts and finding the number half way between two others.

Use a number line to count on and back across zero.

Fill in the missing numbers in the sequences. Firstly, the pattern of the sequence has to be worked out.

The easiest way to order fractions is to make sure they all have the same denominator (bottom number).

When working out which of these number sentences are true remember that the part in brackets should be worked out first.