I can use mental calculation strategies for addition, subtraction, multiplication and division

What number is 199 more than 428?

What is the difference between 1999 and 4003?

One orange costs 15p. How much would five oranges cost?

Four pineapples cost £3.40. Calculate the cost of one pineapple.

I can use mental methods for calculations that involve decimals

Multiply nought point seven by nine.

Subtract one point nine from two point seven.

Find the total of 0.2, 0.4 and 0.6.

What is half of three point six?

I can record my working for mental methods that involve several steps

A bottle holds 1 litre of lemonade. Rachel fills 5 glasses with lemonade.

She puts 150 millilitres in each glass. How much lemonade is left in the bottle?

I can choose when to use mental methods, when to use written methods and when to use a calculator

Would you use a mental, written or calculator method to solve each of these? Explain your choice.

23.5 × = 176.25

How many cartons of juice costing 30p each can I buy with £2?

What is the total cost if I buy food costing £3.86 and £8.57?

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Posted by sher on May 8, 2011 at 2:28 pm

1.199

-428

=229

2.1999

-4003

=2004

3.15

x5

=75p

4.£3.60 divide 4 =90p

i can use mental calculations fo addition,subtractoin,time,division.

Posted by sher on May 8, 2011 at 6:11 pm

1.0.7×9=63

2.-0.8

Posted by sher on May 8, 2011 at 6:12 pm

1.150×5=750

2.

Posted by shaughey on May 8, 2011 at 6:42 pm

Great! Well done Sher! I won’t post all your answers so that others can have a try!