## Maths Quiz on decimals

Here is the last plain text quick quiz. I’ll start using Word/Open Office and PDF files now as I need fraction notation. This one covers rounding to decimal places and significant figures, converting to and from Standard Form, and adding and subtracting directed numbers.

I will also start to do the hot potatoes versions with different questions: the aim of the series is to consolidate the basic content of the last lesson in the first 10 minutes of the current lesson. The tests are marked by the students themselves and the aim is to encourage engagement with the basics of each topic. The sequence may help with the ‘functional skills’ aspect of the new GCSE syllabus as well, but I need to do some more reading on that one.

## GCSE Maths Quiz 4

Again, try these questions without a calculator.

Copy and complete the table below

 1) Number 1sf 2sf 3sf 2) 1763 ________ ________ ________ 3) 39.67 ________ ________ ________ 4) 3.14159 ________ ________ ________ 5) 0.00017295 ________ ________ ________ 6) 0.053276 ________ ________ ________

### Now try these

1. Write 5.53×104 as an ordinary number
2. Jupiter ‘weighs’ (has a mass of) approximately 1.9 Ã— 1027 kilograms. Earth weighs 6.0 Ã— 1024 kilograms. How many Earth masses are equal to Jupiter’s mass?
3. Suppose Frieda has Â£560 in the bank after paying for a holiday. She pays for her travel pass (Â£64.75) and her rent (Â£275). Then there was an unusually large electricity bill for Â£135.60, and the food for that month came out around Â£113.75. A jacket in a sale came to Â£35, and a pair of shoes was Â£14.99. Coffee and sandwiches at work and other bits cost Â£37 for the month. How much was Frieda’s overdraft at the end of the month, just before the wages came in?
4. Find -6 – - 7 + 9
5. What is -10 – + 5 ?
6. Find -6×10
7. What is -1 x +1 x -1 x +1 x -1 ?