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Multiplication and Division 3 (Difficult)
Welcome to this, the third quiz in our Difficult section of Eleven Plus maths quizzes on Multiplication and Division. In the first we learned about multiplying and dividing multiples of ten, like 100, 1,000 or 10,000. In the second we made things a little trickier and gave you some tips. In this quiz we shall help you learn how to do your calculations when dealing with decimals and large numbers.
If you have played our other quizzes, then this one shouldn’t be too hard – as long as you remember what you’ve learned! There are some simple ways to work out the answers, which you might not have thought of. Make sure you read all the helpful comments which follow the questions. They’ll make everything much easier to understand!
If you feel confident enough, put your calculators away and only use paper and pencil if you really must. Working out the answers in your head will hone your mind and sharpen your maths skills!
27.83 x 105 = ?
96,000 ÷ 3,000 = ?
Another option, as both numbers end with “000” is to ignore them and divide 96 by 3 – simple!
197.726 x 110 = ?
197.726 x 10 = 1,977.26
197.726 x 100 = 19,772.6
1,977.26 + 19,772.6 = 21,749.86
8,300 ÷ 200 = ?
8,300 ÷ 200 = (8,300 ÷ 2) ÷ 100 = 4,150 ÷ 100 = 41.5
68 x 95 = ?
68 x 95 = (68 x 100) - (68 x 10) ÷ 2 = 6,800 - (680 ÷ 2) = 6,800 - 340 = 6,460
46,000 ÷ 99 = ?
83 x 120 = ?
83 x 120 = (83 x 100) + (83 x 100) ÷ 5 = 8,300 + (8,300 ÷ 5) = 8,300 + 1,660 = 9,960
167.93628 x 10,000 = ?
16,714 ÷ 10,000 = ?
16,714 ÷ 10,000 = 1.6714
75 ÷ 15 = ?
75 ÷ 15 = ((75 ÷ 10) x 2) ÷ 3 = (7.5 x 2) ÷ 3 = 15 ÷ 3 = 5
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27.83 x 5 = (27.83 x 10) ÷ 2 = 278.3 ÷ 2 = 139.15
27.83 x 100 = 2,783
2,783 + 139.15 = 2,922.15