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Multiplication and Division 2 (Difficult)
So, you’ve made it to the second of our difficult level Eleven Plus maths quizzes on multiplication and division. If you’ve played all the previous quizzes in this section you should be a dab hand at multiplying and dividing numbers by now – we’ll soon find out!
In the last quiz we concentrated on multiplication and division involving multiples of ten such as, 100, 1,000, 10,000 and 100,000. Large numbers, but all very easy to work with – all you have to do is move the digits the correct number of places in the correct direction (right or left). But I think you are ready for more of a challenge so, in this quiz, we’ll be dealing with large numbers which are not multiples of ten.
I’m sure you mastered long division and long multiplication long ago, so you could do these without any problem with the help of pencil and paper. Instead, try working these answers out in your head, using some of the techniques we’ve learned so far.
So, if you are ready, let’s begin. Good luck!
27.3 × 98 = ?
16,320 ÷ 1,020 = ?
128.2 × 1,005 = ?
128.2 × 1,005 = (128.2 x 1,000) + ((128.2 ÷ 2) x 10) = 128,200 + (64.1 x 10) = 128,200 + 641 = 128,841
14,550 ÷ 300 = ?
14,550 ÷ 300 = (14,550 ÷ 3) ÷ 100 = 4,850 ÷ 100 = 48.5
11,002 × 150 = ?
11,002 × 150 = ((11,002 ÷ 2) x 100) + 11,002 x 100 = (5,501 x 100) + 1,100,200 = 550,100 + 1,100,200 = 1,650,300
350,000 ÷ 9,999 = ?
350,000 ÷ 9,999 = (350,000 ÷ 10,000) + (350,000 ÷ 100,000,000) = 35 + 0.0035 = 35.0035
1.532 × 104 = ?
1.532 × 104 = (1.532 x 100) + (1.532 x 4) = 153.2 + 6.128 = 159.328
342 ÷ 15 = ?
342 ÷ 15 = ((342 ÷ 10) x 2) ÷ 3 = (34.2 x 2) ÷ 3 = 68.4 ÷ 3 = 22.8
14.369 × 210 = ?
14.369 × 210 = ((14.369 x 2) x 100) + (14.369 x 10) = (28.738 x 100) + 143.69 = 2,873.8 + 143.69 = 3,017.49
84,450 ÷ 2,000 = ?
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27.3 × 98 = (27.3 x 100) - (27.3 x 2) = 2,730 - 54.6 = 2,675.4