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Multiplication and Division 3 (Medium)
Welcome to the third quiz in our Medium section of Eleven Plus maths quizzes on Multiplication and Division. Multiplying or dividing numbers can be difficult sometimes, especially when dealing with large numbers, decimals or fractions. But don’t worry – this quiz is full of helpful handy hints which will make your exams much easier!
The secret to multiplying or dividing difficult numbers is simplification. Here’s an example:
Suppose you were asked to multiply 14 by 17. That sounds quite hard and I doubt many of us can do it in our heads. But if we simplify it then it’s much easier:
14 x 17 = (14 x 10) + (14 x 7) = 140 + 98 = 238
You see how much easier that was? There are lots of other tricks you can use for multiplication and for division. You might even have some of your own! So, try this quiz, read all the helpful comments, and keep playing until you always score a perfect 10 out of 10. Good luck!
3,846 ÷ 200 = ?
1,275 ÷ 50 = ?
17 x 90 = ?
17 × 90 = ((17 x 10) - 17) x 10 = (170 - 17) x 10 = 153 x 10 = 1,530
406 x 12 = ?
406 × 12 = (406 x 10) + (406 x 2) = 4,060 + 812 = 4,872
24 x 800 = ?
24 × 800 = (24 x 2 x 2 x 2) x 100 = (48 x 2 x 2) x 100 = (96 x 2) x 100 = 192 x 100 = 19,200
138 x 50 = ?
138 × 50 = (138÷ 2) x 100 = 69 x 100. Move the d.p. 2 places to the right gives 6,900
16.5 x 25 = ?
16.5 × 25 = (16.5 x 100) ÷ 4 = 1,650 ÷ 4 = 412.5
34 x 110 = ?
34 x 110 = (34 x 100) + (34 x 10) = 3,400 = 340 = 3,740
14.72 ÷ 5 = ?
14.72 ÷ 5 = (14.72 × 2) ÷ 10 = 29.44 ÷ 10 . Move the d.p. 1 place to the left gives 2.944
18 x 13 = ?
18 x 13 = (18 x 10) + (18 x 3) = 180 + 54 = 234
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3,846 ÷ 2 = 1,923 ÷ 100 = 19.23