AI Tutor - Lucy
Multiplication and division are essential maths skills. In 11 Plus Maths, these operations help students solve problems quickly and understand how numbers are connected.
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To multiply 24 by 100, multiply the non zero numbers and just stick on the two zeros at the end: 100 × 24 = 1 × 24 , and 24 + 00 = 2,400. You should be able to do this in your head
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To divide 250 by 10, just remove the last zero from the number and you are done: 250 ÷ 10 = 25. You should be able to do this in your head
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'Double' means multiply by 2
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'Treble' means multiply by 3: triple = treble
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'Quadruple' means multiply by 4
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To multiply 4.5 by 1,000, just move the decimal point 3 places to the right and add in a zero for each place position if there are no digits in those place positions in the number: 1,000 × 4.5 = 4,500. You should be able to do this in your head
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To divide 85.60 by 100 just move the decimal point 2 places to the left and put in a zero to show that there are no whole numbers: 85.60 ÷ 100 = 0.8560
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To multiply 12 by 300, multiply the non zero numbers and just stick on two zeros at the end: 300 × 12 = 3 × 12 , and 36 + 00 = 3,600. You should be able to do this in your head
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To multiply 10,000 by 100, add together the number of zeros in the two numbers, then write 1 followed by the sum of the zeros: 10,000 × 100 = 1,000,000. Your final answer has six zeros because the sum of the zeros in the two numbers equals six. You should be able to do this in your head
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To divide 10,000 by 1,000, cancel as many zeros in 10,000 as there are in 1,000: 10,000 ÷ 1000 = 10. Your final answer has 1 zero because the 3 zeros in 10,000 cancelled with the 3 zeros in 1,000.You should be able to do this in your head
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