6th Class Blog
Ms Condron
Firstly this week we’ll look at Pg. 101 of Busy at Maths.
Number Sentences You have been using number sentences since Junior Infants, to put it simply it’s a sentence that instead of words uses numbers and mathematical symbols E.g. 2 + 7 = 9 OR 3 x 8 = 24 OR 16 > 2 + 4 OR 35 < 86 – 6 Remember :
Say whether the number sentence is true or false. Remember do the sum part first and then check is the symbol correct. E.g. 15 + 31 > 42 15 + 31 = 46 so the number sentence is 46 > 42 Yes 46 is greater than 42 so this is true If there is a sum on both sides of the number sentence do BOTH sums and check is the symbol correct. E.g. 12 – 6 = 8 + 7 12 – 6 = 6 and 8 + 7 = 15 so the number sentence is 6 = 15 No 6 is not equal to 15 so this is false. Question 2 In question 2 fill in the correct symbol to make sure the number sentence is correct. Just like in question 1 do the sum part first then fill in the correct symbol. E.g. 2 x 7 ___ 29 – 13 Well 2 x 7 = 14 and 29 – 13 = 16 So 14 ___ 16 14 is less than 16 so the symbol we choose is < 14 < 16 Questions 3 and 4 In questions 3 and 4 we are looking at equations. This is a number sentence with an equals sign. Remember this means that both sides of the equation MUST be the same value. E.g. 36 – 15 = 21 Ask yourself what do I need to do to make both sides equal? E.g. 5 x __ = 35 What do I multiply 5 by to get 35? Well I know 5 times 7 gives me 35 5 x 7 = 35 so Ans = 35 In question 4 both sides have a sum so they are a little more tricky. The rule is to solve the side that has no blanks first then use that answer to work out the missing number. Use this video to help understand more clearly how to solve them. https://www.youtube.com/watch?v=Mmdoq_tsagY Remember try your best and do what you can! Will upload answers at the end of the week!
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