Show how to make a ten to find 12-4. write the number sentence

Making a ten is an arithmetic evaluation strategy where students first find a way to obtain 10 from an expression before proceeding to the remainder.

Given the expression :

12 - 4

Make a ten from 12 :

12 = 10 + 2 (10 remainder 2)

Using subtracting 4 from 10 :

10 - 4 = 6

Adding the remainder (2) to the value obtained :.

6 + 2 = 8

Therefore, the direct procedure also gives the same solution ; 12 - 4 = 8.

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Making tens is an strategy to help student to subtract using this number.

So, we could subtract 12-2 = 10. Now, to fins 12-4, we have to also find the way to transform the ten into 8, because 12-4=8. So, basically, by subtracting 2 units one more time we can get the 8 or 12-4; 10-2=8, and 12-4=8, therefore 10-2=12-4, which is true because 8=8.

rectangle: 9 1/8 x 4 1/9 = 37 37/72in

parallelogram: b times h= 10.3 x 6.2 = 63.86

trapezoid: a+b/2 times h= 42.5

volume of prism: l times w times h= 36

∞ this is your sign