Learn how to add and decrease two-digit numbers and tens.
This assignment includes:
Click through the slideshow to see some altered means of abacus and abacus two-digit numbers.
1 3 = 4 and 10 30 = 40. What is the aforementioned and what is altered about these calculations?
Let’s attending at some added examples. What do you apprehension about these calculations?
4 – 2 = 2 and 40 – 20 = 20. What is the aforementioned and what is altered about these calculations?
Can you atom the arrangement in these subtractions?
Can you calculation in 10s, starting from cardinal 10? 10, 20, 30, 40, 50… Did you apprehension that the ones chiffre is consistently aught but the tens chiffre changes? This is because we are abacus ten anniversary time.
Now, can you calculation in 10s, starting from the cardinal 4? 4, 14, 24, 34, 44, 54… What changes and what stays the same? Why do you anticipate this happens?
Can you calculation in 10s, starting from the cardinal 9? 9, 19, 29, 39, 49, 59… What changes and what stays the same? Why do you anticipate this happens?
Worksheet: Add and decrease 10s
This worksheet contains three tasks. Have a go at anniversary task. You can either book it out or address your answers on a area of paper.
Finished? Check your answers here.
Worksheet: Football themed mosaic
This football themed worksheet contains three tasks about abacus and abacus two-digit numbers with ones and tens. Have a go at anniversary assignment and see if you can acknowledge the picture.
Play the accession and addition akin of Karate Bodies Maths – can you aggregate a air-conditioned new apparel for your cats?
Have a attending at these added resources.
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