W/C 22/2/21
Minute Maths
|
5 + 12 = |
13 + 3 = |
12 + 5 = |
3 + 13 = |
20 + 0= |
|
8 + 9 = |
11 + 4 = |
15 + 9 = |
10 + 4 = |
20 + 4= |
|
18 – 3 = |
15 – 8 = |
19 – 4= |
20 – 0= |
10 –10 = |
|
20 +10= |
20+20= |
20+30= |
20+40= |
20+50= |
Challenge
Look what happens each time at add 1 ten (10) to a number. I have coloured our tens digit blue in each number.
25 + 10 = 35
12 + 10 = 22
72 + 10 = 82
Hint - the pattern is NOT the tens digit getting bigger by 1.