Maths – Tuesday 12th May
Mental
maths – Try and do these in your head.
3+ 6+ 7=
14 - 9 =
16 + 6 =
12 + 5+ 8=
25 -6 =
49 - 9 =
12 X 3 =
25 ÷ 5 =
Addition
Look at this example for 379 + 5
The 5 has been partitioned in to 4
and 1.
The 1 then can be added to 379 to
make a number that is a multiple of 10. (380)
Then the 4 can be easily added to 380
to make 384.
Use this method to do the following
calculations: Please show how you partitioned the number to help you.
1. 324 + 9 =
2.
415 + 6 =
3.
675 + 8 =
4.
219 + 6 =
5.
567 + 7 =
6.
805 + 9 =
7. 708 + 5 =
8. 999 + 4 =
In this example the number 7 has been
partitioned into 4 and 3.
When you add 4 to 46 it will make a
multiple of 10 (50).
Then you add the 3 to the 50 to make
53.
Finally the hundreds number is then
added.
Now use a number line to help you
complete the following calculations.
Draw number lines to show how you worked them out.
1.
675 + 6 =
2.
348 + 5 =
3.
421 + 9 =
4.
313 + 8 =
5.
489 + 7=
6.
588 + 4 =
7.
109 + 8 =
8.
867 + 4 =
Challenge
