1. thousand
2. 50
3. 2,473
4. Nearest hundred's place for 156 is 200 and nearest hunderds place for 235 is 200. The sum of them both is 400.
25mm is the same as 2.5cm.
12+2
14
0.5+0.5
1
14+1
15
12 1/2cm + 25mm = 15cm
I don’t understand show a picture
If you have no calculator, pretend like the decimals aren’t there then add them back depending on how many places you have after the decimal. for example: 2.5 times 2.5, if you pretend there are no decimals, you get 625, then you have to add the decimals back. since you have 1 digit after each decimal in each number, you add 1+1=2 to get the number of places you have to add back. so you get 6.25
C+9
you have to subtract 4c and 3c to get 1c (which can be simplified to c) and you add 8 and 1 to get 9
