WALT add and subtract numbers involving decimals
Make sure you show how you worked it out! Using brackets ( ) to expand numbers out
- 3.4 + 6.7 = 10.1
(3 + 6 = 9)+ (0.4 +0.7 = 1.1)
- 12.8 + 9 = 21.8
(12 + 9 = 21) + ( 0.8+0.0 = 0.8 )
- 23.2 + 38.5 = 61.7
(23 + 38 = 61) + (0.2 + 0.5 =0.7)
- 10 + 0.7 = 10.7
(10 + 0 = 10 ) +( 0.7 + 0.0 = 0.7)
- 47.5 + 61.8 =109.3
(47 + 61 = 108) + (0.5 +0.8 = 1.3)
- 18 + 4.8 =22.8
(18 + 4 = 22) (0.8 +0.0 = 0.8)
- 33.5 + 7.6 = 41.1
(33 + 7 =40) (0.5 + 0.6 = 1.1 )
- 68 + 12.3 =80.3
(68 + 12 = 80) (0.0 +0.3 = 0.3)
- 19.5 + 19.5 =39.0
(19 + 19 = 38) (0.5 +0.5 =1.0)
- 172 + 17.2 = 190.2
(172 + 17 =190) (0.0 + 0.2 = 0.2)
- 23.3 + 4.4 = 27.7
(23 + 4 = 27) + (0.3 + 0.4 = 0.7)
- 101 + 110.1 = 211.1
(101 + 110 =211) + ( 0.0 +0.1 =0.1)
SUBTRACTION!!!!!
- 8.3 - 6.6 = 2.3
(8 - 6 = 2) + (0.6 -0.3 = 0.3 )
- 13.7 - 9 = 4.7
(13 - 9 = 4) + 0.7 +0.0 )
- 29.9 - 10.5 = 19.4
(29 - 10 = 19) + (0.9 - 0.5 = 0.4 )
- 10 - 4.7 = 6.7(10 - 4 = 6) + ( 0.0 - 0.7 = 0.7)
- 40.4 - 1.9 = 39.5
(40 - 1 = 39) +( 0.4 - 0.9 = 0.5 )- 11.6 - 3.8 = 9.2
(11 - 3 = 9 ) + ( 0.6 - 0.8 = 0.2)- 37.2 - 3.1 = 34.1
(37 - 3 = 34) + (0.2 - 0.1= 0.1)- 68.4 - 22.3 =46.1
(68 - 22 =46) + (0.4 - 0.3 = 0.1)- 30 - 17.5 = 13.5
(30 -17 = 13) + (0.0 - 0.5 = 0.5)- 262 - 26.2 = 236.2
(262 - 26 = 236) + (0.0 - 0.2 = 0.2)- 503.3 - 54.4 =457.1
(503 - 54 =457) + ( 0.3 - 0.4 = 0.1)- 903 - 130.8 = 773.8
(903 - 130 = 773) + (0.0 - 0.8 = 0.8)
Kia ora Anahere,
ReplyDeleteHappy holidays! I hope that you are having a nice break from school and enjoying special time with family and friends. Last year, at this time, you were an amazing part of our holiday blogging programme. I hope that you have time to join us again this year. I'd love to read your blogs, post comments and award you points.
Hope to see you online as part of the Winter Learning Journey programme soon!
Cheers,
Rachel :)